- Joined Sep 10, 2017
N-channel mosfet (Q4) work fine for couple of time and suddenly turn on constantly.
I changed Q4 multiple of times and each time it work for couple of time and suddenly turn on constantly.
the output of mosfet is connected to a 2.5 amper 12 volt car windshield washer pump and the reason of C11 and R33 is because of water pump noise that cause microcontroller to dont work normal.
What could be the reason of this problem ?