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switch behind plastic or plexiglass?

E

e_lectro

Limp Gawd
Joined
Oct 26, 2000
Messages
248
I remember seeing a while back on how to make a proximity or touch switch behind plexiglass. With it done this way, they switch can be hidden, and then you just touch an area on the plexiglas, plastic, or whatever and the switch is activated.

Does anyone know where I can find more info on this, or at least have any clue what I am talking about?

Thanks, e_lectro
 
That works by you touching a metal contact, there are lots of circuits out there to do this.

I don't even want to see that much. For example, a piece of glass or plexi, painted black on the back so that it looks solid. You touch the glass near the corner where the switch is behind it, and it activates...
 
wow, that's exactly what I'm looking for as well for a mod for a friend of mine. I made a metal touch plate one for my first comp mod, but I'm not sure if the resistance will be low enough even with very thin plexi+paint :-/
 
It's a capacity meter attached to a electromagnet. If you add more capacity to it (your own, or a metal bar) the capacity meter will see that and make the magnet operate a switch.
 
You need a momentary switch, and what we germans call a "foil contact" this is basically the type of contact you find on these cheap $1 calculators. You touch it lightly, which presses two pieces of metal foil together. Just glue this in the center of the acrylic panel, and affi the panel to the case. Wire up the switch to whatever you want, but don't put more that .1 amps @ 12 volts thru it. they fry easily.
 
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