JZ
good tip indeed no 3.3 volt! all 2(3) 0 Volt means, all the pins of the 78m33 are 0 Volt
103 Ans Q105 12.6 and 12.2 on pin 1?means Q103 en Q105 pin 1 and 3 I measure 12 volt
on the switch I measure 12 volt on 1 side an 0 on the otherside of the switch
If I press the switch both pins become 0 volt and i see a small cuurent is drown form the PSU
but no voltage on the 78m33 stil all pins stay 0
where does the supply voltage? come from to feed the 78m33 ? and how much should this be ?
I can understand I it needs 3.3V to run
73 Frans
