[sdiy] Proximity detector

[Fredrik Carlqvist]

Thanks for all the answers!

I think I will start with a theremin type of circuit. I need
it to generate MIDI control data from a dancer. I don't need
so much precision, but a longer range. So perhaps I will
have to use an IR detector eventually. But I have already
got the parts for the theremin circuits.

Fredrik C



-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of Tim
Escobedo
Sent: den 17 mars 2004 23:29
To: synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] Proximity detector


--- Fredrik Carlqvist <ifrc at iar.se> wrote:
> 
> Hi!
> 
> Does anybody know a circuit for detecting the presence of
a human 
> body? Kind of like the ones that open the doors at the
supermarket. 
> Preferrably, they would output a voltage proportional to
the distance 
> of the body.
> 
> 
> Fredrik Carlqvist

Someone recently posted some info about the QT301 chip. 

Also, there are a couple IR modules popular with robotics
folks that are configured as proximity detectors. 

Also try a search on the Theremin.

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