[sdiy] RE: [AH] A question about voltage controlled oscillators.

[Alex Dickey]

> Is it possible to build very simple (one or two opamps, a few 
> resistors,
> a few capacitors, diode, transistor...) VCOs that will output up to
> audible frequency, or... not?

check this datasheet out:
http://www.fairchildsemi.com/ds/RC/RC4558.pdf
(oscillator's on page 8)

but i'm having problems getting this to work.  i think part of it is that
i'm probably mixing up my Vs' and Vc's.  can anybody shed some light here?
i was powering this using a 9v on a clip, and i had + from the battery going
to both pin 8 and pin 5, - from the battery going to pin 4, and then Vc and
the outputs going to jacks, with the jack grounds tied together.

can anyone see where i went wrong?

thanks,
alex