BreadboardPSU
BreadboardPSU is a solderless breadboard compatible programmable power supply based on the USB PD PPS protocol.
Features
- 5 Selectable voltage outputs: 3.3V, 5V, 9V, 12V, 16V
- Single button UI (no jumpers)
- USB-C input
- RGB LED feedback
- Reverse current protection
- Fully customizable Voltage table and debug via SWIO & UART headers
Hardware
Microcontroller: CH32V006F8P6
- 32-bit RISC-V core
- 24MHz internal RC oscillator
- 8kB SRAM
- 62kB PROGMEM
- 8 channel 12-bit ADC
- 14 I/O port
- I2C, SPI, UART
- Debug: 1-wire SWIO
- Package: TSSOP-20
USB PD Sink Controller: CH224Q
- USB PD 3.0/3.2, EPR, PPS, SPR
- 100W(PD 3.0), 140W(PD 3.2)
- Config:
- 400kHz I2C
- Single resistor on CFG1 pin
- CFG1/2/3 logic-level selection
- Over-voltage protection
Dual PMV20XNER NMOS for reverse current protection & Vout EN
DCP3601NMR Buck converter for MCU power/logic rail
CLMUD-FKC RGB LED
2x 2x05 2.54 pitch header for breadboard connection
Schematics
Keybinds
- Select
LMB - Zoom In/Out
Scroll - Pan
RMB Drag - Reset View
R
PCB
Keybinds
- Select
LMB - Zoom In/Out
Scroll - Pan
RMB Drag - Rotate in 3D
LMB Drag - Reset View
R - Switch to 2D
2 - Switch to 3D
3 - Next / Previous Layer
+/- - Fold / Unfold in 3D (rigid-flex)
5 - Flip Board Top / Bottom
F
Quick start
❗Disclaimer: Breadboards have limited current capacity. Keep continuous current conservative (e.g., ≤ 1 A per rail unless you know your setup) 1. Plug a USB-C PPS capable charger/power bank into the board 2. Short-press the button to enable/disable the output 3. Long-press the button to cycle outputs: 3.3V → 5V → 9V → 12V → 16V 4. RGB LED indicates state/voltage (see table below):
| Voltage | LED color |
|---|---|
| 3.3 V | RED |
| 5 V | GREEN |
| 9 V | BLUE |
| 12 V | CYAN |
| 16 V | PINK |
Safety
- Max theoretical output current: 3A(limited by TjFET )
- Bench-test with current-limited supply first
- Breadboard contacts can overheat; watch temperature at > 1 A
- Device defaults to 3.3V upon loss of power/restart
🔜Code
Still waiting for board, stay tuned