4KV Taser! -Help Me Design!

I'm Alex and i like high voltage!

Now to the matter at hand...
You know those disposable camera circuits?
I noticed that they have 2 coils, one for charging the capacitor and one for triggering the flash.
i was wondering if someone could help me build/design a circuit that uses the trigger coil.
Electronic Goldmine has a Mini 4KV trigger coil that claims to be of high voltage.
Does anyone know how i can wire it to produce HV in pulses?


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tech-king9 years ago
a cmos 555 in ashtable can produce pretty fast pulses. attach it through a 2n3055 to power and the coil on the transistors emitter, and it could work.
Sandisk1duo (author)  tech-king9 years ago
Why the 2n3055? why not 2n3904? i was thinking maybe make a couple kits powered by 9v, sell them at school
a 2n3055 has a high amperage rating, which will help it handle the kickback from the coil.
Sandisk1duo (author)  tech-king9 years ago
I see, but will it work with a 2n3904?
nope. 200 ma is probably not enough for a high amperage return kickback spike. the 2n3055 has something like 15 ams rating, and should do better.
Sandisk1duo (author)  tech-king9 years ago
can you draw me a diagram? please?
not right now. i have exams this week. but its fairly simple; set up a 555 in astable with a high frequency oscillation (guy has an oscilloscope; he could check the hz on a disposable camera for you) output the power to the base of the 2n3055 and send the collector of that transistor to power, the emitter to the coil. any more questions? feel free to ask. or should i give my safety speech now?
Would it not be easyer to use a simple 555 astable and a audio matching transformer, followed by a simple multi stage diode / cap voltage doubler ?? And then you would not have to worry about huge kickback spikes...
Sandisk1duo (author)  Big Bwana9 years ago
555s can't drive gi-huge-ic transformers, but thats a good idea!
the transformer I was thinking about is those small audio input one's they are 75mW max, And yea I would probably have to use a 2n2222 as the driver ... And then feed the output from the transformer to a voltage multiplier, but I guess one could just feed the out from a camera strobe into a voltage multiplier ...
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