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florian.berthold d43c7976ad 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)

2026-01-23 08:15:25 +01:00

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SN-L00 Panel Specification

Eurorack 8HP Panel Dimensions

Parameter	Value	Notes
Width	40.30mm	8 × 5.08mm (8HP)
Height	128.50mm	3U standard
Thickness	1.5-2.0mm	Aluminum or PCB
Corner radius	0mm	Square corners

Mounting Holes (Eurorack Rails)

Hole	X	Y	Diameter	Notes
Top Left	7.5mm	3.0mm	3.2mm	Horizontal slot optional
Top Right	32.8mm	3.0mm	3.2mm	Horizontal slot optional
Bottom Left	7.5mm	125.5mm	3.2mm	Horizontal slot optional
Bottom Right	32.8mm	125.5mm	3.2mm	Horizontal slot optional

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

All positions aligned with PCB layout (PCB offset = 10mm).

Component	Panel X	Panel Y	Diameter	Notes
OLED cutout	20mm	25mm	28×12mm rect	Rectangular window
Jack RETURN	10mm	45mm	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 ───────→

      ┌───────────────────────────┐ ─┬─ 0mm
      │   ○                 ○     │  │ 3mm (rail mounting holes)
      │                           │  │
      │        SubModular         │  │ 12mm
      │ ·                     ·   │  │ 15mm (standoff holes)
      │    ┌─────────────────┐    │  │
      │    │                 │    │  │
      │    │      OLED       │    │  │ 19-31mm (display window @ 25mm)
      │    │    DISPLAY      │    │  │
      │    │                 │    │  │
      │    └─────────────────┘    │  │
      │                           │  │
      │     ┌───┐       ┌───┐     │  │
      │     │   │       │   │     │  │
      │     │ ○ │       │ ○ │     │  │ 45mm (jacks)
      │     │   │       │   │     │  │
      │     └───┘       └───┘     │  │
      │    RETURN        TRIG     │  │ 52mm (labels)
      │                           │  │
      │           ◯         •     │  │ 58mm (button + LED)
      │          BTN       PWR    │  │
      │                           │  │
      │         SN-L00            │  │ 72mm
      │                           │  │
      │                           │  │
      │                           │  │
      │      LATENCY TESTER       │  │ 95mm
      │                           │  │
      │ ·                     ·   │  │ 85mm (standoff holes)
      │                           │  │
      │                           │  │
      │   ○                 ○     │  │ 125.5mm (rail mounting holes)
      └───────────────────────────┘ ─┴─ 128.5mm

OLED Display Window

The 0.91" 128×32 OLED module dimensions:

Parameter	Value
Module size	~38 × 12mm
Active area	~22 × 6mm
Mounting	Pin header on edge

Panel cutout: 28mm × 12mm rectangle, centered at (20mm, 25mm)

Material Options

Option A: Aluminum (Professional)

Material: 1.5mm aluminum 5052-H32
Finish: Brushed, anodized black
Printing: Laser engraved or UV printed
Cost: ~€10-15/panel (qty 5)

Option B: PCB Panel (DIY-friendly)

Material: 1.6mm FR4
Finish: Black soldermask, ENIG
Printing: Silkscreen white
Cost: ~€2-5/panel (qty 5 from PCBWay)

Option C: Acrylic (Budget)

Material: 3mm black acrylic
Finish: Laser cut
Printing: Engraved or adhesive labels
Cost: ~€3-5/panel

Hardware Required

Item	Qty	Notes
M3×10mm standoff	4	Hex, male-female
M3×6mm screw	4	Pan head, for PCB side
M3 nut	4	Or use female-female standoffs
Thonkiconn nut	2	Included with jacks

Assembly

Insert standoffs through panel holes, secure with nuts on front
Mount jacks through panel, finger-tighten nuts
Align PCB with standoffs and jack pins
Secure PCB to standoffs with M3 screws
Fully tighten jack nuts
Attach OLED module to PCB header

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