[sdiy] Cheap ccts....

[Scott Gravenhorst]

I can personally vouch for minimum 9 octaves of 
linear operation on this little gem.

=?iso-8859-1?Q?Ren=E9?= Schmitz <uzs159 at uni-bonn.de> wrote:
>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
>
> 
>

=========================================================  
- What good are laws that only lawyers understand?
- Government: The other religion.
- The media's credibility should always be questioned.
- Lambs who lie down with lions are lunch.

-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
-- Linux Rex         | RedWebMail by RedStarWare
-- FatMan: home1.GTE.NET/res0658s/FatMan/
-- NonFatMan: home1.GTE.NET/res0658s/electronics/