Add panel-to-PCB mounting system with M3 standoffs

Panel alignment:
- PCB offset 10mm from panel top
- Component holes aligned: OLED@25mm, jacks@45mm, button@58mm
- 4x M3 standoff holes at corners (5,5), (35,5), (5,75), (35,75)

Updates:
- Panel SVG and spec aligned with PCB layout
- Mounting holes added to PCB (Edge.Cuts layer)
- Regenerated Gerbers with mounting holes
- Updated autoroute.py to add mounting holes automatically

DRC: 0 unconnected, 7 cosmetic errors (courtyard overlaps)

.gitignore

@@ -32,3 +32,9 @@ firmware/.pio/
 # OS
 .DS_Store
 Thumbs.db
+
+# Build artifacts
+*.dsn
+*.ses
+*.mgc
+DRC.rpt

hardware/kicad/gerbers/SN-L00-B_Cu.gbl

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hardware/kicad/gerbers/SN-L00-B_Mask.gbs

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hardware/kicad/gerbers/SN-L00-B_Paste.gbp

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hardware/kicad/gerbers/SN-L00-B_Silkscreen.gbo

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hardware/kicad/gerbers/SN-L00-Edge_Cuts.gm1

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hardware/kicad/gerbers/SN-L00-F_Cu.gtl

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 X31212500Y-48000000D02*
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 %TO.N,/SDA*%
 X18730000Y-32000000D02*
 X18730000Y-48030000D01*
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 X27620000Y-56920000D01*
 %TO.N,/RETURN_IN*%
-X27620000Y-64540000D02*
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 %TO.N,/BTN*%
 X4000000Y-81824100D02*
 X4000000Y-85175000D01*

hardware/kicad/gerbers/SN-L00-F_Mask.gts

@@ -1,12 +1,12 @@
 %TF.GenerationSoftware,KiCad,Pcbnew,9.0.2+dfsg-1*%
-%TF.CreationDate,2026-01-23T08:01:42+01:00*%
+%TF.CreationDate,2026-01-23T08:14:38+01:00*%
 %TF.ProjectId,SN-L00,534e2d4c-3030-42e6-9b69-6361645f7063,0.1*%
 %TF.SameCoordinates,Original*%
 %TF.FileFunction,Soldermask,Top*%
 %TF.FilePolarity,Negative*%
 %FSLAX46Y46*%
 G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
-G04 Created by KiCad (PCBNEW 9.0.2+dfsg-1) date 2026-01-23 08:01:42*
+G04 Created by KiCad (PCBNEW 9.0.2+dfsg-1) date 2026-01-23 08:14:38*
 %MOMM*%
 %LPD*%
 G01*

hardware/kicad/gerbers/SN-L00-F_Paste.gtp

@@ -1,12 +1,12 @@
 %TF.GenerationSoftware,KiCad,Pcbnew,9.0.2+dfsg-1*%
-%TF.CreationDate,2026-01-23T08:01:42+01:00*%
+%TF.CreationDate,2026-01-23T08:14:38+01:00*%
 %TF.ProjectId,SN-L00,534e2d4c-3030-42e6-9b69-6361645f7063,0.1*%
 %TF.SameCoordinates,Original*%
 %TF.FileFunction,Paste,Top*%
 %TF.FilePolarity,Positive*%
 %FSLAX46Y46*%
 G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
-G04 Created by KiCad (PCBNEW 9.0.2+dfsg-1) date 2026-01-23 08:01:42*
+G04 Created by KiCad (PCBNEW 9.0.2+dfsg-1) date 2026-01-23 08:14:38*
 %MOMM*%
 %LPD*%
 G01*

hardware/kicad/gerbers/SN-L00-F_Silkscreen.gto

@@ -1,12 +1,12 @@
 %TF.GenerationSoftware,KiCad,Pcbnew,9.0.2+dfsg-1*%
-%TF.CreationDate,2026-01-23T08:01:42+01:00*%
+%TF.CreationDate,2026-01-23T08:14:38+01:00*%
 %TF.ProjectId,SN-L00,534e2d4c-3030-42e6-9b69-6361645f7063,0.1*%
 %TF.SameCoordinates,Original*%
 %TF.FileFunction,Legend,Top*%
 %TF.FilePolarity,Positive*%
 %FSLAX46Y46*%
 G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
-G04 Created by KiCad (PCBNEW 9.0.2+dfsg-1) date 2026-01-23 08:01:42*
+G04 Created by KiCad (PCBNEW 9.0.2+dfsg-1) date 2026-01-23 08:14:38*
 %MOMM*%
 %LPD*%
 G01*

hardware/kicad/gerbers/SN-L00-drl_map.gbr

@@ -1,12 +1,12 @@
 %TF.GenerationSoftware,KiCad,Pcbnew,9.0.2+dfsg-1*%
-%TF.CreationDate,2026-01-23T08:01:45+01:00*%
+%TF.CreationDate,2026-01-23T08:14:39+01:00*%
 %TF.ProjectId,SN-L00,534e2d4c-3030-42e6-9b69-6361645f7063,0.1*%
 %TF.SameCoordinates,Original*%
 %TF.FileFunction,Drillmap*%
 %TF.FilePolarity,Positive*%
 %FSLAX45Y45*%
 G04 Gerber Fmt 4.5, Leading zero omitted, Abs format (unit mm)*
-G04 Created by KiCad (PCBNEW 9.0.2+dfsg-1) date 2026-01-23 08:01:45*
+G04 Created by KiCad (PCBNEW 9.0.2+dfsg-1) date 2026-01-23 08:14:39*
 %MOMM*%
 %LPD*%
 G01*
@@ -19,21 +19,61 @@ G04 APERTURE LIST*
 %ADD15C,0.143000*%
 G04 APERTURE END LIST*
 D10*
+X3660000Y-500000D02*
+G75*
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+G01*
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+G01*
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+G75*
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+G01*
 X0Y0D02*
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 X0Y-10000000D01*
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+X660000Y-500000D02*
+G75*
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+G01*
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+G01*
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@@ -42,34 +82,46 @@ X737580Y-9408170D02*
 X767580Y-9438170D01*
 X767580Y-9408170D02*
 X737580Y-9438170D01*
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 X2585000Y-9611240D01*
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@@ -984,16 +1036,12 @@ X3672325Y-10567555D02*
 X3653277Y-10586603D01*
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 X3634229Y-10596127D01*
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hardware/kicad/gerbers/SN-L00-job.gbrjob

@@ -5,7 +5,7 @@
       "Application": "Pcbnew",
       "Version": "9.0.2+dfsg-1"
     },
-    "CreationDate": "2026-01-23T08:01:42+01:00"
+    "CreationDate": "2026-01-23T08:14:38+01:00"
   },
   "GeneralSpecs": {
     "ProjectId": {

hardware/kicad/gerbers/SN-L00.drl

@@ -1,7 +1,7 @@
 M48
-; DRILL file {KiCad 9.0.2+dfsg-1} date 2026-01-23T08:01:45+0100
+; DRILL file {KiCad 9.0.2+dfsg-1} date 2026-01-23T08:14:39+0100
 ; FORMAT={-:-/ absolute / metric / decimal}
-; #@! TF.CreationDate,2026-01-23T08:01:45+01:00
+; #@! TF.CreationDate,2026-01-23T08:14:39+01:00
 ; #@! TF.GenerationSoftware,Kicad,Pcbnew,9.0.2+dfsg-1
 ; #@! TF.FileFunction,MixedPlating,1,2
 FMAT,2
@@ -21,16 +21,19 @@ G90
 G05
 T1
 X2.0Y-90.578
-X2.95Y-83.556
+X2.95Y-83.596
 X4.0Y-81.824
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-X10.657Y-92.358
+X10.0Y-90.54
-X24.0Y-83.998
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+X24.308Y-83.596
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-X29.051Y-89.092
+X28.776Y-89.367
+X32.083Y-84.742
+X33.628Y-98.16
 X35.15Y-90.436
-X38.055Y-89.679
 T2
 X12.38Y-51.84
 X12.38Y-54.38

hardware/kicad/scripts/autoroute.py

@@ -33,6 +33,15 @@ DRC_FILE = "DRC.rpt"
 FREEROUTING_JAR = "/tmp/freerouting.jar"
 FREEROUTING_URL = "https://github.com/freerouting/freerouting/releases/download/v2.0.1/freerouting-2.0.1.jar"
 
+# Mounting hole positions (M3, 3.2mm diameter)
+# Bottom holes moved up to avoid power section
+MOUNTING_HOLES = [
+    (5, 5),      # Top left
+    (35, 5),     # Top right
+    (5, 75),     # Bottom left (above power section)
+    (35, 75),    # Bottom right (above power section)
+]
+
 # Component positions for 8HP (40mm x 100mm) layout v2
 PLACEMENTS = {
     # Top - OLED display
@@ -124,6 +133,29 @@ def main():
             placed += 1
     print(f"  Placed {placed} components")
 
+    # Step 4b: Add mounting holes
+    print("\n[4b/9] Adding mounting holes...")
+    # Remove existing mounting holes first
+    for drawing in list(board.GetDrawings()):
+        if drawing.GetClass() == "PCB_SHAPE":
+            if drawing.GetShape() == pcbnew.SHAPE_T_CIRCLE:
+                # Check if it's a mounting hole (on Edge.Cuts, 3.2mm diameter)
+                if drawing.GetLayer() == pcbnew.Edge_Cuts:
+                    radius = pcbnew.ToMM(drawing.GetRadius())
+                    if 1.5 < radius < 1.7:  # ~3.2mm diameter
+                        board.Delete(drawing)
+
+    # Add new mounting holes
+    for x, y in MOUNTING_HOLES:
+        hole = pcbnew.PCB_SHAPE(board)
+        hole.SetShape(pcbnew.SHAPE_T_CIRCLE)
+        hole.SetCenter(place(x, y))
+        hole.SetEnd(place(x + 1.6, y))  # Radius = 1.6mm (3.2mm diameter)
+        hole.SetLayer(pcbnew.Edge_Cuts)
+        hole.SetWidth(mm(0.15))
+        board.Add(hole)
+    print(f"  Added {len(MOUNTING_HOLES)} mounting holes (M3, 3.2mm)")
+
     # Step 5: Export DSN
     print("\n[5/9] Exporting Specctra DSN...")
     board.Save(PCB_FILE)  # Save first

hardware/kicad/scripts/autoroute_cli.py

@@ -0,0 +1,116 @@
+#!/usr/bin/env python3
+"""
+SN-L00 Command-Line Autoroute Pipeline
+Run from terminal: python3 scripts/autoroute_cli.py
+
+Requires: kicad-cli or pcbnew Python module available
+"""
+
+import subprocess
+import os
+import sys
+
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+KICAD_DIR = os.path.dirname(SCRIPT_DIR)
+PCB_FILE = os.path.join(KICAD_DIR, "SN-L00.kicad_pcb")
+DSN_FILE = os.path.join(KICAD_DIR, "SN-L00.dsn")
+SES_FILE = os.path.join(KICAD_DIR, "SN-L00.ses")
+FREEROUTING_JAR = "/tmp/freerouting.jar"
+FREEROUTING_URL = "https://github.com/freerouting/freerouting/releases/download/v2.0.1/freerouting-2.0.1.jar"
+
+def run(cmd, desc, cwd=None):
+    """Run command with description"""
+    print(f"  {desc}...")
+    result = subprocess.run(cmd, capture_output=True, text=True, cwd=cwd)
+    if result.returncode != 0:
+        print(f"  ERROR: {result.stderr}")
+        return False
+    return True
+
+def main():
+    print("=" * 50)
+    print("SN-L00 Command-Line Autoroute Pipeline")
+    print("=" * 50)
+
+    # Check for kicad-cli
+    kicad_cli = None
+    for path in ["/usr/bin/kicad-cli", "/usr/local/bin/kicad-cli",
+                 "/Applications/KiCad/KiCad.app/Contents/MacOS/kicad-cli"]:
+        if os.path.exists(path):
+            kicad_cli = path
+            break
+
+    if not kicad_cli:
+        # Try to find in PATH
+        result = subprocess.run(["which", "kicad-cli"], capture_output=True, text=True)
+        if result.returncode == 0:
+            kicad_cli = result.stdout.strip()
+
+    if not kicad_cli:
+        print("ERROR: kicad-cli not found. Please run in KiCad scripting console instead:")
+        print("  exec(open('scripts/autoroute_full.py').read())")
+        sys.exit(1)
+
+    print(f"Using: {kicad_cli}")
+
+    # Step 1: Run placement script in KiCad
+    print("\n[1/4] Placing components...")
+    # kicad-cli pcb export dsn also runs any embedded scripts, but we need
+    # to place first. For now, assume placement was done or use Python API
+    print("  (Run place_8hp.py in KiCad first, or components should already be placed)")
+
+    # Step 2: Export DSN
+    print("\n[2/4] Exporting DSN...")
+    if not run([kicad_cli, "pcb", "export", "dsn", "-o", DSN_FILE, PCB_FILE],
+               "Exporting Specctra DSN"):
+        sys.exit(1)
+    print(f"  Created: {DSN_FILE}")
+
+    # Step 3: Download Freerouting if needed
+    print("\n[3/4] Running Freerouting...")
+    if not os.path.exists(FREEROUTING_JAR):
+        print("  Downloading Freerouting...")
+        if not run(["curl", "-L", "-o", FREEROUTING_JAR, FREEROUTING_URL],
+                   "Downloading"):
+            sys.exit(1)
+
+    # Run Freerouting
+    result = subprocess.run(
+        ["java", "-jar", FREEROUTING_JAR,
+         "-de", DSN_FILE,
+         "-do", SES_FILE,
+         "-mp", "200",
+         "-mt", "1",
+         "-oit"],
+        capture_output=True,
+        text=True,
+        cwd=KICAD_DIR
+    )
+
+    if result.returncode != 0:
+        print(f"  Freerouting error: {result.stderr}")
+        sys.exit(1)
+
+    # Parse output for timing
+    for line in result.stdout.split('\n') + result.stderr.split('\n'):
+        if 'completed' in line.lower():
+            print(f"  {line.split(']')[-1].strip()}")
+
+    print(f"  Created: {SES_FILE}")
+
+    # Step 4: Import SES
+    print("\n[4/4] Importing routed session...")
+    if not run([kicad_cli, "pcb", "import", "ses", "-i", SES_FILE, PCB_FILE],
+               "Importing Specctra session"):
+        # kicad-cli might not support import, manual step needed
+        print("  NOTE: Import via kicad-cli may not be supported.")
+        print("  In KiCad: File → Import → Specctra Session")
+    else:
+        print(f"  Imported routes into: {PCB_FILE}")
+
+    print("\n" + "=" * 50)
+    print("DONE! Open PCB in KiCad and run DRC to verify.")
+    print("=" * 50)
+
+if __name__ == "__main__":
+    main()

hardware/kicad/scripts/autoroute_headless.py

@@ -0,0 +1,293 @@
+#!/usr/bin/env python3
+"""
+SN-L00 Headless Autoroute Pipeline
+Fully automated: place → export DSN → freeroute → import SES → DRC
+
+Usage:
+  # Install dependencies first:
+  sudo apt install xvfb
+  pip install kigadgets
+
+  # Run:
+  python3 scripts/autoroute_headless.py
+
+Based on: https://github.com/atait/kicad-python
+"""
+
+import os
+import sys
+import subprocess
+import tempfile
+
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+KICAD_DIR = os.path.dirname(SCRIPT_DIR)
+PCB_FILE = os.path.join(KICAD_DIR, "SN-L00.kicad_pcb")
+DSN_FILE = os.path.join(KICAD_DIR, "SN-L00.dsn")
+SES_FILE = os.path.join(KICAD_DIR, "SN-L00.ses")
+DRC_FILE = os.path.join(KICAD_DIR, "DRC.rpt")
+FREEROUTING_JAR = "/tmp/freerouting.jar"
+
+# Component positions for 8HP (40mm x 100mm) layout v2
+PLACEMENTS = {
+    "MOD3": (20, 15, 90),
+    "J3": (10, 35, 0),
+    "J4": (30, 35, 0),
+    "SW1": (20, 48, 0),
+    "D5": (32, 48, 0),
+    "MOD2": (20, 62, 0),
+    "U2": (8, 78, 0),
+    "U4": (32, 78, 0),
+    "C4": (4, 78, 90),
+    "C5": (14, 78, 90),
+    "C6": (28, 82, 90),
+    "D3": (4, 82, 0),
+    "D4": (36, 78, 0),
+    "R2": (4, 86, 90),
+    "R3": (10, 86, 90),
+    "R4": (16, 86, 90),
+    "R5": (24, 86, 90),
+    "R6": (30, 86, 90),
+    "R7": (36, 86, 90),
+    "J2": (20, 88, 0),
+    "D2": (4, 92, 0),
+    "U3": (32, 94, 180),
+    "C2": (10, 94, 90),
+    "C3": (26, 94, 90),
+}
+
+
+def check_dependencies():
+    """Check if required tools are available."""
+    missing = []
+
+    # Check xvfb
+    if subprocess.run(["which", "xvfb-run"], capture_output=True).returncode != 0:
+        missing.append("xvfb (sudo apt install xvfb)")
+
+    # Check java
+    if subprocess.run(["which", "java"], capture_output=True).returncode != 0:
+        missing.append("java (sudo apt install default-jre)")
+
+    # Check kicad-cli
+    if subprocess.run(["which", "kicad-cli"], capture_output=True).returncode != 0:
+        missing.append("kicad-cli (install KiCad)")
+
+    if missing:
+        print("Missing dependencies:")
+        for dep in missing:
+            print(f"  - {dep}")
+        sys.exit(1)
+
+
+def download_freerouting():
+    """Download Freerouting if not present."""
+    if not os.path.exists(FREEROUTING_JAR):
+        print("Downloading Freerouting...")
+        url = "https://github.com/freerouting/freerouting/releases/download/v2.0.1/freerouting-2.0.1.jar"
+        subprocess.run(["curl", "-L", "-o", FREEROUTING_JAR, url], check=True)
+
+
+def run_pcbnew_script(script_content):
+    """Run a Python script inside pcbnew using xvfb."""
+    with tempfile.NamedTemporaryFile(mode='w', suffix='.py', delete=False) as f:
+        f.write(script_content)
+        script_path = f.name
+
+    try:
+        # Run pcbnew with xvfb, execute script, then exit
+        # This is a workaround since pcbnew doesn't have a direct script execution mode
+        result = subprocess.run(
+            ["xvfb-run", "-a", "python3", "-c", f"""
+import sys
+sys.path.insert(0, '/usr/lib/python3/dist-packages')
+try:
+    import pcbnew
+    exec(open('{script_path}').read())
+except Exception as e:
+    print(f"Error: {{e}}")
+    sys.exit(1)
+"""],
+            capture_output=True,
+            text=True,
+            timeout=120
+        )
+        print(result.stdout)
+        if result.stderr:
+            print(result.stderr)
+        return result.returncode == 0
+    finally:
+        os.unlink(script_path)
+
+
+def place_and_export():
+    """Place components and export DSN using pcbnew API."""
+    script = f'''
+import pcbnew
+
+board = pcbnew.LoadBoard("{PCB_FILE}")
+
+def mm(val):
+    return pcbnew.FromMM(val)
+
+def place(x, y):
+    return pcbnew.VECTOR2I(mm(x), mm(y))
+
+# Update board outline
+for drawing in board.GetDrawings():
+    if drawing.GetClass() == "PCB_SHAPE":
+        if drawing.GetShape() == pcbnew.SHAPE_T_RECT:
+            drawing.SetStart(pcbnew.VECTOR2I(mm(0), mm(0)))
+            drawing.SetEnd(pcbnew.VECTOR2I(mm(40), mm(100)))
+            print("Updated board outline")
+            break
+
+# Delete tracks
+tracks = list(board.GetTracks())
+for track in tracks:
+    board.Delete(track)
+print(f"Deleted {{len(tracks)}} tracks")
+
+# Place components
+placements = {repr(PLACEMENTS)}
+
+placed = 0
+for ref, (x, y, rot) in placements.items():
+    fp = board.FindFootprintByReference(ref)
+    if fp:
+        fp.SetPosition(place(x, y))
+        fp.SetOrientationDegrees(rot)
+        placed += 1
+
+print(f"Placed {{placed}} components")
+
+# Save board
+board.Save("{PCB_FILE}")
+print("Saved board")
+
+# Export DSN
+try:
+    result = pcbnew.ExportSpecctraDSN("{DSN_FILE}")
+    if result:
+        print("Exported DSN")
+    else:
+        print("DSN export returned False - trying alternate method")
+        # Try with board parameter
+        result = pcbnew.ExportSpecctraDSN(board, "{DSN_FILE}")
+        print(f"Alternate export result: {{result}}")
+except Exception as e:
+    print(f"DSN export error: {{e}}")
+'''
+    return run_pcbnew_script(script)
+
+
+def run_freerouting():
+    """Run Freerouting autorouter."""
+    print("Running Freerouting...")
+    result = subprocess.run(
+        ["java", "-jar", FREEROUTING_JAR,
+         "-de", DSN_FILE,
+         "-do", SES_FILE,
+         "-mp", "200",
+         "-mt", "1",
+         "-oit"],
+        capture_output=True,
+        text=True,
+        cwd=KICAD_DIR
+    )
+
+    for line in (result.stdout + result.stderr).split('\n'):
+        if 'completed' in line.lower() or 'error' in line.lower():
+            print(f"  {line.split(']')[-1].strip()}")
+
+    return os.path.exists(SES_FILE)
+
+
+def import_ses():
+    """Import SES file using pcbnew API."""
+    script = f'''
+import pcbnew
+
+board = pcbnew.LoadBoard("{PCB_FILE}")
+
+try:
+    result = pcbnew.ImportSpecctraSES("{SES_FILE}")
+    if result:
+        print("Imported SES")
+        board.Save("{PCB_FILE}")
+        print("Saved board")
+    else:
+        print("SES import returned False - trying alternate method")
+        result = pcbnew.ImportSpecctraSES(board, "{SES_FILE}")
+        if result:
+            board.Save("{PCB_FILE}")
+            print("Saved board")
+except Exception as e:
+    print(f"SES import error: {{e}}")
+'''
+    return run_pcbnew_script(script)
+
+
+def run_drc():
+    """Run DRC using kicad-cli."""
+    print("Running DRC...")
+    result = subprocess.run(
+        ["kicad-cli", "pcb", "drc",
+         "--severity-all",
+         "--units", "mm",
+         "-o", DRC_FILE,
+         PCB_FILE],
+        capture_output=True,
+        text=True
+    )
+    print(result.stdout)
+
+    # Count errors
+    if os.path.exists(DRC_FILE):
+        with open(DRC_FILE) as f:
+            content = f.read()
+        errors = content.count('; error')
+        warnings = content.count('; warning')
+        print(f"DRC: {errors} errors, {warnings} warnings")
+        return errors == 0
+    return False
+
+
+def main():
+    print("=" * 50)
+    print("SN-L00 Headless Autoroute Pipeline")
+    print("=" * 50)
+
+    check_dependencies()
+    download_freerouting()
+
+    print("\n[1/4] Placing components and exporting DSN...")
+    if not place_and_export():
+        print("Failed to place/export")
+        # Fall back to manual DSN check
+        if not os.path.exists(DSN_FILE):
+            print(f"ERROR: {DSN_FILE} not found")
+            print("Export manually: File → Export → Specctra DSN")
+            sys.exit(1)
+
+    print("\n[2/4] Running Freerouting...")
+    if not run_freerouting():
+        print("Freerouting failed")
+        sys.exit(1)
+
+    print("\n[3/4] Importing routed session...")
+    if not import_ses():
+        print("SES import failed - import manually in KiCad")
+
+    print("\n[4/4] Running DRC...")
+    success = run_drc()
+
+    print("\n" + "=" * 50)
+    if success:
+        print("SUCCESS! Board routed with no DRC errors.")
+    else:
+        print("Done. Check DRC.rpt for remaining issues.")
+    print("=" * 50)
+
+
+if __name__ == "__main__":
+    main()

hardware/kicad/scripts/place_6hp.py

@@ -0,0 +1,86 @@
+#!/usr/bin/env python3
+"""
+SN-L00 Component Placement Script for 6HP Eurorack
+Board at origin (0,0) to (28,100)
+Run in KiCad PCB Editor: Tools → Scripting Console
+Then: exec(open('scripts/place_6hp.py').read())
+"""
+
+import pcbnew
+
+board = pcbnew.GetBoard()
+
+def mm(val):
+    return pcbnew.FromMM(val)
+
+def place(x, y):
+    return pcbnew.VECTOR2I(mm(x), mm(y))
+
+# Component positions for 6HP (28mm x 100mm) layout
+# Board origin at (0,0), components placed relative to that
+placements = {
+    # Top - OLED display (rotated 90°, 13mm wide when rotated)
+    "MOD3": (14, 18, 90),
+
+    # Audio jacks
+    "J3": (7, 40, 0),       # RETURN_IN
+    "J4": (21, 40, 0),      # TRIG_OUT
+
+    # Button
+    "SW1": (14, 54, 0),
+
+    # RP2040-Zero module
+    "MOD2": (14, 70, 0),
+
+    # Signal conditioning ICs
+    "U2": (6, 85, 0),       # 74LVC1G17
+    "U4": (22, 85, 0),      # MCP6001
+
+    # Resistors
+    "R2": (3, 90, 0),
+    "R3": (7, 90, 0),
+    "R4": (11, 90, 0),
+    "R5": (15, 90, 0),
+    "R6": (19, 90, 0),
+    "R7": (23, 90, 0),
+
+    # Decoupling caps
+    "C4": (3, 85, 90),
+    "C5": (11, 85, 90),
+    "C6": (25, 85, 90),
+
+    # LED
+    "D5": (25, 90, 0),
+
+    # Protection diodes
+    "D3": (6, 94, 0),
+    "D4": (22, 94, 0),
+
+    # Power section
+    "J2": (14, 94, 0),      # Eurorack power header
+    "D2": (3, 94, 90),      # Protection diode
+    "U3": (25, 94, 180),    # LDO - moved right
+    "C2": (3, 90, 90),      # Input cap
+    "C3": (25, 90, 90),     # Output cap - moved right
+}
+
+print("Placing components for 6HP Eurorack layout...")
+placed = 0
+not_found = []
+
+for ref, (x, y, rot) in placements.items():
+    fp = board.FindFootprintByReference(ref)
+    if fp:
+        fp.SetPosition(place(x, y))
+        fp.SetOrientationDegrees(rot)
+        placed += 1
+        print(f"  {ref} -> ({x}, {y}) rot={rot}°")
+    else:
+        not_found.append(ref)
+
+print(f"\nPlaced {placed} components")
+if not_found:
+    print(f"Not found: {', '.join(not_found)}")
+
+pcbnew.Refresh()
+print("\nDone! Save (Ctrl+S), then export DSN for routing.")

hardware/panel/PANEL_SPEC.md

@@ -9,9 +9,7 @@
 | Thickness | 1.5-2.0mm | Aluminum or PCB |
 | Corner radius | 0mm | Square corners |
 
-## Mounting Holes
+## Mounting Holes (Eurorack Rails)
-
-Eurorack standard mounting rail positions:
 
 | Hole | X | Y | Diameter | Notes |
 |------|---|---|----------|-------|
@@ -22,51 +20,78 @@ Eurorack standard mounting rail positions:
 
 **Note**: Slots (elongated holes) of 3.2mm × 4mm allow for rail tolerance.
 
+## PCB Mounting
+
+The PCB (40×100mm) mounts horizontally behind the panel.
+
+| Parameter | Value | Notes |
+|-----------|-------|-------|
+| PCB offset from panel top | 10mm | PCB top edge at panel Y=10mm |
+| PCB offset from panel bottom | 18.5mm | Clearance for power header |
+| Standoff length | 10mm | M3 hex standoffs |
+| Standoff holes | 3.2mm | M3 clearance |
+
+### Standoff Mounting Holes
+
+| Hole | Panel X | Panel Y | PCB X | PCB Y |
+|------|---------|---------|-------|-------|
+| Top Left | 5mm | 15mm | 5mm | 5mm |
+| Top Right | 35mm | 15mm | 35mm | 5mm |
+| Bottom Left | 5mm | 85mm | 5mm | 75mm |
+| Bottom Right | 35mm | 85mm | 35mm | 75mm |
+
+Note: Bottom holes positioned above power section for routing clearance.
+
 ## Component Holes
 
-| Component | X | Y | Diameter | Notes |
+All positions aligned with PCB layout (PCB offset = 10mm).
-|-----------|---|---|----------|-------|
+
-| OLED cutout | 20.15mm | 25.0mm | 28×12mm rect | Rectangular window |
+| Component | Panel X | Panel Y | Diameter | Notes |
-| Button | 20.15mm | 50.0mm | 7.0mm | For 6mm tactile + cap |
+|-----------|---------|---------|----------|-------|
-| LED (status) | 32.0mm | 50.0mm | 3.0mm | For 3mm LED or light pipe |
+| OLED cutout | 20mm | 25mm | 28×12mm rect | Rectangular window |
-| Jack RETURN | 10.0mm | 95.0mm | 6.0mm | Thonkiconn PJ398SM |
+| Jack RETURN | 10mm | 45mm | 6.0mm | Thonkiconn PJ398SM |
-| Jack TRIG | 30.0mm | 95.0mm | 6.0mm | Thonkiconn PJ398SM |
+| Jack TRIG | 30mm | 45mm | 6.0mm | Thonkiconn PJ398SM |
+| Button | 20mm | 58mm | 7.0mm | For 6mm tactile + cap |
+| LED (status) | 32mm | 58mm | 3.0mm | For 3mm LED or light pipe |
 
 ## Panel Layout Drawing
 
 ```
       ←─────── 40.30mm ───────→
 
-      ┌───────────────────────────┐ ─┬─ 0.00mm
+      ┌───────────────────────────┐ ─┬─ 0mm
-      │   ○                 ○     │  │ 3.00mm (mounting holes)
+      │   ○                 ○     │  │ 3mm (rail mounting holes)
-      │                           │  │
-      │        SubModular         │  │ 12.00mm
       │                           │  │
+      │        SubModular         │  │ 12mm
+      │ ·                     ·   │  │ 15mm (standoff holes)
       │    ┌─────────────────┐    │  │
       │    │                 │    │  │
-      │    │      OLED       │    │  │ 19-31mm (display window)
+      │    │      OLED       │    │  │ 19-31mm (display window @ 25mm)
       │    │    DISPLAY      │    │  │
       │    │                 │    │  │
       │    └─────────────────┘    │  │
       │                           │  │
-      │         SN-L00            │  │ 42.00mm
-      │                           │  │
-      │           ◯         •     │  │ 50.00mm (button + LED)
-      │          BTN       PWR    │  │
-      │                           │  │
-      │                           │  │
-      │                           │  │
       │     ┌───┐       ┌───┐     │  │
       │     │   │       │   │     │  │
-      │     │ ○ │       │ ○ │     │  │ 95.00mm (jacks)
+      │     │ ○ │       │ ○ │     │  │ 45mm (jacks)
       │     │   │       │   │     │  │
       │     └───┘       └───┘     │  │
-      │    RETURN        TRIG     │  │ 105.00mm (labels)
+      │    RETURN        TRIG     │  │ 52mm (labels)
       │                           │  │
-      │      LATENCY TESTER       │  │ 115.00mm
+      │           ◯         •     │  │ 58mm (button + LED)
+      │          BTN       PWR    │  │
       │                           │  │
-      │   ○                 ○     │  │ 125.50mm (mounting holes)
+      │         SN-L00            │  │ 72mm
-      └───────────────────────────┘ ─┴─ 128.50mm
+      │                           │  │
+      │                           │  │
+      │                           │  │
+      │      LATENCY TESTER       │  │ 95mm
+      │                           │  │
+      │ ·                     ·   │  │ 85mm (standoff holes)
+      │                           │  │
+      │                           │  │
+      │   ○                 ○     │  │ 125.5mm (rail mounting holes)
+      └───────────────────────────┘ ─┴─ 128.5mm
 ```
 
 ## OLED Display Window
@@ -79,9 +104,7 @@ The 0.91" 128×32 OLED module dimensions:
 | Active area | ~22 × 6mm |
 | Mounting | Pin header on edge |
 
-**Panel cutout**: 28mm × 10mm rectangle, centered at (20.15, 25.0)
+**Panel cutout**: 28mm × 12mm rectangle, centered at (20mm, 25mm)
-
-Alternatively, a slightly larger window (30 × 12mm) gives tolerance for module alignment.
 
 ## Material Options
 
@@ -106,47 +129,20 @@ Alternatively, a slightly larger window (30 × 12mm) gives tolerance for module
 - Printing: Engraved or adhesive labels
 - Cost: ~€3-5/panel
 
-## PCB Panel Design
+## Hardware Required
 
-If using a PCB as the panel:
+| Item | Qty | Notes |
-
+|------|-----|-------|
-```
+| M3×10mm standoff | 4 | Hex, male-female |
-Front copper: None (for clean look) or decorative pattern
+| M3×6mm screw | 4 | Pan head, for PCB side |
-Back copper: Optional ground plane
+| M3 nut | 4 | Or use female-female standoffs |
-Silkscreen: All text and graphics
+| Thonkiconn nut | 2 | Included with jacks |
-Soldermask: Black (or custom color)
-```
-
-## Graphics & Text
-
-### Suggested Layout
-
-| Element | Position | Size | Font |
-|---------|----------|------|------|
-| "SubModular" | Top center, Y=12mm | 2.5mm | Bold sans-serif |
-| "SN-L00" | Above button, Y=42mm | 3.0mm | Bold |
-| "RETURN" | Below left jack, Y=105mm | 2.0mm | Regular |
-| "TRIG" | Below right jack, Y=105mm | 2.0mm | Regular |
-| "LATENCY TESTER" | Bottom, Y=115mm | 1.5mm | Light |
-
-## Hole Tolerances
-
-| Hole Type | Nominal | Tolerance |
-|-----------|---------|-----------|
-| Mounting | 3.2mm | +0.1/-0.0 |
-| Jack | 6.0mm | +0.1/-0.0 |
-| Button | 7.0mm | +0.2/-0.0 |
-| LED | 3.0mm | +0.1/-0.0 |
-
-## Files
-
-- **PANEL_SPEC.md** - This file
-- **SN-L00_panel.svg** - Vector graphic for manufacturing
-- **SN-L00_panel.kicad_pcb** - PCB panel (if using FR4)
 
 ## Assembly
 
-1. Mount OLED module with M2 standoffs or double-sided tape
+1. Insert standoffs through panel holes, secure with nuts on front
-2. Jacks mount through panel, secured with nut
+2. Mount jacks through panel, finger-tighten nuts
-3. Button may need extension shaft or cap
+3. Align PCB with standoffs and jack pins
-4. LED can use light pipe for front visibility
+4. Secure PCB to standoffs with M3 screws
+5. Fully tighten jack nuts
+6. Attach OLED module to PCB header

hardware/panel/SN-L00_panel.svg

@@ -4,13 +4,14 @@
      viewBox="0 0 40.30 128.5">
 
   <title>SN-L00 Eurorack Panel</title>
-  <desc>8HP Eurorack panel for SN-L00 Latency Tester</desc>
+  <desc>8HP Eurorack panel for SN-L00 Latency Tester - aligned with PCB</desc>
 
   <defs>
     <style>
       .panel { fill: #1a1a1a; }
       .hole { fill: none; stroke: #ff0000; stroke-width: 0.1; }
       .cutout { fill: none; stroke: #00ff00; stroke-width: 0.1; }
+      .standoff { fill: none; stroke: #0000ff; stroke-width: 0.1; }
       .text { fill: #ffffff; font-family: Arial, sans-serif; }
       .text-small { font-size: 2px; }
       .text-medium { font-size: 2.5px; }
@@ -22,51 +23,55 @@
   <!-- Panel background -->
   <rect class="panel" x="0" y="0" width="40.30" height="128.5"/>
 
-  <!-- Mounting holes (3.2mm) - RED for drill -->
+  <!-- Eurorack rail mounting holes (3.2mm) - RED -->
-  <!-- Top mounting holes -->
   <circle class="hole" cx="7.5" cy="3" r="1.6"/>
   <circle class="hole" cx="32.8" cy="3" r="1.6"/>
-  <!-- Bottom mounting holes -->
   <circle class="hole" cx="7.5" cy="125.5" r="1.6"/>
   <circle class="hole" cx="32.8" cy="125.5" r="1.6"/>
 
-  <!-- OLED display window (28x10mm rectangle) - GREEN for cutout -->
+  <!-- PCB standoff mounting holes (3.2mm) - BLUE -->
-  <rect class="cutout" x="6.15" y="20" width="28" height="10" rx="0.5"/>
+  <circle class="standoff" cx="5" cy="15" r="1.6"/>
+  <circle class="standoff" cx="35" cy="15" r="1.6"/>
+  <circle class="standoff" cx="5" cy="85" r="1.6"/>
+  <circle class="standoff" cx="35" cy="85" r="1.6"/>
 
-  <!-- Button hole (7mm) -->
+  <!-- OLED display window (28x12mm rectangle) - GREEN -->
-  <circle class="hole" cx="20.15" cy="50" r="3.5"/>
+  <rect class="cutout" x="6" y="19" width="28" height="12" rx="0.5"/>
 
-  <!-- LED hole (3mm) -->
+  <!-- Jack holes (6mm) - RED -->
-  <circle class="hole" cx="32" cy="50" r="1.5"/>
+  <circle class="hole" cx="10" cy="45" r="3"/>
+  <circle class="hole" cx="30" cy="45" r="3"/>
 
-  <!-- Jack holes (6mm) -->
+  <!-- Button hole (7mm) - RED -->
-  <circle class="hole" cx="10" cy="95" r="3"/>
+  <circle class="hole" cx="20" cy="58" r="3.5"/>
-  <circle class="hole" cx="30" cy="95" r="3"/>
+
+  <!-- LED hole (3mm) - RED -->
+  <circle class="hole" cx="32" cy="58" r="1.5"/>
 
   <!-- Text labels - WHITE silkscreen -->
   <text class="text text-medium" x="20.15" y="12" text-anchor="middle">SubModular</text>
 
-  <text class="text text-large" x="20.15" y="42" text-anchor="middle" font-weight="bold">SN-L00</text>
+  <text class="text text-small" x="10" y="52" text-anchor="middle">RETURN</text>
+  <text class="text text-small" x="30" y="52" text-anchor="middle">TRIG</text>
 
-  <text class="text text-small" x="20.15" y="57" text-anchor="middle">BTN</text>
+  <text class="text text-small" x="20" y="65" text-anchor="middle">BTN</text>
-  <text class="text text-small" x="32" y="57" text-anchor="middle">PWR</text>
+  <text class="text text-small" x="32" y="65" text-anchor="middle">PWR</text>
 
-  <text class="text text-small" x="10" y="105" text-anchor="middle">RETURN</text>
+  <text class="text text-large" x="20.15" y="75" text-anchor="middle" font-weight="bold">SN-L00</text>
-  <text class="text text-small" x="30" y="105" text-anchor="middle">TRIG</text>
 
-  <text class="text text-small" x="20.15" y="115" text-anchor="middle">LATENCY TESTER</text>
+  <text class="text text-small" x="20.15" y="98" text-anchor="middle">LATENCY TESTER</text>
 
   <!-- Decorative elements -->
-  <!-- Jack nut indicators (circles around jacks) -->
+  <!-- Jack nut indicators -->
-  <circle class="silkscreen" cx="10" cy="95" r="5"/>
+  <circle class="silkscreen" cx="10" cy="45" r="5"/>
-  <circle class="silkscreen" cx="30" cy="95" r="5"/>
+  <circle class="silkscreen" cx="30" cy="45" r="5"/>
 
   <!-- Display frame -->
-  <rect class="silkscreen" x="5.65" y="19.5" width="29" height="11" rx="0.5"/>
+  <rect class="silkscreen" x="5.5" y="18.5" width="29" height="13" rx="0.5"/>
 
-  <!-- Horizontal lines for visual separation -->
+  <!-- Horizontal separator lines -->
-  <line class="silkscreen" x1="4" y1="60" x2="36.30" y2="60"/>
+  <line class="silkscreen" x1="4" y1="38" x2="36" y2="38"/>
-  <line class="silkscreen" x1="4" y1="85" x2="36.30" y2="85"/>
+  <line class="silkscreen" x1="4" y1="68" x2="36" y2="68"/>
-  <line class="silkscreen" x1="4" y1="110" x2="36.30" y2="110"/>
+  <line class="silkscreen" x1="4" y1="102" x2="36" y2="102"/>
 
 </svg>