Update paper for newer submission template

This reverts commit cb81979a7f.

coil_mag_solvers.yml

@@ -1,21 +1,3 @@
-Coil_Solver:
-  Equation: CoilSolver
-  Procedure: '"CoilSolver" "CoilSolver"'
-  Linear System Solver: Iterative
-  Linear System Preconditioning: ILU1
-  Linear System Max Iterations: 1000
-  Linear System Convergence Tolerance: 1e-10
-  Linear System Iterative Method: BiCGStab
-  Linear System Residual Output: 10
-  Steady State Convergence Tolerance: 1e-06
-  Normalize Coil Current: True
-  Nonlinear System Consistent Norm: True
-  Coil Closed: True
-  Narrow Interface: True
-  Save Coil Set: True
-  Save Coil Index: True
-  Calculate Elemental Fields: True
-
 Static_Current_Conduction:
   Equation: Static Current Conduction
   Variable: Potential

coil_parasitics.py

@@ -208,13 +208,13 @@ def inductance(mesh_file, sim_dir, solver_method):
     fr4 = elmer.load_material('fr4', sim, 'coil_mag_materials.yml')
     copper = elmer.load_material('copper', sim, 'coil_mag_materials.yml')
 
-    solver_coil = elmer.load_solver('Coil_Solver', sim, 'coil_mag_solvers.yml')
+    solver_current = elmer.load_solver('Static_Current_Conduction', sim, 'coil_mag_solvers.yml')
     solver_magdyn = elmer.load_solver('Magneto_Dynamics', sim, 'coil_mag_solvers.yml')
     if solver_method:
         solver_magdyn.data['Linear System Iterative Method'] = solver_method
     solver_magdyn_calc = elmer.load_solver('Magneto_Dynamics_Calculations', sim, 'coil_mag_solvers.yml')
 
-    copper_eqn = elmer.Equation(sim, 'copperEqn', [solver_coil, solver_magdyn, solver_magdyn_calc])
+    copper_eqn = elmer.Equation(sim, 'copperEqn', [solver_current, solver_magdyn, solver_magdyn_calc])
     air_eqn = elmer.Equation(sim, 'airEqn', [solver_magdyn, solver_magdyn_calc])
 
     bdy_trace = elmer.Body(sim, 'trace', [physical['trace'][1]])
@@ -237,20 +237,20 @@ def inductance(mesh_file, sim_dir, solver_method):
     bdy_if_bottom.material = copper
     bdy_if_bottom.equation = copper_eqn
 
-    comp_coil = elmer.Component(sim, 'Coil', [bdy_trace])
-    comp_coil.data['Desired Current Density'] = 'Real 1.0'
-
-    current_force = elmer.BodyForce(sim, 'Source', {
-        'Current Density 1': 'Equals "CoilCurrent e 1"',
-        'Current Density 2': 'Equals "CoilCurrent e 2"',
-        'Current Density 3': 'Equals "CoilCurrent e 3"',
-        })
-    bdy_trace.body_force = current_force
+    potential_force = elmer.BodyForce(sim, 'electric_potential', {'Electric Potential': 'Equals "Potential"'})
+    bdy_trace.body_force = potential_force
 
     # boundaries
     boundary_airbox = elmer.Boundary(sim, 'FarField', [physical['airbox_surface'][1]])
     boundary_airbox.data['Electric Infinity BC'] = 'True'
 
+    boundary_vplus = elmer.Boundary(sim, 'Vplus', [physical['interface_top'][1]])
+    boundary_vplus.data['Potential'] = 1.0
+    boundary_vplus.data['Save Scalars'] = True
+
+    boundary_vminus = elmer.Boundary(sim, 'Vminus', [physical['interface_bottom'][1]])
+    boundary_vminus.data['Potential'] = 0.0
+
     with tempfile.TemporaryDirectory() as tmpdir:
         tmpdir = sim_dir if sim_dir else Path(tmpdir)
 
@@ -261,8 +261,6 @@ def inductance(mesh_file, sim_dir, solver_method):
                    stdout_log=(tmpdir / 'ElmerGrid_stdout.log'),
                    stderr_log=(tmpdir / 'ElmerGrid_stderr.log'))
         solver_stdout, solver_stderr = (tmpdir / 'ElmerSolver_stdout.log'), (tmpdir / 'ElmerSolver_stderr.log')
-        print('Solver stdout:', solver_stdout)
-        print('Solver stderr:', solver_stderr)
         res = elmer_solver(tmpdir,
                    stdout_log=solver_stdout,
                    stderr_log=solver_stderr)

coil_test_board.kicad_prl

@@ -10,6 +10,7 @@
     "opacity": {
       "images": 0.6,
       "pads": 1.0,
+      "shapes": 1.0,
       "tracks": 1.0,
       "vias": 1.0,
       "zones": 0.6
@@ -62,9 +63,10 @@
       35,
       36,
       39,
-      40
+      40,
+      41
     ],
-    "visible_layers": "fffffff_ffffffff",
+    "visible_layers": "ffffffff_ffffffff",
     "zone_display_mode": 0
   },
   "git": {
@@ -75,9 +77,71 @@
   },
   "meta": {
     "filename": "coil_test_board.kicad_prl",
-    "version": 3
+    "version": 4
+  },
+  "net_inspector_panel": {
+    "col_hidden": [
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false
+    ],
+    "col_order": [
+      0,
+      1,
+      2,
+      3,
+      4,
+      5,
+      6,
+      7,
+      8,
+      9
+    ],
+    "col_widths": [
+      0,
+      0,
+      0,
+      0,
+      0,
+      0,
+      0,
+      0,
+      0,
+      0
+    ],
+    "custom_group_rules": [],
+    "expanded_rows": [],
+    "filter_by_net_name": true,
+    "filter_by_netclass": true,
+    "filter_text": "",
+    "group_by_constraint": false,
+    "group_by_netclass": false,
+    "show_unconnected_nets": false,
+    "show_zero_pad_nets": false,
+    "sort_ascending": true,
+    "sorting_column": 0
   },
   "project": {
     "files": []
+  },
+  "schematic": {
+    "selection_filter": {
+      "graphics": true,
+      "images": true,
+      "labels": true,
+      "lockedItems": false,
+      "otherItems": true,
+      "pins": true,
+      "symbols": true,
+      "text": true,
+      "wires": true
+    }
   }
 }

coil_test_board.kicad_pro

@@ -6,14 +6,14 @@
         "apply_defaults_to_fp_fields": false,
         "apply_defaults_to_fp_shapes": false,
         "apply_defaults_to_fp_text": false,
-        "board_outline_line_width": 0.049999999999999996,
-        "copper_line_width": 0.19999999999999998,
+        "board_outline_line_width": 0.05,
+        "copper_line_width": 0.2,
         "copper_text_italic": false,
         "copper_text_size_h": 1.5,
         "copper_text_size_v": 1.5,
         "copper_text_thickness": 0.3,
         "copper_text_upright": false,
-        "courtyard_line_width": 0.049999999999999996,
+        "courtyard_line_width": 0.05,
         "dimension_precision": 4,
         "dimension_units": 3,
         "dimensions": {
@@ -24,13 +24,13 @@
           "text_position": 0,
           "units_format": 1
         },
-        "fab_line_width": 0.09999999999999999,
+        "fab_line_width": 0.1,
         "fab_text_italic": false,
         "fab_text_size_h": 1.0,
         "fab_text_size_v": 1.0,
         "fab_text_thickness": 0.15,
         "fab_text_upright": false,
-        "other_line_width": 0.09999999999999999,
+        "other_line_width": 0.1,
         "other_text_italic": false,
         "other_text_size_h": 1.0,
         "other_text_size_v": 1.0,
@@ -41,11 +41,11 @@
           "height": 1.524,
           "width": 1.524
         },
-        "silk_line_width": 0.09999999999999999,
+        "silk_line_width": 0.1,
         "silk_text_italic": false,
         "silk_text_size_h": 1.0,
         "silk_text_size_v": 1.0,
-        "silk_text_thickness": 0.09999999999999999,
+        "silk_text_thickness": 0.1,
         "silk_text_upright": false,
         "zones": {
           "min_clearance": 0.5
@@ -63,15 +63,20 @@
         "copper_edge_clearance": "error",
         "copper_sliver": "warning",
         "courtyards_overlap": "error",
+        "creepage": "error",
         "diff_pair_gap_out_of_range": "error",
         "diff_pair_uncoupled_length_too_long": "error",
         "drill_out_of_range": "error",
         "duplicate_footprints": "warning",
         "extra_footprint": "warning",
         "footprint": "error",
+        "footprint_filters_mismatch": "ignore",
+        "footprint_symbol_mismatch": "warning",
         "footprint_type_mismatch": "ignore",
         "hole_clearance": "error",
         "hole_near_hole": "error",
+        "hole_to_hole": "warning",
+        "holes_co_located": "warning",
         "invalid_outline": "error",
         "isolated_copper": "warning",
         "item_on_disabled_layer": "error",
@@ -98,7 +103,9 @@
         "text_thickness": "warning",
         "through_hole_pad_without_hole": "error",
         "too_many_vias": "error",
+        "track_angle": "error",
         "track_dangling": "warning",
+        "track_segment_length": "error",
         "track_width": "error",
         "tracks_crossing": "error",
         "unconnected_items": "error",
@@ -111,27 +118,29 @@
         "min_clearance": 0.0,
         "min_connection": 0.0,
         "min_copper_edge_clearance": 0.5,
+        "min_groove_width": 0.0,
         "min_hole_clearance": 0.25,
         "min_hole_to_hole": 0.25,
-        "min_microvia_diameter": 0.19999999999999998,
-        "min_microvia_drill": 0.09999999999999999,
+        "min_microvia_diameter": 0.2,
+        "min_microvia_drill": 0.1,
         "min_resolved_spokes": 2,
         "min_silk_clearance": 0.0,
-        "min_text_height": 0.7999999999999999,
+        "min_text_height": 0.8,
         "min_text_thickness": 0.08,
         "min_through_hole_diameter": 0.3,
         "min_track_width": 0.0,
-        "min_via_annular_width": 0.09999999999999999,
+        "min_via_annular_width": 0.1,
         "min_via_diameter": 0.5,
         "solder_mask_to_copper_clearance": 0.0,
         "use_height_for_length_calcs": true
       },
       "teardrop_options": [
         {
-          "td_onpadsmd": true,
+          "td_onpthpad": true,
           "td_onroundshapesonly": false,
+          "td_onsmdpad": true,
           "td_ontrackend": false,
-          "td_onviapad": true
+          "td_onvia": true
         }
       ],
       "teardrop_parameters": [
@@ -206,6 +215,7 @@
       "mfg": "",
       "mpn": ""
     },
+    "layer_pairs": [],
     "layer_presets": [],
     "viewports": []
   },
@@ -234,6 +244,7 @@
         "microvia_drill": 0.1,
         "name": "Default",
         "pcb_color": "rgba(0, 0, 0, 0.000)",
+        "priority": 2147483647,
         "schematic_color": "rgba(0, 0, 0, 0.000)",
         "track_width": 0.2,
         "via_diameter": 0.6,
@@ -242,7 +253,7 @@
       }
     ],
     "meta": {
-      "version": 3
+      "version": 4
     },
     "net_colors": null,
     "netclass_assignments": null,
@@ -257,7 +268,7 @@
       "pos_files": "",
       "specctra_dsn": "",
       "step": "",
-      "svg": "",
+      "svg": "svg_vis",
       "vrml": ""
     },
     "page_layout_descr_file": ""

make_wide_coils.py

@@ -0,0 +1,100 @@
+#!/bin/sh
+
+import math
+import subprocess
+import tempfile
+
+from gerbonara import utils
+from gerbonara.cad.kicad import pcb as kicad_pcb
+from gerbonara.cad.kicad import graphical_primitives as kicad_gr
+from gerbonara.cad.kicad import footprints as kicad_fp
+
+outer_dias = [40, 65, 90]
+
+nks = [[(1, 150),
+        (1, 300),
+        (1, 480)],
+       [(53, 50),
+        (53, 100),
+        (53, 160)],
+       [(53, 100),
+        (53, 200),
+        (53, 320)],
+       [(53, 150),
+        (53, 300),
+        (53, 480)],
+       [(53, 1),
+        (53, 1),
+        (53, 1)]]
+
+def make_pad(x, y, side, w, h, **kwargs):
+    f = kicad_fp.Footprint(name=f'conn_gen_01x{n}', _version=None, generator=None, at=kicad_fp.AtPos(x, y, 0), **kwargs)
+
+    for i in range(n):
+        f.pads.append(kicad_fp.Pad(
+            layers=['F.Mask', 'F.Cu'] if side == 'top' else ['B.Mask', 'B.Cu'],
+            number=str(i+1),
+            type=kicad_fp.Atom.smd,
+            shape=kicad_fp.Atom.rect,
+            at=kicad_fp.AtPos(0, 0, 0),
+            size=kicad_fp.XYCoord(w, h),
+            footprint=f))
+
+    return f
+
+for case_num, nk in enumerate(nks, start=1):
+    board_out = kicad_pcb.Board.empty_board()
+
+    for (i, d2), (n, k) in zip(enumerate(outer_dias), nk):
+        d1 = d2 - 15
+
+        with tempfile.NamedTemporaryFile(suffix='.kicad_pcb') as f:
+            args = 'python twisted_coil_gen_twolayer.py --circle-segments 331 --trace-width 0.13 --via-drill 0.3 --via-diameter 0.6 --via-offset 0.3'.split() + [
+                '--pcb', f.name,
+                '--turns', str(n), '--twists', str(k),
+                '--inner-diameter', str(d1), '--outer-diameter', str(d2),
+                ]
+
+            if k > 100:
+                args += ['--stagger-inner-vias', '--stagger-outer-vias', '--via-offset', '0.4']
+
+            subprocess.run(args, check=True)
+
+            for obj in kicad_pcb.Board.open(f.name).objects():
+                board_out.add(obj)
+
+        board_out.add(kicad_gr.Text(text=f'case {case_num} n={n} k={k}\\nd={d1:.1f}-{d2:.2f}mm\\nt=0.15mm',
+                                at=kicad_gr.AtPos(0, (d1+d2)/2/2), layer=kicad_gr.TextLayer('F.SilkS')))
+
+        # Slots
+        if i < len(outer_dias)-1:
+            na = 8
+            r2 = d2/2
+            r = r2 + 2.5
+            aw = 2*math.asin(3 / 2 / r)
+            for j in range(na):
+                start = utils.rotate_point(r, 0, (j+1)*2*math.pi/na - aw/2)
+                end = utils.rotate_point(r, 0, j*2*math.pi/na + aw/2)
+                arc = kicad_gr.Arc(end=end, center=(0, 0), start=start, stroke=kicad_gr.Stroke(width=1.2), layer='Edge.Cuts')
+                board_out.add(arc)
+
+        # Connecting pads
+        board_out.add(make_pad(d2/2+1, 0, 'top', 2, 0.7))
+        board_out.add(make_pad(d2/2+1, 0, 'bottom', 2, 0.7))
+        board_out.add(kicad_pcb.TrackSegment(start=kicad_pcb.XYCoord(d2/2, 0), end=kicad_pcb.XYCoord(d2/2+1, 0), width=0.15, layer='F.Cu'))
+        board_out.add(kicad_pcb.TrackSegment(start=kicad_pcb.XYCoord(d2/2, 0), end=kicad_pcb.XYCoord(d2/2+1, 0), width=0.15, layer='B.Cu'))
+
+    # Circular board outline
+    board_out.add(kicad_gr.Circle(center=kicad_gr.XYCoord(0, 0), end=kicad_gr.XYCoord(d2/2+5, 0), layer='Edge.Cuts'))
+
+    # Silk crosshairs
+    r = d2/2 * math.sin(math.pi/4)
+    board_out.add(kicad_gr.Line(start=kicad_gr.XYCoord(-r, -r), end=kicad_gr.XYCoord(r, r), layer='F.SilkS'))
+    board_out.add(kicad_gr.Line(start=kicad_gr.XYCoord(r, -r), end=kicad_gr.XYCoord(-r, r), layer='F.SilkS'))
+    board_out.add(kicad_gr.Line(start=kicad_gr.XYCoord(-r, -r), end=kicad_gr.XYCoord(r, r), layer='B.SilkS'))
+    board_out.add(kicad_gr.Line(start=kicad_gr.XYCoord(r, -r), end=kicad_gr.XYCoord(-r, r), layer='B.SilkS'))
+    r = d2/2
+    board_out.add(kicad_gr.Line(start=kicad_gr.XYCoord(0, r), end=kicad_gr.XYCoord(0, -r), layer='B.SilkS'))
+    board_out.add(kicad_gr.Line(start=kicad_gr.XYCoord(r, 0), end=kicad_gr.XYCoord(-r, 0), layer='B.SilkS'))
+
+    board_out.write(f'wide_coil_{case_num}.kicad_pcb')

paper/.gitignore

@@ -0,0 +1,7 @@
+*.bbl
+*.blg
+*.aux
+*.log
+*.bcf
+*.run.xml
+*.out

paper/Makefile

@@ -8,7 +8,7 @@ MAKEFLAGS += --no-builtin-rules
 
 main_tex ?= paper
 
-VERSION_STRING := $(shell git describe --tags --long --dirty)
+VERSION_STRING := $(shell git describe --tags --long)
 
 all: ${main_tex}.pdf
 
@@ -17,8 +17,26 @@ all: ${main_tex}.pdf
 	biber $* 
 	pdflatex -shell-escape $<
 
+paper_biber.bib:
+	biber --output-format=bibtex --output-resolve paper.bcf
+
+submission.zip:
+	rm -f submission.zip
+	zip -r submission.zip paper.tex paper.bib version.tex \
+		figures/klein-spulen-schwingkreise-korbspule.jpg\
+		figures/k_ripple_plot.pdf\
+		figures/nk_combined.pdf\
+		figures/nk_complex_illust.pdf\
+		figures/rms_ripple_double_rotation_n3_r4.pdf\
+		figures/saacke-radiotechnik-3-ledionspule.jpg\
+		figures/svg_vis_paper_plain.png\
+		figures/svg_vis_paper.png\
+		figures/symmetry_3turn_n_twist.pdf\
+		figures/test_schematic.pdf\
+		figures/setup_probe_small.jpg
+
 version.tex: ${main_tex}.tex paper.bib
-	echo "${VERSION_STRING}" > $@
+	echo -n "${VERSION_STRING}" > $@
 
 .PHONY: clean
 clean:

paper/figures/test_schematic.svg

@@ -0,0 +1,825 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="185.356mm"
+   height="93.594002mm"
+   viewBox="0 0 185.356 93.594002"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.4 (e7c3feb100, 2024-10-09)"
+   sodipodi:docname="test_schematic.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="mm"
+     inkscape:zoom="1.6641134"
+     inkscape:cx="244.27422"
+     inkscape:cy="142.71864"
+     inkscape:window-width="3183"
+     inkscape:window-height="1783"
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+       inkscape:isstock="true"
+       inkscape:collect="always"
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paper/version.tex

@@ -1 +1 @@
-
+final-tpel-submission-2025-01-27-0-g99d4905

sim_runner.py

@@ -14,6 +14,7 @@ import time
 import math
 import json
 import subprocess
+import re
 
 import tqdm
 import click
@@ -25,7 +26,7 @@ def mesh_args(db, coil_id, mesh_type, mesh_file, outfile, **kwargs):
     rows = dict(db.execute('SELECT key, value FROM results WHERE coil_id=?', (coil_id,)).fetchall())
     rows.update(kwargs)
     args = ['python', '-m', 'twisted_coil_gen_twolayer', mesh_type, mesh_file, '--pcb']
-    for k, v in rows:
+    for k, v in rows.items():
         prefix, _, k = k.partition('.')
         if v != 'False' and prefix == 'gen':
             args.append('--' + k.replace('_', '-'))
@@ -104,9 +105,10 @@ def list_runs(ctx):
 
 @cli.command()
 @click.option('-r', '--run-id')
+@click.option('-l', '--log-dir', default='logs', type=click.Path(dir_okay=True, file_okay=False, path_type=pathlib.Path))
 @click.option('-m', '--mesh-dir', default='meshes')
 @click.pass_context
-def list_coils(ctx, run_id, mesh_dir):
+def list_coils(ctx, run_id, log_dir, mesh_dir):
     db = ctx.obj['db_connect']()
     if run_id is None:
         run_id, = db.execute('SELECT run_id FROM runs ORDER BY timestamp DESC LIMIT 1').fetchone()
@@ -122,9 +124,11 @@ def list_coils(ctx, run_id, mesh_dir):
             'gen.inner_diameter': 'ID[mm]',
             'gen.outer_diameter': 'OD[mm]',
             'calculated_fill_factor': 'Fill factor',
-            'calculated_approximate_inductance': 'L [µH]',
+            'calculated_approximate_inductance': 'L [µH] (design)',
             'calculated_trace_length': 'track len [mm]',
-            'calculated_approximate_resistance': 'R [mΩ]'}
+            'calculated_approximate_resistance': 'R [mΩ] (design)',
+            'sim_inductance': 'L [µH] (sim)',
+            'sim_resistance': 'R [mΩ] (sim)'}
     out = []
     for row in db.execute('SELECT *, MAX(meshes.timestamp) FROM coils LEFT JOIN meshes ON coils.coil_id=meshes.coil_id WHERE run_id=? GROUP BY coils.coil_id, mesh_type ORDER BY meshes.timestamp', (run_id,)).fetchall():
         if row['timestamp']:
@@ -151,6 +155,19 @@ def list_coils(ctx, run_id, mesh_dir):
         if 'calculated_fill_factor' in params:
             params['calculated_fill_factor'] = f'{float(params["calculated_fill_factor"]):.03f}'
 
+        log_file = log_dir / (pathlib.Path(row['filename']).stem + '_elmer_self_inductance.log')
+        if log_file.is_file():
+            log = log_file.read_text()
+            resistance = re.search(r'Coil resistance calculated by solver: ([0-9.e+-]*) (\w?)Ω', log)
+            inductance = re.search(r'Inductance calucated from field: ([0-9.e+-]*) (\w?)H', log)
+            si_prefix = {'': 1, 'm': 1e-3, 'µ': 1e-6, 'n': 1e-9, 'p': 1e-12}
+            if resistance:
+                resistance = float(resistance.group(1)) * si_prefix[resistance.group(2)]
+                params['sim_resistance'] = format(resistance*1e3, '.3f')
+            if inductance:
+                inductance = float(inductance.group(1)) * si_prefix[inductance.group(2)]
+                params['sim_inductance'] = format(inductance*1e6, '.3f')
+
         out.append([row['coil_id'], row['mesh_type'], state, row['timestamp']] + [params.get(key, '-') for key in keys])
 
     print(tabulate(out, headers=['coil', 'mesh', 'state', 'time'] + list(keys.values()), disable_numparse=True, stralign='right'))
@@ -180,13 +197,13 @@ def run(ctx, run_id, log_dir, mesh_dir):
 
 @run.command()
 @click.option('-j', '--num-jobs', type=int, default=1, help='Number of jobs to run in parallel')
+@click.option('-t', '--mesh-type', type=click.Choice(['split', 'normal', 'mutual']), default=['split', 'normal', 'mutual'], multiple=True)
 @click.pass_context
-def generate_meshes(ctx, num_jobs):
+def generate_meshes(ctx, num_jobs, mesh_type):
     db = ctx.obj['db_connect']()
     rows = [row['coil_id'] for row in db.execute('SELECT coil_id FROM coils WHERE run_id=?', (ctx.obj['run_id'],)).fetchall()]
-    mesh_types = ['split', 'normal', 'mutual']
 
-    params = list(itertools.product(rows, mesh_types))
+    params = list(itertools.product(rows, mesh_type))
     all_files = {get_mesh_file(db, ctx.obj['mesh_dir'], ctx.obj['run_id'], coil_id, mesh_type): (coil_id, mesh_type) for coil_id, mesh_type in params}
     todo = [(coil_id, mesh_type) for f, (coil_id, mesh_type) in all_files.items() if not f.is_file()]
 
@@ -232,7 +249,7 @@ def self_inductance(ctx, num_jobs):
                 with tempfile.TemporaryDirectory() as tmpdir:
                     try:
                         tqdm.tqdm.write(f'Processing {mesh_file}')
-                        res = subprocess.run(['python', '-m', 'coil_parasitics', 'inductance', '--sim-dir', tmpdir, mesh_file], check=True, capture_output=True)
+                        res = subprocess.run(['python', '-m', 'coil_parasitics', 'inductance', '--sim-dir', tmpdir, mesh_file], check=True, capture_output=True, text=True)
                         logfile.write_text(res.stdout+res.stderr)
                     except subprocess.CalledProcessError as e:
                         print(f'Error running simulation, rc={e.returncode}')
@@ -266,8 +283,8 @@ def self_inductance(ctx, num_jobs):
     q.join()
 
 @run.command()
-@click.option('target_hosts', type=click.Path(exists=True, dir_okay=False, path_type=pathlib.Path), help='File with one SSH target host name per line')
-@click.option('job_file', type=click.Path(exists=True, dir_okay=False, path_type=pathlib.Path), help='JSON job description file')
+@click.argument('target_hosts', type=click.Path(exists=True, dir_okay=False, path_type=pathlib.Path))
+@click.argument('job_file', type=click.Path(exists=True, dir_okay=False, path_type=pathlib.Path))
 @click.pass_context
 def run_mutual_inductance(ctx, target_hosts, job_file):
     db = ctx.obj['db_connect']()
@@ -301,7 +318,7 @@ def run_mutual_inductance(ctx, target_hosts, job_file):
                                        'ElmerGrid_stderr.log',
                                        'ElmerSolver_stdout.log',
                                        'ElmerSolver_stderr.log']:
-                            subprocess.run(['scp', f'{host}:{mesh_abs}/{workdir.name}/{fn}', str(host_log(Path(fn).stem))], check=True, capture_output=True, text=True)
+                                subprocess.run(['scp', f'{host}:{mesh_abs}/{workdir.name}/{fn}', str(host_log(Path(fn).stem))], check=True, capture_output=True, text=True)
 
                         except subprocess.CalledProcessError as e:
                             print(f'Error copying simulation logs, rc={e.returncode}', file=sys.stderr)

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+       id="g1411"
+       transform="translate(-349.4,-134.36458)" />
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+       style="fill:#d0d2cd;fill-opacity:1;stroke:none"
+       id="g1412"
+       transform="translate(-349.4,-134.36458)" />
+    <g
+       style="fill:#d0d2cd;fill-opacity:1;stroke:none"
+       id="g1413"
+       transform="translate(-349.4,-134.36458)" />
+    <g
+       style="fill:#c83434;fill-opacity:1;stroke:none"
+       id="g2597"
+       transform="translate(-349.4,-134.36458)" />
+    <g
+       style="fill:#c83434;fill-opacity:1;stroke:none"
+       id="g2598"
+       transform="translate(-349.4,-134.36458)" />
+    <g
+       style="fill:none;stroke:#c83434;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;stroke-opacity:1"
+       id="g2599"
+       transform="translate(-349.4,-134.36458)" />
+    <g
+       style="fill:none;stroke:#c83434;stroke-width:0.5;stroke-linecap:round;stroke-linejoin:round;stroke-opacity:1"
+       id="g2848"
+       transform="translate(-349.4,-134.36458)" />
+    <g
+       style="fill:#d0d2cd;fill-opacity:1;stroke:none"
+       id="g1359"
+       transform="translate(-292.4,-121.4)">
+      <path
+         id="circle1358"
+         d="M 293.9999 121.4 A 1.6 1.6 0 0 0 292.4 122.9999 A 1.6 1.6 0 0 0 293.9999 124.5998 A 1.6 1.6 0 0 0 295.5998 122.9999 A 1.6 1.6 0 0 0 293.9999 121.4 z M 333.00011 121.4 A 1.6 1.6 0 0 0 331.4002 122.9999 A 1.6 1.6 0 0 0 333.00011 124.5998 A 1.6 1.6 0 0 0 334.60001 122.9999 A 1.6 1.6 0 0 0 333.00011 121.4 z M 335.99992 140.67996 A 0.55000001 0.55000001 0 0 0 335.45009 141.2298 A 0.55000001 0.55000001 0 0 0 335.99992 141.78015 A 0.55000001 0.55000001 0 0 0 336.54976 141.2298 A 0.55000001 0.55000001 0 0 0 335.99992 140.67996 z M 320.9998 142.30002 A 0.2 0.2 0 0 0 320.79982 142.5 A 0.2 0.2 0 0 0 320.9998 142.69999 A 0.2 0.2 0 0 0 321.19979 142.5 A 0.2 0.2 0 0 0 320.9998 142.30002 z M 335.99992 143.21986 A 0.55000001 0.55000001 0 0 0 335.45009 143.77021 A 0.55000001 0.55000001 0 0 0 335.99992 144.32005 A 0.55000001 0.55000001 0 0 0 336.54976 143.77021 A 0.55000001 0.55000001 0 0 0 335.99992 143.21986 z M 293.9999 160.4002 A 1.6 1.6 0 0 0 292.4 162.00011 A 1.6 1.6 0 0 0 293.9999 163.60001 A 1.6 1.6 0 0 0 295.5998 162.00011 A 1.6 1.6 0 0 0 293.9999 160.4002 z M 333.00011 160.4002 A 1.6 1.6 0 0 0 331.4002 162.00011 A 1.6 1.6 0 0 0 333.00011 163.60001 A 1.6 1.6 0 0 0 334.60001 162.00011 A 1.6 1.6 0 0 0 333.00011 160.4002 z "
+         style="fill:#000000" />
+    </g>
+    <g
+       style="fill:#d0d2cd;fill-opacity:1;stroke:none"
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+    <g
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+       style="fill:#c83434;fill-opacity:1;stroke:none"
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+       style="fill:#c83434;fill-opacity:1;stroke:none"
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+    <g
+       style="fill:none;stroke:#c83434;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;stroke-opacity:1"
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+       transform="translate(-292.4,-121.4)" />
+    <g
+       style="fill:none;stroke:#c83434;stroke-width:0.8;stroke-linecap:round;stroke-linejoin:round;stroke-opacity:1"
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+       transform="translate(-292.4,-121.4)" />
+    <g
+       style="fill:#ffffff;fill-opacity:1;stroke:none"
+       id="g2970"
+       transform="translate(-292.4,-121.4)" />
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+       transform="translate(-292.4,-121.4)" />
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+       transform="translate(-292.4,-121.4)" />
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+       transform="translate(-292.4,-121.4)" />
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+       style="fill:#ffffff;fill-opacity:1;stroke:none"
+       id="g3019"
+       transform="translate(-292.4,-121.4)" />
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+       style="fill:#ffffff;fill-opacity:1;stroke:none"
+       id="g3020"
+       transform="translate(-292.4,-121.4)" />
+  </g>
+</svg>

twisted_coil_gen_twolayer.py

@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 
+import warnings
 import subprocess
 import sys
 import math
@@ -605,6 +606,8 @@ def print_valid_twists(ctx, param, value):
 @click.option('--outer-diameter', type=float, default=50, help='Outer diameter [mm]')
 @click.option('--svg-out', type=click.Path(writable=True, dir_okay=False, path_type=Path), help='Filename to output SVG illustration of the coil to')
 @click.option('--inner-diameter', type=float, default=25, help='Inner diameter [mm]')
+@click.option('--stagger-inner-vias/--no-stagger-inner-vias', default=False, help='Stagger inner via ring')
+@click.option('--stagger-outer-vias/--no-stagger-outer-vias', default=False, help='Stagger outer via ring')
 @click.option('--trace-width', type=float, default=None)
 @click.option('--via-diameter', type=float, default=0.6)
 @click.option('--two-layer/--single-layer', default=True)
@@ -617,7 +620,6 @@ def print_valid_twists(ctx, param, value):
 @click.option('--twists', type=int, default=1, help='Number of twists per revolution. Note that this number must be co-prime to the number of turns. Run with --show-twists to list valid values. (default: 1)')
 @click.option('--circle-segments', type=int, default=64, help='When not using arcs, the number of points to use for arc interpolation per 360 degrees.')
 @click.option('--show-twists', callback=print_valid_twists, expose_value=False, type=int, is_eager=True, help='Calculate and show valid --twists counts for the given number of turns. Takes the number of turns as a value.')
-@click.option('--close-loop', is_flag=True, help='Close coil loop for simulation meshes')
 @click.option('--clearance', type=float, default=None)
 @click.option('--arc-tolerance', type=float, default=0.02)
 @click.option('--mesh-split-out', type=click.Path(writable=True, dir_okay=False, path_type=Path))
@@ -635,7 +637,7 @@ def generate(outfile, turns, outer_diameter, inner_diameter, via_diameter, via_d
              footprint_name, layer_pair, twists, clipboard, counter_clockwise, keepout_zone, keepout_margin,
              arc_tolerance, pcb, mesh_out, magneticalc_out, circle_segments, mesh_split_out, copper_thickness,
              board_thickness, mesh_mutual_out, mutual_offset_x, mutual_offset_y, mutual_offset_z, mutual_rotation_z,
-             two_layer, svg_out, close_loop):
+             two_layer, svg_out, stagger_inner_vias, stagger_outer_vias):
 
     if 'WAYLAND_DISPLAY' in os.environ:
         copy, paste, cliputil = ['wl-copy'], ['wl-paste'], 'xclip'
@@ -643,7 +645,10 @@ def generate(outfile, turns, outer_diameter, inner_diameter, via_diameter, via_d
         copy, paste, cliputil = ['xclip', '-i', '-sel', 'clipboard'], ['xclip', '-o', '-sel' 'clipboard'], 'wl-clipboard'
 
     if gcd(twists, turns) != 1:
-        raise click.ClickException('For the geometry to work out, the --twists parameter must be co-prime to --turns, i.e. the two must have 1 as their greatest common divisor. You can print valid values for --twists by running this command with --show-twists [turns number].')
+        raise click.ClickException(f'For the geometry to work out, the --twists parameter must be co-prime to --turns, i.e. the two must have 1 as their greatest common divisor. You can print valid values for --twists by running this command with --show-twists [turns number]. Right now, both are divisible by {gcd(twists, turns)}.')
+
+    if (stagger_inner_vias or stagger_outer_vias) and twists%2 != 0:
+        raise click.ClickException('For --stagger-inner/outer-vias to work, --twists must be even and --turns must be odd.')
 
     if (mesh_out or mesh_split_out or mesh_mutual_out) and not pcb:
         raise click.ClickException('--pcb is required when --mesh-out, --mesh-mutual-out or --mesh-split-out are used.')
@@ -708,9 +713,9 @@ def generate(outfile, turns, outer_diameter, inner_diameter, via_diameter, via_d
     print(f'    {degrees(outer_via_angle):.1f} deg / via', file=sys.stderr)
 
     # Check if the vias of the inner ring are so large that they would overlap
-    if inner_via_angle*twists > 2*pi:
-        min_dia = 2*((via_diameter + clearance) / (2*sin(pi / twists)) + via_offset)
-        raise click.ClickException(f'Error: Overlapping vias in inner via ring. Calculated minimum inner diameter is {min_dia:.2f} mm.')
+    if inner_via_angle*twists > (4*pi if stagger_inner_vias else 2*pi):
+        min_dia = 2*((via_diameter + clearance) / (2*sin(pi / twists * (2 if stagger_inner_vias else 1))) + via_offset)
+        warnings.warn(f'Overlapping vias in inner via ring. Calculated minimum inner diameter is {min_dia:.2f} mm.')
 
     pitch = clearance + trace_width
     t, _, b = layer_pair.partition(',')
@@ -862,7 +867,7 @@ def generate(outfile, turns, outer_diameter, inner_diameter, via_diameter, via_d
         x = inverse[i]*floor(2*sweeping_angle / (2*pi)) * 2*pi
         (x0, y0), (xn, yn), clen = do_spiral(0, outer_radius, inner_radius, start_angle, fold_angle, (x + start_angle)/total_angle, (x + fold_angle)/total_angle, circle_segments)
         if two_layer:
-            do_spiral(1, inner_radius, outer_radius, fold_angle, end_angle, (x + fold_angle)/total_angle, (x + end_angle)/total_angle)
+            do_spiral(1, inner_radius, outer_radius, fold_angle, end_angle, (x + fold_angle)/total_angle, (x + end_angle)/total_angle, circle_segments)
         else:
             dr = outer_radius - inner_radius
             xq = xn + cos(fold_angle) * dr
@@ -875,7 +880,11 @@ def generate(outfile, turns, outer_diameter, inner_diameter, via_diameter, via_d
             path.move(xn, yn)
             path.line(xq, yq)
 
-        xv, yv = inner_via_ring_radius*cos(fold_angle), inner_via_ring_radius*sin(fold_angle)
+        r = inner_via_ring_radius
+        if stagger_inner_vias:
+            if i%2 != 0:
+                r -= 2*via_offset
+        xv, yv = r*cos(fold_angle), r*sin(fold_angle)
         pads.append(make_via(xv, yv, layer_pair))
         if not isclose(via_offset, 0, abs_tol=1e-6):
             lines.append(make_line(xn, yn, xv, yv, layer_pair[0]))
@@ -883,8 +892,12 @@ def generate(outfile, turns, outer_diameter, inner_diameter, via_diameter, via_d
         svg_vias.append(Tag('circle', cx=xv, cy=yv, r=via_diameter/2, stroke='none', fill='white'))
         svg_vias.append(Tag('circle', cx=xv, cy=yv, r=via_drill/2, stroke='none', fill='black'))
 
-        if i > 0 or close_loop:
-            xv, yv = outer_via_ring_radius*cos(start_angle), outer_via_ring_radius*sin(start_angle)
+        if i > 0:
+            r = outer_via_ring_radius
+            if stagger_outer_vias:
+                if i%2 != 0:
+                    r += 2*via_offset
+            xv, yv = r*cos(start_angle), r*sin(start_angle)
             pads.append(make_via(xv, yv, layer_pair))
             if not isclose(via_offset, 0, abs_tol=1e-6):
                 lines.append(make_line(x0, y0, xv, yv, layer_pair[0]))
@@ -892,7 +905,7 @@ def generate(outfile, turns, outer_diameter, inner_diameter, via_diameter, via_d
             svg_vias.append(Tag('circle', cx=xv, cy=yv, r=via_diameter/2, stroke='none', fill='white'))
             svg_vias.append(Tag('circle', cx=xv, cy=yv, r=via_drill/2, stroke='none', fill='black'))
 
-    l_total = clen*twists*2
+    l_total = clen*twists*(2 if two_layer else 1)
     print(f'Approximate track length: {l_total:.2f} mm', file=sys.stderr)
     A = copper_thickness/1e3 * trace_width/1e3
     rho = 1.68e-8

wide_coil_1.kicad_prl

@@ -0,0 +1,136 @@
+{
+  "board": {
+    "active_layer": 0,
+    "active_layer_preset": "All Layers",
+    "auto_track_width": true,
+    "hidden_netclasses": [],
+    "hidden_nets": [],
+    "high_contrast_mode": 0,
+    "net_color_mode": 1,
+    "opacity": {
+      "images": 0.6,
+      "pads": 1.0,
+      "shapes": 1.0,
+      "tracks": 1.0,
+      "vias": 1.0,
+      "zones": 0.6
+    },
+    "selection_filter": {
+      "dimensions": true,
+      "footprints": true,
+      "graphics": true,
+      "keepouts": true,
+      "lockedItems": false,
+      "otherItems": true,
+      "pads": true,
+      "text": true,
+      "tracks": true,
+      "vias": true,
+      "zones": true
+    },
+    "visible_items": [
+      0,
+      1,
+      2,
+      3,
+      4,
+      5,
+      8,
+      9,
+      10,
+      11,
+      12,
+      13,
+      15,
+      16,
+      17,
+      18,
+      19,
+      20,
+      21,
+      22,
+      23,
+      24,
+      25,
+      26,
+      27,
+      28,
+      29,
+      30,
+      32,
+      33,
+      34,
+      35,
+      36,
+      39,
+      40,
+      41
+    ],
+    "visible_layers": "ffffffff_ffffffff",
+    "zone_display_mode": 0
+  },
+  "git": {
+    "repo_password": "",
+    "repo_type": "",
+    "repo_username": "",
+    "ssh_key": ""
+  },
+  "meta": {
+    "filename": "wide_coil_1.kicad_prl",
+    "version": 4
+  },
+  "net_inspector_panel": {
+    "col_hidden": [
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false
+    ],
+    "col_order": [
+      0,
+      1,
+      2,
+      3,
+      4,
+      5,
+      6,
+      7,
+      8,
+      9
+    ],
+    "col_widths": [],
+    "custom_group_rules": [],
+    "expanded_rows": [],
+    "filter_by_net_name": true,
+    "filter_by_netclass": true,
+    "filter_text": "",
+    "group_by_constraint": false,
+    "group_by_netclass": false,
+    "show_unconnected_nets": false,
+    "show_zero_pad_nets": false,
+    "sort_ascending": true,
+    "sorting_column": -1
+  },
+  "project": {
+    "files": []
+  },
+  "schematic": {
+    "selection_filter": {
+      "graphics": true,
+      "images": true,
+      "labels": true,
+      "lockedItems": false,
+      "otherItems": true,
+      "pins": true,
+      "symbols": true,
+      "text": true,
+      "wires": true
+    }
+  }
+}

wide_coil_1.kicad_pro

@@ -0,0 +1,276 @@
+{
+  "board": {
+    "3dviewports": [],
+    "design_settings": {
+      "defaults": {
+        "apply_defaults_to_fp_fields": false,
+        "apply_defaults_to_fp_shapes": false,
+        "apply_defaults_to_fp_text": false,
+        "board_outline_line_width": 0.05,
+        "copper_line_width": 0.2,
+        "copper_text_italic": false,
+        "copper_text_size_h": 1.5,
+        "copper_text_size_v": 1.5,
+        "copper_text_thickness": 0.3,
+        "copper_text_upright": false,
+        "courtyard_line_width": 0.05,
+        "dimension_precision": 4,
+        "dimension_units": 3,
+        "dimensions": {
+          "arrow_length": 1270000,
+          "extension_offset": 500000,
+          "keep_text_aligned": true,
+          "suppress_zeroes": false,
+          "text_position": 0,
+          "units_format": 1
+        },
+        "fab_line_width": 0.1,
+        "fab_text_italic": false,
+        "fab_text_size_h": 1.0,
+        "fab_text_size_v": 1.0,
+        "fab_text_thickness": 0.15,
+        "fab_text_upright": false,
+        "other_line_width": 0.1,
+        "other_text_italic": false,
+        "other_text_size_h": 1.0,
+        "other_text_size_v": 1.0,
+        "other_text_thickness": 0.15,
+        "other_text_upright": false,
+        "pads": {
+          "drill": 0.8,
+          "height": 1.27,
+          "width": 2.54
+        },
+        "silk_line_width": 0.1,
+        "silk_text_italic": false,
+        "silk_text_size_h": 1.0,
+        "silk_text_size_v": 1.0,
+        "silk_text_thickness": 0.1,
+        "silk_text_upright": false,
+        "zones": {
+          "min_clearance": 0.5
+        }
+      },
+      "diff_pair_dimensions": [],
+      "drc_exclusions": [],
+      "meta": {
+        "version": 2
+      },
+      "rule_severities": {
+        "annular_width": "error",
+        "clearance": "error",
+        "connection_width": "warning",
+        "copper_edge_clearance": "error",
+        "copper_sliver": "warning",
+        "courtyards_overlap": "error",
+        "diff_pair_gap_out_of_range": "error",
+        "diff_pair_uncoupled_length_too_long": "error",
+        "drill_out_of_range": "error",
+        "duplicate_footprints": "warning",
+        "extra_footprint": "warning",
+        "footprint": "error",
+        "footprint_filters_mismatch": "ignore",
+        "footprint_symbol_mismatch": "warning",
+        "footprint_type_mismatch": "ignore",
+        "hole_clearance": "error",
+        "hole_to_hole": "warning",
+        "holes_co_located": "warning",
+        "invalid_outline": "error",
+        "isolated_copper": "warning",
+        "item_on_disabled_layer": "error",
+        "items_not_allowed": "error",
+        "length_out_of_range": "error",
+        "lib_footprint_issues": "warning",
+        "lib_footprint_mismatch": "warning",
+        "malformed_courtyard": "error",
+        "microvia_drill_out_of_range": "error",
+        "missing_courtyard": "ignore",
+        "missing_footprint": "warning",
+        "net_conflict": "warning",
+        "npth_inside_courtyard": "ignore",
+        "padstack": "warning",
+        "pth_inside_courtyard": "ignore",
+        "shorting_items": "error",
+        "silk_edge_clearance": "warning",
+        "silk_over_copper": "warning",
+        "silk_overlap": "warning",
+        "skew_out_of_range": "error",
+        "solder_mask_bridge": "error",
+        "starved_thermal": "error",
+        "text_height": "warning",
+        "text_thickness": "warning",
+        "through_hole_pad_without_hole": "error",
+        "too_many_vias": "error",
+        "track_dangling": "warning",
+        "track_width": "error",
+        "tracks_crossing": "error",
+        "unconnected_items": "error",
+        "unresolved_variable": "error",
+        "via_dangling": "warning",
+        "zones_intersect": "error"
+      },
+      "rules": {
+        "max_error": 0.005,
+        "min_clearance": 0.0,
+        "min_connection": 0.0,
+        "min_copper_edge_clearance": 0.5,
+        "min_hole_clearance": 0.25,
+        "min_hole_to_hole": 0.25,
+        "min_microvia_diameter": 0.2,
+        "min_microvia_drill": 0.1,
+        "min_resolved_spokes": 2,
+        "min_silk_clearance": 0.0,
+        "min_text_height": 0.8,
+        "min_text_thickness": 0.08,
+        "min_through_hole_diameter": 0.3,
+        "min_track_width": 0.0,
+        "min_via_annular_width": 0.1,
+        "min_via_diameter": 0.5,
+        "solder_mask_to_copper_clearance": 0.0,
+        "use_height_for_length_calcs": true
+      },
+      "teardrop_options": [
+        {
+          "td_onpadsmd": true,
+          "td_onroundshapesonly": false,
+          "td_ontrackend": false,
+          "td_onviapad": true
+        }
+      ],
+      "teardrop_parameters": [
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_round_shape",
+          "td_width_to_size_filter_ratio": 0.9
+        },
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_rect_shape",
+          "td_width_to_size_filter_ratio": 0.9
+        },
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_track_end",
+          "td_width_to_size_filter_ratio": 0.9
+        }
+      ],
+      "track_widths": [],
+      "tuning_pattern_settings": {
+        "diff_pair_defaults": {
+          "corner_radius_percentage": 80,
+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 1.0
+        },
+        "diff_pair_skew_defaults": {
+          "corner_radius_percentage": 80,
+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 0.6
+        },
+        "single_track_defaults": {
+          "corner_radius_percentage": 80,
+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 0.6
+        }
+      },
+      "via_dimensions": [],
+      "zones_allow_external_fillets": false
+    },
+    "ipc2581": {
+      "dist": "",
+      "distpn": "",
+      "internal_id": "",
+      "mfg": "",
+      "mpn": ""
+    },
+    "layer_pairs": [],
+    "layer_presets": [],
+    "viewports": []
+  },
+  "boards": [],
+  "cvpcb": {
+    "equivalence_files": []
+  },
+  "libraries": {
+    "pinned_footprint_libs": [],
+    "pinned_symbol_libs": []
+  },
+  "meta": {
+    "filename": "wide_coil_1.kicad_pro",
+    "version": 1
+  },
+  "net_settings": {
+    "classes": [
+      {
+        "bus_width": 12,
+        "clearance": 0.2,
+        "diff_pair_gap": 0.25,
+        "diff_pair_via_gap": 0.25,
+        "diff_pair_width": 0.2,
+        "line_style": 0,
+        "microvia_diameter": 0.3,
+        "microvia_drill": 0.1,
+        "name": "Default",
+        "pcb_color": "rgba(0, 0, 0, 0.000)",
+        "priority": -1,
+        "schematic_color": "rgba(0, 0, 0, 0.000)",
+        "track_width": 0.2,
+        "via_diameter": 0.6,
+        "via_drill": 0.3,
+        "wire_width": 6
+      }
+    ],
+    "meta": {
+      "version": 4
+    },
+    "net_colors": null,
+    "netclass_assignments": null,
+    "netclass_patterns": []
+  },
+  "pcbnew": {
+    "last_paths": {
+      "gencad": "",
+      "idf": "",
+      "netlist": "",
+      "plot": "gerber_wide_1",
+      "pos_files": "",
+      "specctra_dsn": "",
+      "step": "",
+      "svg": "",
+      "vrml": ""
+    },
+    "page_layout_descr_file": ""
+  },
+  "schematic": {
+    "legacy_lib_dir": "",
+    "legacy_lib_list": []
+  },
+  "sheets": [],
+  "text_variables": {}
+}

wide_coil_2.kicad_prl

@@ -0,0 +1,136 @@
+{
+  "board": {
+    "active_layer": 0,
+    "active_layer_preset": "All Layers",
+    "auto_track_width": true,
+    "hidden_netclasses": [],
+    "hidden_nets": [],
+    "high_contrast_mode": 0,
+    "net_color_mode": 1,
+    "opacity": {
+      "images": 0.6,
+      "pads": 1.0,
+      "shapes": 1.0,
+      "tracks": 1.0,
+      "vias": 1.0,
+      "zones": 0.6
+    },
+    "selection_filter": {
+      "dimensions": true,
+      "footprints": true,
+      "graphics": true,
+      "keepouts": true,
+      "lockedItems": false,
+      "otherItems": true,
+      "pads": true,
+      "text": true,
+      "tracks": true,
+      "vias": true,
+      "zones": true
+    },
+    "visible_items": [
+      0,
+      1,
+      2,
+      3,
+      4,
+      5,
+      8,
+      9,
+      10,
+      11,
+      12,
+      13,
+      15,
+      16,
+      17,
+      18,
+      19,
+      20,
+      21,
+      22,
+      23,
+      24,
+      25,
+      26,
+      27,
+      28,
+      29,
+      30,
+      32,
+      33,
+      34,
+      35,
+      36,
+      39,
+      40,
+      41
+    ],
+    "visible_layers": "ffffffff_ffffffff",
+    "zone_display_mode": 0
+  },
+  "git": {
+    "repo_password": "",
+    "repo_type": "",
+    "repo_username": "",
+    "ssh_key": ""
+  },
+  "meta": {
+    "filename": "wide_coil_2.kicad_prl",
+    "version": 4
+  },
+  "net_inspector_panel": {
+    "col_hidden": [
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false
+    ],
+    "col_order": [
+      0,
+      1,
+      2,
+      3,
+      4,
+      5,
+      6,
+      7,
+      8,
+      9
+    ],
+    "col_widths": [],
+    "custom_group_rules": [],
+    "expanded_rows": [],
+    "filter_by_net_name": true,
+    "filter_by_netclass": true,
+    "filter_text": "",
+    "group_by_constraint": false,
+    "group_by_netclass": false,
+    "show_unconnected_nets": false,
+    "show_zero_pad_nets": false,
+    "sort_ascending": true,
+    "sorting_column": -1
+  },
+  "project": {
+    "files": []
+  },
+  "schematic": {
+    "selection_filter": {
+      "graphics": true,
+      "images": true,
+      "labels": true,
+      "lockedItems": false,
+      "otherItems": true,
+      "pins": true,
+      "symbols": true,
+      "text": true,
+      "wires": true
+    }
+  }
+}

wide_coil_2.kicad_pro

@@ -0,0 +1,276 @@
+{
+  "board": {
+    "3dviewports": [],
+    "design_settings": {
+      "defaults": {
+        "apply_defaults_to_fp_fields": false,
+        "apply_defaults_to_fp_shapes": false,
+        "apply_defaults_to_fp_text": false,
+        "board_outline_line_width": 0.05,
+        "copper_line_width": 0.2,
+        "copper_text_italic": false,
+        "copper_text_size_h": 1.5,
+        "copper_text_size_v": 1.5,
+        "copper_text_thickness": 0.3,
+        "copper_text_upright": false,
+        "courtyard_line_width": 0.05,
+        "dimension_precision": 4,
+        "dimension_units": 3,
+        "dimensions": {
+          "arrow_length": 1270000,
+          "extension_offset": 500000,
+          "keep_text_aligned": true,
+          "suppress_zeroes": false,
+          "text_position": 0,
+          "units_format": 1
+        },
+        "fab_line_width": 0.1,
+        "fab_text_italic": false,
+        "fab_text_size_h": 1.0,
+        "fab_text_size_v": 1.0,
+        "fab_text_thickness": 0.15,
+        "fab_text_upright": false,
+        "other_line_width": 0.1,
+        "other_text_italic": false,
+        "other_text_size_h": 1.0,
+        "other_text_size_v": 1.0,
+        "other_text_thickness": 0.15,
+        "other_text_upright": false,
+        "pads": {
+          "drill": 0.8,
+          "height": 1.27,
+          "width": 2.54
+        },
+        "silk_line_width": 0.1,
+        "silk_text_italic": false,
+        "silk_text_size_h": 1.0,
+        "silk_text_size_v": 1.0,
+        "silk_text_thickness": 0.1,
+        "silk_text_upright": false,
+        "zones": {
+          "min_clearance": 0.5
+        }
+      },
+      "diff_pair_dimensions": [],
+      "drc_exclusions": [],
+      "meta": {
+        "version": 2
+      },
+      "rule_severities": {
+        "annular_width": "error",
+        "clearance": "error",
+        "connection_width": "warning",
+        "copper_edge_clearance": "error",
+        "copper_sliver": "warning",
+        "courtyards_overlap": "error",
+        "diff_pair_gap_out_of_range": "error",
+        "diff_pair_uncoupled_length_too_long": "error",
+        "drill_out_of_range": "error",
+        "duplicate_footprints": "warning",
+        "extra_footprint": "warning",
+        "footprint": "error",
+        "footprint_filters_mismatch": "ignore",
+        "footprint_symbol_mismatch": "warning",
+        "footprint_type_mismatch": "ignore",
+        "hole_clearance": "error",
+        "hole_to_hole": "warning",
+        "holes_co_located": "warning",
+        "invalid_outline": "error",
+        "isolated_copper": "warning",
+        "item_on_disabled_layer": "error",
+        "items_not_allowed": "error",
+        "length_out_of_range": "error",
+        "lib_footprint_issues": "warning",
+        "lib_footprint_mismatch": "warning",
+        "malformed_courtyard": "error",
+        "microvia_drill_out_of_range": "error",
+        "missing_courtyard": "ignore",
+        "missing_footprint": "warning",
+        "net_conflict": "warning",
+        "npth_inside_courtyard": "ignore",
+        "padstack": "warning",
+        "pth_inside_courtyard": "ignore",
+        "shorting_items": "error",
+        "silk_edge_clearance": "warning",
+        "silk_over_copper": "warning",
+        "silk_overlap": "warning",
+        "skew_out_of_range": "error",
+        "solder_mask_bridge": "error",
+        "starved_thermal": "error",
+        "text_height": "warning",
+        "text_thickness": "warning",
+        "through_hole_pad_without_hole": "error",
+        "too_many_vias": "error",
+        "track_dangling": "warning",
+        "track_width": "error",
+        "tracks_crossing": "error",
+        "unconnected_items": "error",
+        "unresolved_variable": "error",
+        "via_dangling": "warning",
+        "zones_intersect": "error"
+      },
+      "rules": {
+        "max_error": 0.005,
+        "min_clearance": 0.0,
+        "min_connection": 0.0,
+        "min_copper_edge_clearance": 0.5,
+        "min_hole_clearance": 0.25,
+        "min_hole_to_hole": 0.25,
+        "min_microvia_diameter": 0.2,
+        "min_microvia_drill": 0.1,
+        "min_resolved_spokes": 2,
+        "min_silk_clearance": 0.0,
+        "min_text_height": 0.8,
+        "min_text_thickness": 0.08,
+        "min_through_hole_diameter": 0.3,
+        "min_track_width": 0.0,
+        "min_via_annular_width": 0.1,
+        "min_via_diameter": 0.5,
+        "solder_mask_to_copper_clearance": 0.0,
+        "use_height_for_length_calcs": true
+      },
+      "teardrop_options": [
+        {
+          "td_onpadsmd": true,
+          "td_onroundshapesonly": false,
+          "td_ontrackend": false,
+          "td_onviapad": true
+        }
+      ],
+      "teardrop_parameters": [
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_round_shape",
+          "td_width_to_size_filter_ratio": 0.9
+        },
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_rect_shape",
+          "td_width_to_size_filter_ratio": 0.9
+        },
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_track_end",
+          "td_width_to_size_filter_ratio": 0.9
+        }
+      ],
+      "track_widths": [],
+      "tuning_pattern_settings": {
+        "diff_pair_defaults": {
+          "corner_radius_percentage": 80,
+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 1.0
+        },
+        "diff_pair_skew_defaults": {
+          "corner_radius_percentage": 80,
+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 0.6
+        },
+        "single_track_defaults": {
+          "corner_radius_percentage": 80,
+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 0.6
+        }
+      },
+      "via_dimensions": [],
+      "zones_allow_external_fillets": false
+    },
+    "ipc2581": {
+      "dist": "",
+      "distpn": "",
+      "internal_id": "",
+      "mfg": "",
+      "mpn": ""
+    },
+    "layer_pairs": [],
+    "layer_presets": [],
+    "viewports": []
+  },
+  "boards": [],
+  "cvpcb": {
+    "equivalence_files": []
+  },
+  "libraries": {
+    "pinned_footprint_libs": [],
+    "pinned_symbol_libs": []
+  },
+  "meta": {
+    "filename": "wide_coil_2.kicad_pro",
+    "version": 1
+  },
+  "net_settings": {
+    "classes": [
+      {
+        "bus_width": 12,
+        "clearance": 0.2,
+        "diff_pair_gap": 0.25,
+        "diff_pair_via_gap": 0.25,
+        "diff_pair_width": 0.2,
+        "line_style": 0,
+        "microvia_diameter": 0.3,
+        "microvia_drill": 0.1,
+        "name": "Default",
+        "pcb_color": "rgba(0, 0, 0, 0.000)",
+        "priority": -1,
+        "schematic_color": "rgba(0, 0, 0, 0.000)",
+        "track_width": 0.2,
+        "via_diameter": 0.6,
+        "via_drill": 0.3,
+        "wire_width": 6
+      }
+    ],
+    "meta": {
+      "version": 4
+    },
+    "net_colors": null,
+    "netclass_assignments": null,
+    "netclass_patterns": []
+  },
+  "pcbnew": {
+    "last_paths": {
+      "gencad": "",
+      "idf": "",
+      "netlist": "",
+      "plot": "gerber_wide_2",
+      "pos_files": "",
+      "specctra_dsn": "",
+      "step": "",
+      "svg": "",
+      "vrml": ""
+    },
+    "page_layout_descr_file": ""
+  },
+  "schematic": {
+    "legacy_lib_dir": "",
+    "legacy_lib_list": []
+  },
+  "sheets": [],
+  "text_variables": {}
+}

wide_coil_3.kicad_prl

@@ -0,0 +1,136 @@
+{
+  "board": {
+    "active_layer": 0,
+    "active_layer_preset": "All Layers",
+    "auto_track_width": true,
+    "hidden_netclasses": [],
+    "hidden_nets": [],
+    "high_contrast_mode": 0,
+    "net_color_mode": 1,
+    "opacity": {
+      "images": 0.6,
+      "pads": 1.0,
+      "shapes": 1.0,
+      "tracks": 1.0,
+      "vias": 1.0,
+      "zones": 0.6
+    },
+    "selection_filter": {
+      "dimensions": true,
+      "footprints": true,
+      "graphics": true,
+      "keepouts": true,
+      "lockedItems": false,
+      "otherItems": true,
+      "pads": true,
+      "text": true,
+      "tracks": true,
+      "vias": true,
+      "zones": true
+    },
+    "visible_items": [
+      0,
+      1,
+      2,
+      3,
+      4,
+      5,
+      8,
+      9,
+      10,
+      11,
+      12,
+      13,
+      15,
+      16,
+      17,
+      18,
+      19,
+      20,
+      21,
+      22,
+      23,
+      24,
+      25,
+      26,
+      27,
+      28,
+      29,
+      30,
+      32,
+      33,
+      34,
+      35,
+      36,
+      39,
+      40,
+      41
+    ],
+    "visible_layers": "ffffffff_ffffffff",
+    "zone_display_mode": 0
+  },
+  "git": {
+    "repo_password": "",
+    "repo_type": "",
+    "repo_username": "",
+    "ssh_key": ""
+  },
+  "meta": {
+    "filename": "wide_coil_3.kicad_prl",
+    "version": 4
+  },
+  "net_inspector_panel": {
+    "col_hidden": [
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false
+    ],
+    "col_order": [
+      0,
+      1,
+      2,
+      3,
+      4,
+      5,
+      6,
+      7,
+      8,
+      9
+    ],
+    "col_widths": [],
+    "custom_group_rules": [],
+    "expanded_rows": [],
+    "filter_by_net_name": true,
+    "filter_by_netclass": true,
+    "filter_text": "",
+    "group_by_constraint": false,
+    "group_by_netclass": false,
+    "show_unconnected_nets": false,
+    "show_zero_pad_nets": false,
+    "sort_ascending": true,
+    "sorting_column": -1
+  },
+  "project": {
+    "files": []
+  },
+  "schematic": {
+    "selection_filter": {
+      "graphics": true,
+      "images": true,
+      "labels": true,
+      "lockedItems": false,
+      "otherItems": true,
+      "pins": true,
+      "symbols": true,
+      "text": true,
+      "wires": true
+    }
+  }
+}

wide_coil_3.kicad_pro

@@ -0,0 +1,276 @@
+{
+  "board": {
+    "3dviewports": [],
+    "design_settings": {
+      "defaults": {
+        "apply_defaults_to_fp_fields": false,
+        "apply_defaults_to_fp_shapes": false,
+        "apply_defaults_to_fp_text": false,
+        "board_outline_line_width": 0.05,
+        "copper_line_width": 0.2,
+        "copper_text_italic": false,
+        "copper_text_size_h": 1.5,
+        "copper_text_size_v": 1.5,
+        "copper_text_thickness": 0.3,
+        "copper_text_upright": false,
+        "courtyard_line_width": 0.05,
+        "dimension_precision": 4,
+        "dimension_units": 3,
+        "dimensions": {
+          "arrow_length": 1270000,
+          "extension_offset": 500000,
+          "keep_text_aligned": true,
+          "suppress_zeroes": false,
+          "text_position": 0,
+          "units_format": 1
+        },
+        "fab_line_width": 0.1,
+        "fab_text_italic": false,
+        "fab_text_size_h": 1.0,
+        "fab_text_size_v": 1.0,
+        "fab_text_thickness": 0.15,
+        "fab_text_upright": false,
+        "other_line_width": 0.1,
+        "other_text_italic": false,
+        "other_text_size_h": 1.0,
+        "other_text_size_v": 1.0,
+        "other_text_thickness": 0.15,
+        "other_text_upright": false,
+        "pads": {
+          "drill": 0.8,
+          "height": 1.27,
+          "width": 2.54
+        },
+        "silk_line_width": 0.1,
+        "silk_text_italic": false,
+        "silk_text_size_h": 1.0,
+        "silk_text_size_v": 1.0,
+        "silk_text_thickness": 0.1,
+        "silk_text_upright": false,
+        "zones": {
+          "min_clearance": 0.5
+        }
+      },
+      "diff_pair_dimensions": [],
+      "drc_exclusions": [],
+      "meta": {
+        "version": 2
+      },
+      "rule_severities": {
+        "annular_width": "error",
+        "clearance": "error",
+        "connection_width": "warning",
+        "copper_edge_clearance": "error",
+        "copper_sliver": "warning",
+        "courtyards_overlap": "error",
+        "diff_pair_gap_out_of_range": "error",
+        "diff_pair_uncoupled_length_too_long": "error",
+        "drill_out_of_range": "error",
+        "duplicate_footprints": "warning",
+        "extra_footprint": "warning",
+        "footprint": "error",
+        "footprint_filters_mismatch": "ignore",
+        "footprint_symbol_mismatch": "warning",
+        "footprint_type_mismatch": "ignore",
+        "hole_clearance": "error",
+        "hole_to_hole": "warning",
+        "holes_co_located": "warning",
+        "invalid_outline": "error",
+        "isolated_copper": "warning",
+        "item_on_disabled_layer": "error",
+        "items_not_allowed": "error",
+        "length_out_of_range": "error",
+        "lib_footprint_issues": "warning",
+        "lib_footprint_mismatch": "warning",
+        "malformed_courtyard": "error",
+        "microvia_drill_out_of_range": "error",
+        "missing_courtyard": "ignore",
+        "missing_footprint": "warning",
+        "net_conflict": "warning",
+        "npth_inside_courtyard": "ignore",
+        "padstack": "warning",
+        "pth_inside_courtyard": "ignore",
+        "shorting_items": "error",
+        "silk_edge_clearance": "warning",
+        "silk_over_copper": "warning",
+        "silk_overlap": "warning",
+        "skew_out_of_range": "error",
+        "solder_mask_bridge": "error",
+        "starved_thermal": "error",
+        "text_height": "warning",
+        "text_thickness": "warning",
+        "through_hole_pad_without_hole": "error",
+        "too_many_vias": "error",
+        "track_dangling": "warning",
+        "track_width": "error",
+        "tracks_crossing": "error",
+        "unconnected_items": "error",
+        "unresolved_variable": "error",
+        "via_dangling": "warning",
+        "zones_intersect": "error"
+      },
+      "rules": {
+        "max_error": 0.005,
+        "min_clearance": 0.0,
+        "min_connection": 0.0,
+        "min_copper_edge_clearance": 0.5,
+        "min_hole_clearance": 0.25,
+        "min_hole_to_hole": 0.25,
+        "min_microvia_diameter": 0.2,
+        "min_microvia_drill": 0.1,
+        "min_resolved_spokes": 2,
+        "min_silk_clearance": 0.0,
+        "min_text_height": 0.8,
+        "min_text_thickness": 0.08,
+        "min_through_hole_diameter": 0.3,
+        "min_track_width": 0.0,
+        "min_via_annular_width": 0.1,
+        "min_via_diameter": 0.5,
+        "solder_mask_to_copper_clearance": 0.0,
+        "use_height_for_length_calcs": true
+      },
+      "teardrop_options": [
+        {
+          "td_onpadsmd": true,
+          "td_onroundshapesonly": false,
+          "td_ontrackend": false,
+          "td_onviapad": true
+        }
+      ],
+      "teardrop_parameters": [
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_round_shape",
+          "td_width_to_size_filter_ratio": 0.9
+        },
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_rect_shape",
+          "td_width_to_size_filter_ratio": 0.9
+        },
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_track_end",
+          "td_width_to_size_filter_ratio": 0.9
+        }
+      ],
+      "track_widths": [],
+      "tuning_pattern_settings": {
+        "diff_pair_defaults": {
+          "corner_radius_percentage": 80,
+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 1.0
+        },
+        "diff_pair_skew_defaults": {
+          "corner_radius_percentage": 80,
+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 0.6
+        },
+        "single_track_defaults": {
+          "corner_radius_percentage": 80,
+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 0.6
+        }
+      },
+      "via_dimensions": [],
+      "zones_allow_external_fillets": false
+    },
+    "ipc2581": {
+      "dist": "",
+      "distpn": "",
+      "internal_id": "",
+      "mfg": "",
+      "mpn": ""
+    },
+    "layer_pairs": [],
+    "layer_presets": [],
+    "viewports": []
+  },
+  "boards": [],
+  "cvpcb": {
+    "equivalence_files": []
+  },
+  "libraries": {
+    "pinned_footprint_libs": [],
+    "pinned_symbol_libs": []
+  },
+  "meta": {
+    "filename": "wide_coil_3.kicad_pro",
+    "version": 1
+  },
+  "net_settings": {
+    "classes": [
+      {
+        "bus_width": 12,
+        "clearance": 0.2,
+        "diff_pair_gap": 0.25,
+        "diff_pair_via_gap": 0.25,
+        "diff_pair_width": 0.2,
+        "line_style": 0,
+        "microvia_diameter": 0.3,
+        "microvia_drill": 0.1,
+        "name": "Default",
+        "pcb_color": "rgba(0, 0, 0, 0.000)",
+        "priority": -1,
+        "schematic_color": "rgba(0, 0, 0, 0.000)",
+        "track_width": 0.2,
+        "via_diameter": 0.6,
+        "via_drill": 0.3,
+        "wire_width": 6
+      }
+    ],
+    "meta": {
+      "version": 4
+    },
+    "net_colors": null,
+    "netclass_assignments": null,
+    "netclass_patterns": []
+  },
+  "pcbnew": {
+    "last_paths": {
+      "gencad": "",
+      "idf": "",
+      "netlist": "",
+      "plot": "gerber_wide_3",
+      "pos_files": "",
+      "specctra_dsn": "",
+      "step": "",
+      "svg": "",
+      "vrml": ""
+    },
+    "page_layout_descr_file": ""
+  },
+  "schematic": {
+    "legacy_lib_dir": "",
+    "legacy_lib_list": []
+  },
+  "sheets": [],
+  "text_variables": {}
+}

wide_coil_4.kicad_prl

@@ -0,0 +1,136 @@
+{
+  "board": {
+    "active_layer": 0,
+    "active_layer_preset": "All Layers",
+    "auto_track_width": true,
+    "hidden_netclasses": [],
+    "hidden_nets": [],
+    "high_contrast_mode": 0,
+    "net_color_mode": 1,
+    "opacity": {
+      "images": 0.6,
+      "pads": 1.0,
+      "shapes": 1.0,
+      "tracks": 1.0,
+      "vias": 1.0,
+      "zones": 0.6
+    },
+    "selection_filter": {
+      "dimensions": true,
+      "footprints": true,
+      "graphics": true,
+      "keepouts": true,
+      "lockedItems": false,
+      "otherItems": true,
+      "pads": true,
+      "text": true,
+      "tracks": true,
+      "vias": true,
+      "zones": true
+    },
+    "visible_items": [
+      0,
+      1,
+      2,
+      3,
+      4,
+      5,
+      8,
+      9,
+      10,
+      11,
+      12,
+      13,
+      15,
+      16,
+      17,
+      18,
+      19,
+      20,
+      21,
+      22,
+      23,
+      24,
+      25,
+      26,
+      27,
+      28,
+      29,
+      30,
+      32,
+      33,
+      34,
+      35,
+      36,
+      39,
+      40,
+      41
+    ],
+    "visible_layers": "ffffffff_ffffffff",
+    "zone_display_mode": 0
+  },
+  "git": {
+    "repo_password": "",
+    "repo_type": "",
+    "repo_username": "",
+    "ssh_key": ""
+  },
+  "meta": {
+    "filename": "wide_coil_4.kicad_prl",
+    "version": 4
+  },
+  "net_inspector_panel": {
+    "col_hidden": [
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false
+    ],
+    "col_order": [
+      0,
+      1,
+      2,
+      3,
+      4,
+      5,
+      6,
+      7,
+      8,
+      9
+    ],
+    "col_widths": [],
+    "custom_group_rules": [],
+    "expanded_rows": [],
+    "filter_by_net_name": true,
+    "filter_by_netclass": true,
+    "filter_text": "",
+    "group_by_constraint": false,
+    "group_by_netclass": false,
+    "show_unconnected_nets": false,
+    "show_zero_pad_nets": false,
+    "sort_ascending": true,
+    "sorting_column": -1
+  },
+  "project": {
+    "files": []
+  },
+  "schematic": {
+    "selection_filter": {
+      "graphics": true,
+      "images": true,
+      "labels": true,
+      "lockedItems": false,
+      "otherItems": true,
+      "pins": true,
+      "symbols": true,
+      "text": true,
+      "wires": true
+    }
+  }
+}

wide_coil_4.kicad_pro

@@ -0,0 +1,276 @@
+{
+  "board": {
+    "3dviewports": [],
+    "design_settings": {
+      "defaults": {
+        "apply_defaults_to_fp_fields": false,
+        "apply_defaults_to_fp_shapes": false,
+        "apply_defaults_to_fp_text": false,
+        "board_outline_line_width": 0.05,
+        "copper_line_width": 0.2,
+        "copper_text_italic": false,
+        "copper_text_size_h": 1.5,
+        "copper_text_size_v": 1.5,
+        "copper_text_thickness": 0.3,
+        "copper_text_upright": false,
+        "courtyard_line_width": 0.05,
+        "dimension_precision": 4,
+        "dimension_units": 3,
+        "dimensions": {
+          "arrow_length": 1270000,
+          "extension_offset": 500000,
+          "keep_text_aligned": true,
+          "suppress_zeroes": false,
+          "text_position": 0,
+          "units_format": 1
+        },
+        "fab_line_width": 0.1,
+        "fab_text_italic": false,
+        "fab_text_size_h": 1.0,
+        "fab_text_size_v": 1.0,
+        "fab_text_thickness": 0.15,
+        "fab_text_upright": false,
+        "other_line_width": 0.1,
+        "other_text_italic": false,
+        "other_text_size_h": 1.0,
+        "other_text_size_v": 1.0,
+        "other_text_thickness": 0.15,
+        "other_text_upright": false,
+        "pads": {
+          "drill": 0.8,
+          "height": 1.27,
+          "width": 2.54
+        },
+        "silk_line_width": 0.1,
+        "silk_text_italic": false,
+        "silk_text_size_h": 1.0,
+        "silk_text_size_v": 1.0,
+        "silk_text_thickness": 0.1,
+        "silk_text_upright": false,
+        "zones": {
+          "min_clearance": 0.5
+        }
+      },
+      "diff_pair_dimensions": [],
+      "drc_exclusions": [],
+      "meta": {
+        "version": 2
+      },
+      "rule_severities": {
+        "annular_width": "error",
+        "clearance": "error",
+        "connection_width": "warning",
+        "copper_edge_clearance": "error",
+        "copper_sliver": "warning",
+        "courtyards_overlap": "error",
+        "diff_pair_gap_out_of_range": "error",
+        "diff_pair_uncoupled_length_too_long": "error",
+        "drill_out_of_range": "error",
+        "duplicate_footprints": "warning",
+        "extra_footprint": "warning",
+        "footprint": "error",
+        "footprint_filters_mismatch": "ignore",
+        "footprint_symbol_mismatch": "warning",
+        "footprint_type_mismatch": "ignore",
+        "hole_clearance": "error",
+        "hole_to_hole": "warning",
+        "holes_co_located": "warning",
+        "invalid_outline": "error",
+        "isolated_copper": "warning",
+        "item_on_disabled_layer": "error",
+        "items_not_allowed": "error",
+        "length_out_of_range": "error",
+        "lib_footprint_issues": "warning",
+        "lib_footprint_mismatch": "warning",
+        "malformed_courtyard": "error",
+        "microvia_drill_out_of_range": "error",
+        "missing_courtyard": "ignore",
+        "missing_footprint": "warning",
+        "net_conflict": "warning",
+        "npth_inside_courtyard": "ignore",
+        "padstack": "warning",
+        "pth_inside_courtyard": "ignore",
+        "shorting_items": "error",
+        "silk_edge_clearance": "warning",
+        "silk_over_copper": "warning",
+        "silk_overlap": "warning",
+        "skew_out_of_range": "error",
+        "solder_mask_bridge": "error",
+        "starved_thermal": "error",
+        "text_height": "warning",
+        "text_thickness": "warning",
+        "through_hole_pad_without_hole": "error",
+        "too_many_vias": "error",
+        "track_dangling": "warning",
+        "track_width": "error",
+        "tracks_crossing": "error",
+        "unconnected_items": "error",
+        "unresolved_variable": "error",
+        "via_dangling": "warning",
+        "zones_intersect": "error"
+      },
+      "rules": {
+        "max_error": 0.005,
+        "min_clearance": 0.0,
+        "min_connection": 0.0,
+        "min_copper_edge_clearance": 0.5,
+        "min_hole_clearance": 0.25,
+        "min_hole_to_hole": 0.25,
+        "min_microvia_diameter": 0.2,
+        "min_microvia_drill": 0.1,
+        "min_resolved_spokes": 2,
+        "min_silk_clearance": 0.0,
+        "min_text_height": 0.8,
+        "min_text_thickness": 0.08,
+        "min_through_hole_diameter": 0.3,
+        "min_track_width": 0.0,
+        "min_via_annular_width": 0.1,
+        "min_via_diameter": 0.5,
+        "solder_mask_to_copper_clearance": 0.0,
+        "use_height_for_length_calcs": true
+      },
+      "teardrop_options": [
+        {
+          "td_onpadsmd": true,
+          "td_onroundshapesonly": false,
+          "td_ontrackend": false,
+          "td_onviapad": true
+        }
+      ],
+      "teardrop_parameters": [
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_round_shape",
+          "td_width_to_size_filter_ratio": 0.9
+        },
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_rect_shape",
+          "td_width_to_size_filter_ratio": 0.9
+        },
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_track_end",
+          "td_width_to_size_filter_ratio": 0.9
+        }
+      ],
+      "track_widths": [],
+      "tuning_pattern_settings": {
+        "diff_pair_defaults": {
+          "corner_radius_percentage": 80,
+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 1.0
+        },
+        "diff_pair_skew_defaults": {
+          "corner_radius_percentage": 80,
+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 0.6
+        },
+        "single_track_defaults": {
+          "corner_radius_percentage": 80,
+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 0.6
+        }
+      },
+      "via_dimensions": [],
+      "zones_allow_external_fillets": false
+    },
+    "ipc2581": {
+      "dist": "",
+      "distpn": "",
+      "internal_id": "",
+      "mfg": "",
+      "mpn": ""
+    },
+    "layer_pairs": [],
+    "layer_presets": [],
+    "viewports": []
+  },
+  "boards": [],
+  "cvpcb": {
+    "equivalence_files": []
+  },
+  "libraries": {
+    "pinned_footprint_libs": [],
+    "pinned_symbol_libs": []
+  },
+  "meta": {
+    "filename": "wide_coil_4.kicad_pro",
+    "version": 1
+  },
+  "net_settings": {
+    "classes": [
+      {
+        "bus_width": 12,
+        "clearance": 0.2,
+        "diff_pair_gap": 0.25,
+        "diff_pair_via_gap": 0.25,
+        "diff_pair_width": 0.2,
+        "line_style": 0,
+        "microvia_diameter": 0.3,
+        "microvia_drill": 0.1,
+        "name": "Default",
+        "pcb_color": "rgba(0, 0, 0, 0.000)",
+        "priority": -1,
+        "schematic_color": "rgba(0, 0, 0, 0.000)",
+        "track_width": 0.2,
+        "via_diameter": 0.6,
+        "via_drill": 0.3,
+        "wire_width": 6
+      }
+    ],
+    "meta": {
+      "version": 4
+    },
+    "net_colors": null,
+    "netclass_assignments": null,
+    "netclass_patterns": []
+  },
+  "pcbnew": {
+    "last_paths": {
+      "gencad": "",
+      "idf": "",
+      "netlist": "",
+      "plot": "gerber_wide_4",
+      "pos_files": "",
+      "specctra_dsn": "",
+      "step": "",
+      "svg": "",
+      "vrml": ""
+    },
+    "page_layout_descr_file": ""
+  },
+  "schematic": {
+    "legacy_lib_dir": "",
+    "legacy_lib_list": []
+  },
+  "sheets": [],
+  "text_variables": {}
+}

wide_coil_5.kicad_prl

@@ -0,0 +1,136 @@
+{
+  "board": {
+    "active_layer": 0,
+    "active_layer_preset": "All Layers",
+    "auto_track_width": true,
+    "hidden_netclasses": [],
+    "hidden_nets": [],
+    "high_contrast_mode": 0,
+    "net_color_mode": 1,
+    "opacity": {
+      "images": 0.6,
+      "pads": 1.0,
+      "shapes": 1.0,
+      "tracks": 1.0,
+      "vias": 1.0,
+      "zones": 0.6
+    },
+    "selection_filter": {
+      "dimensions": true,
+      "footprints": true,
+      "graphics": true,
+      "keepouts": true,
+      "lockedItems": false,
+      "otherItems": true,
+      "pads": true,
+      "text": true,
+      "tracks": true,
+      "vias": true,
+      "zones": true
+    },
+    "visible_items": [
+      0,
+      1,
+      2,
+      3,
+      4,
+      5,
+      8,
+      9,
+      10,
+      11,
+      12,
+      13,
+      15,
+      16,
+      17,
+      18,
+      19,
+      20,
+      21,
+      22,
+      23,
+      24,
+      25,
+      26,
+      27,
+      28,
+      29,
+      30,
+      32,
+      33,
+      34,
+      35,
+      36,
+      39,
+      40,
+      41
+    ],
+    "visible_layers": "ffffffff_ffffffff",
+    "zone_display_mode": 0
+  },
+  "git": {
+    "repo_password": "",
+    "repo_type": "",
+    "repo_username": "",
+    "ssh_key": ""
+  },
+  "meta": {
+    "filename": "wide_coil_5.kicad_prl",
+    "version": 4
+  },
+  "net_inspector_panel": {
+    "col_hidden": [
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false
+    ],
+    "col_order": [
+      0,
+      1,
+      2,
+      3,
+      4,
+      5,
+      6,
+      7,
+      8,
+      9
+    ],
+    "col_widths": [],
+    "custom_group_rules": [],
+    "expanded_rows": [],
+    "filter_by_net_name": true,
+    "filter_by_netclass": true,
+    "filter_text": "",
+    "group_by_constraint": false,
+    "group_by_netclass": false,
+    "show_unconnected_nets": false,
+    "show_zero_pad_nets": false,
+    "sort_ascending": true,
+    "sorting_column": -1
+  },
+  "project": {
+    "files": []
+  },
+  "schematic": {
+    "selection_filter": {
+      "graphics": true,
+      "images": true,
+      "labels": true,
+      "lockedItems": false,
+      "otherItems": true,
+      "pins": true,
+      "symbols": true,
+      "text": true,
+      "wires": true
+    }
+  }
+}

wide_coil_5.kicad_pro

@@ -0,0 +1,276 @@
+{
+  "board": {
+    "3dviewports": [],
+    "design_settings": {
+      "defaults": {
+        "apply_defaults_to_fp_fields": false,
+        "apply_defaults_to_fp_shapes": false,
+        "apply_defaults_to_fp_text": false,
+        "board_outline_line_width": 0.05,
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+          "height": 1.27,
+          "width": 2.54
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+        "silk_text_size_h": 1.0,
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+        }
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+      "drc_exclusions": [],
+      "meta": {
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+      },
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+        "clearance": "error",
+        "connection_width": "warning",
+        "copper_edge_clearance": "error",
+        "copper_sliver": "warning",
+        "courtyards_overlap": "error",
+        "diff_pair_gap_out_of_range": "error",
+        "diff_pair_uncoupled_length_too_long": "error",
+        "drill_out_of_range": "error",
+        "duplicate_footprints": "warning",
+        "extra_footprint": "warning",
+        "footprint": "error",
+        "footprint_filters_mismatch": "ignore",
+        "footprint_symbol_mismatch": "warning",
+        "footprint_type_mismatch": "ignore",
+        "hole_clearance": "error",
+        "hole_to_hole": "warning",
+        "holes_co_located": "warning",
+        "invalid_outline": "error",
+        "isolated_copper": "warning",
+        "item_on_disabled_layer": "error",
+        "items_not_allowed": "error",
+        "length_out_of_range": "error",
+        "lib_footprint_issues": "warning",
+        "lib_footprint_mismatch": "warning",
+        "malformed_courtyard": "error",
+        "microvia_drill_out_of_range": "error",
+        "missing_courtyard": "ignore",
+        "missing_footprint": "warning",
+        "net_conflict": "warning",
+        "npth_inside_courtyard": "ignore",
+        "padstack": "warning",
+        "pth_inside_courtyard": "ignore",
+        "shorting_items": "error",
+        "silk_edge_clearance": "warning",
+        "silk_over_copper": "warning",
+        "silk_overlap": "warning",
+        "skew_out_of_range": "error",
+        "solder_mask_bridge": "error",
+        "starved_thermal": "error",
+        "text_height": "warning",
+        "text_thickness": "warning",
+        "through_hole_pad_without_hole": "error",
+        "too_many_vias": "error",
+        "track_dangling": "warning",
+        "track_width": "error",
+        "tracks_crossing": "error",
+        "unconnected_items": "error",
+        "unresolved_variable": "error",
+        "via_dangling": "warning",
+        "zones_intersect": "error"
+      },
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+        "min_clearance": 0.0,
+        "min_connection": 0.0,
+        "min_copper_edge_clearance": 0.5,
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+        "min_microvia_drill": 0.1,
+        "min_resolved_spokes": 2,
+        "min_silk_clearance": 0.0,
+        "min_text_height": 0.8,
+        "min_text_thickness": 0.08,
+        "min_through_hole_diameter": 0.3,
+        "min_track_width": 0.0,
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+        "min_via_diameter": 0.5,
+        "solder_mask_to_copper_clearance": 0.0,
+        "use_height_for_length_calcs": true
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+          "td_onroundshapesonly": false,
+          "td_ontrackend": false,
+          "td_onviapad": true
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+          "td_length_ratio": 0.5,
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+          "td_target_name": "td_round_shape",
+          "td_width_to_size_filter_ratio": 0.9
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+          "td_target_name": "td_rect_shape",
+          "td_width_to_size_filter_ratio": 0.9
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+          "td_target_name": "td_track_end",
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+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 1.0
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+        "diff_pair_skew_defaults": {
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+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 0.6
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+        "single_track_defaults": {
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+          "corner_style": 1,
+          "max_amplitude": 1.0,
+          "min_amplitude": 0.2,
+          "single_sided": false,
+          "spacing": 0.6
+        }
+      },
+      "via_dimensions": [],
+      "zones_allow_external_fillets": false
+    },
+    "ipc2581": {
+      "dist": "",
+      "distpn": "",
+      "internal_id": "",
+      "mfg": "",
+      "mpn": ""
+    },
+    "layer_pairs": [],
+    "layer_presets": [],
+    "viewports": []
+  },
+  "boards": [],
+  "cvpcb": {
+    "equivalence_files": []
+  },
+  "libraries": {
+    "pinned_footprint_libs": [],
+    "pinned_symbol_libs": []
+  },
+  "meta": {
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+    "version": 1
+  },
+  "net_settings": {
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+        "clearance": 0.2,
+        "diff_pair_gap": 0.25,
+        "diff_pair_via_gap": 0.25,
+        "diff_pair_width": 0.2,
+        "line_style": 0,
+        "microvia_diameter": 0.3,
+        "microvia_drill": 0.1,
+        "name": "Default",
+        "pcb_color": "rgba(0, 0, 0, 0.000)",
+        "priority": -1,
+        "schematic_color": "rgba(0, 0, 0, 0.000)",
+        "track_width": 0.2,
+        "via_diameter": 0.6,
+        "via_drill": 0.3,
+        "wire_width": 6
+      }
+    ],
+    "meta": {
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+    },
+    "net_colors": null,
+    "netclass_assignments": null,
+    "netclass_patterns": []
+  },
+  "pcbnew": {
+    "last_paths": {
+      "gencad": "",
+      "idf": "",
+      "netlist": "",
+      "plot": "gerber_wide_5",
+      "pos_files": "",
+      "specctra_dsn": "",
+      "step": "",
+      "svg": "",
+      "vrml": ""
+    },
+    "page_layout_descr_file": ""
+  },
+  "schematic": {
+    "legacy_lib_dir": "",
+    "legacy_lib_list": []
+  },
+  "sheets": [],
+  "text_variables": {}
+}