On 29/07/12 12:27, kjelle.vergauwe wrote:
> Ok I retried measuring C3 and C4. For some reason I was probably doing something wrong.
> C3 & C4 measure around 580 and I get a 'beep' now.
No, don't measure the resistance, measure the voltage across them. You
reckon you saw 0V, so the circuit around Q1 isn't working.
This is most likely because shorting the supply killed Q1 - if you
notice, it's between the negative terminal of the power lead and ground.
If you shorted the positive terminal of the PSU to ground, you'd dump
all the current the PSU can provide into Q1 backwards, and it wouldn't
enjoy that...
You'll probably find it'll work just fine on batteries.
--
Gordonjcp MM0YEQ