Hi All,
I have being playing around with a cabinet temperature controller on a Raspi 4 with NR which in theory should do the following:
- Monitor temperatures for lower and upper shelves
- If temperature rises in either the fans (2 (Arctic F12 PWM) increase or decrease in speed.
There are two RGB LED's which change colour according to the temperature's set and also this corresponds with the gauge in the dashboard. So far this is working fine.
I used the same principle for the PWM control but it does not seem to be working with the fans running at 100% from startup.
Any help would be gratefully appreciated.
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. Schoolboy error, I forgot to ground the fan to the raspi as well 
