This is a thin and lightweight heat sink, equipped with a 3510 ultra-quiet cooling fan, and the fan supports PWM speed regulation, which is perfectly compatible with Raspberry Pi OS. Other systems need to manually write python or C code to drive the fan speed through PWM.
|SUPPORTED PI||Raspberry Pi 4 Model B 1GB/2GB/4GB/8GB Version|
|POWER SUPPLY||DC 5V input (can be powered from Raspberry Pi)|
|INTERFACE||3-wire PWM speed-adjustable fan header|
|RATED POWER||0.3W (5V, 0.6±0.02A)|
1. Paste thermal pad to Raspberry Pi 4B as shown
2. Fix PI4-FAN-PWM with screws from the back of the Raspberry Pi
3. Connect the cables to GPIO. Red cable to 5V. Black to GND and Blue one to PWM pin(TXD/GPIO12/GPIO18 selectable)
4. When used with FAN Adapter, connect the cable as picture above, the default PWM pin is D12(GPIO12) ,You can switch to TXD or D18(GPIO18) by modifying the 0R resistor.