[sdiy] cheap twin oscillators?

[Ray Wilson]

Look here:

Simplest oscillator:
http://atlas.csd.net/~rjwsoft/NewAugustRampLFO.html

A bit more complex but cooler:
http://atlas.csd.net/~rjwsoft/NewAugustSIN_TRI_SQR_LFO.html

Temp compensated and good for a 1 volt/oct synth.
http://atlas.csd.net/~rjwsoft/August2003VCO.html

Ray


-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Lee Mulvogue
Sent: Thursday, September 11, 2003 7:05 AM
To: synth-diy at dropmix.xs4all.nl
Subject: [sdiy] cheap twin oscillators?


G'day

Just wondering if someone can point me in the right direction for schems to
a simple, cheap twin oscillator?
I want to make a circuit to give me a "power hum" sound (like a
high-voltage transformer), and I was thinking maybe twin oscillators
slightly out of phase?  Do you think square waves with a very crude
low-pass filter to round them off a bit would do the trick?
As I said, cheap and simple are the keys here, so I'm thinking maybe a dual
IC of some sort?  Any help would be greatly appreciated.

Thanks
Lee
lee at baudalign.com