@Arkadiusz said in Non PWM Led:
@dc42 Never connect the input of a DC-DC converter to a heater or fan output. - I did exactly that, what might be consequences?
I will follow your advice, thanks for letting me know.
It's likely to blow the mosfet that controls the heater or fan output, because of the surge current to charge the input capacitor of the buck regulator every time it turns on. A heater output might last a while, but a fan output is likely to fail quite quickly.