[sdiy] Add a theremin mod to an LFO....

[Harry Bissell Jr]

I would google for "cmos theremin" for an idea
of a circuit.  It would be crude but it will work
at near ranges.

PAiA has the Theremax theremin kit which would work
(maybe) better.

If you only need to sense a few inches of distance,
you
might try using a photonic approach like the Roland D
beam.  Marjan Urekar has the schematic on his site...
it is a lot simpler than a theremin

H^) harry


--- "mathieu.vallet" <mathieu.vallet1 at free.fr> wrote:

> HI, 
> 
>  
> 
> I built the Ray's Cool New LFO at
>
http://www.musicfromouterspace.com/analogsynth/coolnewlfo.html.
> 
> I'd like to add an antenna to control the LFO like a
> Theremin.
> 
>  
> 
> Is it possible?
> 
> Which circuit do I have to add??
> 
>  
> 
> I had added 2 copper plates to the LFO, one for
> GROUND and the other to
> control the LFO. IT work but I have to touch the
> copper plate for ground
> with a Hand and touch the other copper plate with
> the other hand. 
> 
>  
> 
> Is it possible to have more sensibility for the
> copper plate which controls
> LFO, so that I have not to oblige to touch the
> copper. 
> 
> Add a transistor??? A circuit??
> 
>  
> 
> Thanks if you help me
> 
> bye
> 
>