I’m designing a custom RP2040-based board and would love some feedback before I move to PCB layout.
System overview
- MCU: RP2040
- Power input: USB-C (5V) + external VIN with auto selection
- Protection: P-MOS reverse polarity + Schottky OR-ing
- Regulators: AP63205 buck (to 5V) → AP2112K LDO (3.3V)
- Motor driver: brushed DC motor stage (separate from logic rail)
- Sensing / IO: ADC + digital IO for external sensors
Design goals
- Simple and robust (no battery charging for now)
- Beginner-friendly but scalable
- Safe power path (no backfeed to USB)
- Suitable for motor + embedded control
Appreciate any feedback 🙏
u/Bhavithiran97 — 24 days ago