Electronics > Projects, Designs, and Technical Stuff
Wireless light bulb
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johnwa:

--- Quote from: Cyberdragon on April 03, 2019, 04:47:44 am ---You could also do it induction powered with a coil in the base. Tesla invented them as part of his whole wireless power scheme. In fact you can buy floating induction lamps as a novelty item.

--- End quote ---

Yeah, I had a bit of a play around with this a while ago when I was doing some induction heating experiments.


--- Quote from: Cyberdragon on April 03, 2019, 04:47:44 am ---Also, a battery and bulb (not sure if integrated) was probably used in the "cheese lamp" prank on the Carbanaro Effect.



You could do this with any normal lamp using those emergency backup bulbs as any conductive substance like fruit or something would trigger it.

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Haha, nice, yes, I think most of those lamps will work with even a quite high resistance across the terminals - I know my circuit will work with a couple of meg (with R5 removed).

I suppose, if you found a plug with two prongs of dissimilar metals, it would actually generate a bit of voltage if you plugged it into something acidic - perhaps enough to run an LED through a joule thief?
Cyberdragon:

--- Quote ---I suppose, if you found a plug with two prongs of dissimilar metals, it would actually generate a bit of voltage if you plugged it into something acidic - perhaps enough to run an LED through a joule thief?
--- End quote ---

That's not too uncommon here, all the ones at school are brass and something silver.
IDEngineer:
I meant to post a complete technical description of my brand new "Straight Wire with Gain" product, but Monday was hectic so it will have to wait another whole year.  >:D
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