I have a 4-pin 12V computer fan that I want to use to cool my Raspberry Pi 4 B.
My goal is to adjust the fan speed according to the Raspberry Pi’s temperature.
Can I use Kyle’s OSH Park speed boards for a 12V computer fan?
Can I safely use a 12 kΩ resistor in place of the 10 kΩ resistor on the OSH board?
You may have already figured this out, but I played around with this a couple of years ago and found just using a common level shifter to work fine. This is the diagram I used.
If you want the RPM signal, add a 1.5k resistor between the gpio pin you choose and 3.3v
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Thanks. I will try this as a solution.
