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Hi,
I'm trying to making a small installation and I would need a LED inside a glass (without any wire) that turns on when I raise the glass.
Is there any way to control this kind of behaviour?
Thanks
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I'm trying to making a small installation and I would need a LED inside a glass (without any wire) that turns on when I raise the glass.
Is there any way to control this kind of behaviour?

Sure, all you need is a pressure switch on the bottom of the glass.

There's going to be a more electronics inside the glass than just an LED though. Batteries, wires, a transistor or two...

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Is there any way to control this kind of behaviour?

One way would be to use an inductor + the led's capacitance to form an l/c tank. If you energy the whole thing with the right frequency, the led will light up. The same principle behind those little led phone-is-ringing indicators.
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Is there any way to control this kind of behaviour?

One way would be to use an inductor + the led's capacitance to form an l/c tank. If you energy the whole thing with the right frequency, the led will light up. The same principle behind those little led phone-is-ringing indicators.


That's a good idea. That way you could have the most of the electronics out of sight up your sleeve.
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Valencia, Spain
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Another way would be to use something similar to Juan Mayoral's "Meteors" trick, as seen here:



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What's the tech in that trick?
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What's the tech in that trick?

I'm bound by the magician's code...

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A tilt switch + resistor+LED+coincell(s)
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