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Topic: Controlling a stand alone LED remotely (Read 970 times) previous topic - next topic

Erika86

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

fungus


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...

No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

dhenry

Quote
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.

fungus


Quote
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.
No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

fungus

Another way would be to use something similar to Juan Mayoral's "Meteors" trick, as seen here:

http://www.youtube.com/watch?v=85H0-k77bS0

No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

mrboni


fungus


What's the tech in that trick?


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

No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

Erni

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

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