[sdiy] Theremin controller

[m.bareille at free.fr]

Hi,

> Yes, me too! Is it something similar to this circuit (at least the first
> section using the NOT gate)?
> http://www.physics.gla.ac.uk/~kskeldon/PubSci/exhibits/E9/cir2.gif
> I've breadboarded this and it doesn't seem to be working.

I work fine ! I have tested it many years ago... I have even routed a complete
pcb for it...

Compared to 'true' Theremins designs ( who do not need a vco chip to produce a
sound) the drawback  is that the  antenna range is limited to 10/15cm max...Else
it is stable and reliable :) Well i bet that for a similar effect there
areprobably much simpler schems , but this one is a good base to work on...

 Does anyone
> know how the 4098 should be wired? The schematic doesn't show which pin
> is connected to the 15k resistor, and it's unclear whether pins 3 and 4
> are supposed to be connected to ground or not.. I guess all other
> unlabelled pins are left open..?

Check the 4098 datasheet may be ? You will learn things ;)


Cheers,

Marc B.








te:
> > On 3/10/07, Grant Richter <grichter at asapnet.net> wrote:
> >> I have made a fairly useful proximity controller for the Synthi A.
> > ...
> >
> >> If people are interested I could write up the project for
> >> musicsynthesizer.com
> >
> > I would be interested in looking at a schematic.
> >
> > Thanks.
> >
> > (* jcl *)
> >
> >
>
>