[sdiy] Cheap ccts....

[René Schmitz]

Hi Alan et al,

I think one of the cheapest VCOs might be the VCO4069 from my website. (See sig.)
The points raised by Jim are largely eliminated by using cheap NTC resistors 
(thermistors) instead of expensive platinum "tempco" resistors. And the simple 
expo convertor doesn't need a dual transistor. 
The only thing this circuit needs is a buffer/amplifier to bring the sawtooth 
signal to the same amplitude as the square wave, but a single transistor can do 
that.

Cheers,
 René


At 01:01 25.07.02 -0700, Alan Podjursky wrote:
>What are the cheapest synth circuits (in terms of construction costs) that
>I could build, yet still get a halfway-decent sound from? (I have a local
>copy of TomG's Cookbook, if that's any help.) Being a student with little
>money majorly blows.
>
-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159