[sdiy] pseudo-random tone generator

[Tom Wiltshire]

On 14 Oct 2008, at 18:48, Dan Snazelle wrote:
>
>
> IMPORTANT...these buggers ONLY seem to work with +5 volts. i tried  
> it on + 12 and +15 and got nothing. ALSO when i tried interfacing  
> certain VCO's and other modular stuff to them that was being  
> powered by 12

I can't speak for the specific circuit in question, but I used to run  
a lot of 4000-series CMOS circuits and 555 timers off a 9V battery  
when I was a teenager. Seemed to work fine.
CMOS has pretty wide tolerances for supply voltage.

T.