Fan Controller

Using RPi Pico to control three 4-pin PWM fans for inverter.

• Output 20kHz PWM to each fan independently

• Measure sync pulses from each fan to confirm rotation rate and detect failure

• Provide modbus slave control

References

• Source Code

• Sming (main)

• ArduinoJson Version 6

• IO Control

• LittleFS

SoC support

• rp2040