[sdiy] switching and sensing

[Wood]

Sharp makes a pretty cool distance sensor that works through glass. It will increase/decrease voltage depending upon the distance of an object from it. Allied carries them, I don't know the model number but it is pretty easy to find anyway. And it's pretty cheap.
  ----- Original Message ----- 
  From: Rafael Cohen 
  To: synth-diy at dropmix.xs4all.nl 
  Sent: Tuesday, November 08, 2005 9:55 PM
  Subject: [sdiy] switching and sensing


  Hey all,

  I am interested in building something for an automatic-performance in an art gallery (in the window of an art gallery to be specific) where the audience on the outside will have some way to interact with the action on the other side of the glass.  I thought of two things I would like to pursue. 

  1)  Photocells
  2)  Touch point circuit completion a la Crackle-Box (I imagine that conductive mylar could be good for this).

  I would love any information about how to build a circuit that could switch things on and off with interaction in this way.  I have some experience with photocells, but not as switches.  Some sort of comparator maybe?  Relays?  I have no experience with relays. 

  Any help greatly appreciated.

  Best,
  Rafael


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