Fan, Display and Control
Copying functionality for Fan Shim by PIMORONI using a simple Adafruit fan, switch, fan control circuit and custom software. Raspberry Pi GPIO pin 19, header pin 35 (see PWM HAT pins), used to connect the control push-button and channel 0 from the 16-channel PWM HAT (address 0) to provide power and control the fan. See related: Design Considerations, and The Process, 9 - 15 Dec '19 , 16 - 22 Dec '19 , 17 - 23 Feb '20 and 24 Feb - 1 Mar '20).
- Push Button
- Manual/Auto Mode (Press & hold)
- Manual Mode On/Off (Push on/off)
- Monitor CPU Temperature
- Monitor CPU Frequency
- Control fan based on:
- Mode set by push-button
- CPU Temperature and parameters set
- CPU Frequency and parameter option
- Display Status on Unicorn
- Relative Temperature, 5-step ladder
- Fan on/off
- Manual/Auto mode
- Frequency normal/throttled