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Since your last comment was flagged for moderation, which I can't do anything about, I am answering here:

Pin3 = EL -> which is On/Off
Pin2 = VR -> this ist the speed control

The firmware does:
digitalWrite(2,iRPM>0);
const int iMin=30;analogWrite(3,iMin + (long(iRPM)*(255-iMin)/1000));

So I clearly mixed up 2 and 3 in the schematic, I have changed it in the github,