RP2040-Zero Powered 12V Motor Controller

RP2040 microcontroller handles status LEDs, an H-Bridge driver, and a rotary encoder input. RP2040's PIO is used to read encoder signals as a state machine, completely restraining bouncing errors from the input lines. This allows to use cheap encoders and have an amazing precision.

---

---

PCB

• Designed in KiCad.
• Screw terminals 12V power input and motor output.
• Two versions include buck converter and linear regulator.

---

Software

1. Rotary Encoder:
   • PIO reads encoder signals and adjusts speed.
2. Rotary Encoder's Switch:
   • Changes motor direction via the H-Bridge.
3. PWM:
   • Controls motor speed by adjusting duty cycles.
4. Status LEDs:
   • Show real-time speed and direction updates.

---

Requirements

• Rust Toolchain: For building firmware.
• elf2uf2-rs: To flash the RP2040 (cargo run automatically searches for connected rp2040 and flashes thefirmware).
• KiCad: adjust PCB design.

---

Provides a reference for PIO-based rotary encoder handling in Rust.