How to wire up two (2) cable fan on AML-S905X-CC

Hardware
3

Glad you worked it out.

A couple notes, mostly for the sake of other searchers:

  1. There is no neutral. You have 5V or 3.3V DC and Ground. For a 5V fan, if you want it to run slower, use 3.3V, otherwise use 5V. Red to positive power, black to ground. Obviously check the docs for your device, and see what it’s rated for.
  2. The official pinout is here: GPIO Pin Header Maps and Wiring Tool for Libre Computer Boards
  3. If you’re not using the SPDIF header (9j1) for audio, that’s a convenient 5V power source that leaves your main 40 pin header (7j1) for other cool stuff.
  4. I’d review some DC electronics basics before messing around too much. If you’re used to AC wiring in houses, this is a different (and, thankfully, easier) beast altogether. If you shout the wrong pins you could damage things.
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