where to start

**colin** · 06-08-2009, 01:40 PM

Nah dont worry, lots of chips have cracks in them!

Thats a joke :P Sounds like you blew a driver chip. That typically means one of your outputs is shorted.

**wilgartw** · 06-08-2009, 02:51 PM

i am not using any outputs

**greenman100** · 06-08-2009, 07:52 PM

or you hooked up your power supply backwards. either way, not good.

**wilgartw** · 06-09-2009, 03:28 AM

ok, quite certain i haven't unless the power supply in the house has a positive outer, i'll check this tonight.

i've ordered a new brain. it looks like the project is on hold again.

**wilgartw** · 06-17-2009, 03:16 PM

what a numpty,

i tested the power supply with a chepo battery tester, 12v +ve inner, great no probs.

when i tried it again (after blowing the brain, i thought i'd reverse the battery tester, still 12v ... hmmmm ... the power supply was 12v AC!!!!