Dotcomformat

Hi David

Yes the CD4070 must have been damaged, when you reversed it you also had 
it reversed powered which is something CMOS ICs don't like at all ;-)

I suggest that you replace the CD4070.

Yves

Le 23/01/11 23:50, drryle a écrit :
> I am a rank beginner. I've built the Yves Usson YuSynth Random Gates
> module kit from Bridechamber and it has a bit of problems.
>
> http://yusynth.net/Modular/EN/RANDOMGATE/index.html
>
> The gate input indexes but it isn't random. I am getting a repeating
> pattern. The pattern changes after a long power down but it still repeats.
>
> Firstly, I'll admit the real problem is two-fold. My skills and the fact
> that (this is important) I actually had the XOR gates chip (CD4070) in
> backwards! Luckily I refuse to make anything now without good sockets so
> I simply reversed the chip and tried it again.
>
> Is the CD4070 zapped or is there something else to look for?
>
> -David
>
>
-- 
Yves Usson
http://yusynth.net