# Paul's LED Nameplate

## Overview
A USB-C powered desk nameplate PCB that spells "PAUL" in 0402 white LEDs.
Designed as a gift -- plug in an iPhone charger and the name lights up.

## Design decisions

- **Font:** 3x5 pixel dot-matrix, 3 mm pitch between LED centers, 4 mm gap between letters
- **LEDs:** 36 white 0402 LEDs (P=8, A=10, U=11, L=7)
- **Current limiting:** 36 individual 220 ohm 0402 resistors (one per LED, ~14 mA each at 5V)
- **Power:** USB-C receptacle (TYPE-C-31-M-12 / JLCPCB C165948) on the east edge
- **CC pulldowns:** 2x 5.1k ohm resistors on CC1/CC2 so any USB-C host supplies 5V default power
- **Bypass:** 100 nF 0402 cap on VBUS rail
- **Board:** 64x24 mm, 2-layer, rounded edges
- **Machine contacts:** 4 corner contacts for Adom workcell compatibility

## Power budget
- 36 LEDs x ~14 mA = ~504 mA total (well within USB-C 5V/900 mA default)
- All LEDs wired in parallel: VBUS -> resistor -> LED anode, cathode -> GND

## Silkscreen
- Top: "PAUL" label + "NAME IN LIGHTS" subtitle
- Bottom: "PAUL'S NAMEPLATE", "USB-C powered, 36 white LEDs", "v1.0, 2026"