# SN-L00 Project Status

**Last Updated**: 2026-01-23

## Current State: Ready for Prototype Order

### Completed

- [x] Schematic design (KiCad 9)
- [x] PCB layout 8HP (40×100mm)
- [x] Automated routing pipeline (`python3 scripts/autoroute.py`)
- [x] Panel design aligned with PCB
- [x] M3 standoff mounting system
- [x] Gerber files generated
- [x] Firmware source code

### Manufacturing Files

| File | Description |
|------|-------------|
| `hardware/kicad/SN-L00-gerbers.zip` | Upload to PCB fab (JLCPCB/PCBWay) |
| `hardware/kicad/gerbers/SN-L00-pos.csv` | Pick and place file |
| `hardware/panel/SN-L00_panel.svg` | Panel for laser cutting |
| `hardware/BOM.md` | Bill of materials with LCSC parts |

### DRC Status

- **0 unconnected pads** ✓
- 6 courtyard overlaps (cosmetic - acceptable)
- 1 edge clearance warning (manufacturable)

### Next Steps

1. **Order PCBs**
   - Upload `SN-L00-gerbers.zip` to JLCPCB or PCBWay
   - Specs: 2-layer, 40×100mm, 1.6mm, HASL, green/black solder mask
   - Qty: 5-10 for prototyping

2. **Order Panel**
   - Option A: PCB panel (order as PCB, black soldermask)
   - Option B: Laser cut aluminum (use SVG)
   - Option C: Laser cut acrylic

3. **Order Components**
   - See `hardware/BOM.md` for LCSC part numbers
   - Hand-solder: RP2040-Zero module, OLED module

4. **Build Firmware**
   ```bash
   cd firmware
   mkdir build && cd build
   cmake .. && make
   ```
   Flash `sn_l00.uf2` via USB bootloader

5. **Assembly**
   - SMD assembly (or hand solder SMD parts)
   - Solder through-hole: jacks, button, headers
   - Mount PCB to panel with M3×10mm standoffs
   - Connect OLED module

6. **Testing**
   - Power on test (check 3.3V rail)
   - OLED display test
   - Latency measurement validation

### Hardware Required for Assembly

| Item | Qty | Notes |
|------|-----|-------|
| M3×10mm standoff | 4 | Hex, male-female |
| M3×6mm screw | 4 | Pan head |
| M3 nut | 4 | For panel side |
| RP2040-Zero | 1 | Waveshare module |
| OLED 128×32 | 1 | 0.91" I2C module |

### Repository

- **Git**: https://git.sub-net.at/submodular/SN-L00
- **Org**: https://git.sub-net.at/submodular

### Quick Commands

```bash
# Regenerate PCB routing
cd hardware/kicad
python3 scripts/autoroute.py

# Regenerate Gerbers
./scripts/export_gerbers.sh

# Build firmware
cd firmware && mkdir -p build && cd build && cmake .. && make
```