This #Badgelife PCB was created to test some circuits for future art PCBs.
It also served as a small project to bring to local hardware meetups. Partial assembly was done at JLCPCB.
- Powered by 2× AA Batteries
- Highly compatible with JLCPCB's basic SMT parts
- Raspberry Pi RP2040 microcontroller with dual-core ARM Cortex-M0+
- OLED Screen, RGB LEDs, Buttons
- SAO Connector
I rushed this project a lot. The schematic was done in a few nights, layout and routing in a few hours with no review. This PCB has a few mistakes. Not planning another spin, but leaving this list here:
Click to expand v1 Issues
- I saw someone else's design online using an RGB LED running at 3.3V (below spec). I tried to replicate it, and the LEDs were very flaky and worked intermittently. Experiment failed 😢.
- AA boost converter not yet tested; currently using USB power only.
Click to expand v2 Todo
- User LED + Power LED
- ON/OFF silk on switch
- Buzzer would be fun
- 5.1k USB CC1/CC2
- Planes on battery terminals to prevent lifting
- Use RPi boost for AA supply instead of boost converter
- It’s nice to have 5V for LEDs
- SAO connector is too big for this little PCB
- GND probe clip stuffing option
- Level shifter for RGB LEDs
Missing front buttons on this test PCB