Homemade Stun Gun With Continuos Spark
It's easy to get a capable step up transformer, just buy a stun gun, or ignition coil. With the setup as shown though, it will only produce a spark when the switch is being turned off (turning it on stores energy in the transformer, turning it off releases the energy). What you need is a way to pulse this current rapidly, which a stun gun already does. If you want it to be even faster you need to build your own circuit, and then things get a bit complicated.
http://www.amazing1.com/shocking_electric_modules.htm than hit the free plans tab on the first item you can try to build it 
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Flying_Salt
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One, try not to bold it, very hard on the eyes. And two, try looking on Ebay.Terryg43 wrote:Just out of curiousity has anyone located a HTSUT (High Turns Step up Transformer) that Urban Ninja was going to use with his ignition system. I'm in the U.S. and haven't had much luck locating one. Radio Shack has been no help. Thanx.......
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you dont need high ampreage to arc electricity, that is the voltage, a stungun has high voltage and very low ampreage, if you want a continuous spark jsut buy a stungun, that will be less complicated high ampreage work that could get you killed while screwing with a flyback.
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A DC pulse into the kind of transformer proposed will produce a single spark output.
Hooking up DC to a transformer will not produce a constant output aside from heating the coil and draining the battery like mad.
If you want continuous DC pulses to get a continuous HV output through a suitable transformer you need either an electrical circuit or a mechanical system to provide the pulses.
I've not got the will to work out a circuit but a mechanical setup could be a ignition coil with at least one input contact attached to a small electric motor to cause an electrical pulse into the coil every time it came round to make the contact.
That would result in a HV output spark with each contact made and broken. It would spark as fast as the motor could turn.
Not as compact as a totally electrical arrangement but very simple and easy to understand.
Hooking up DC to a transformer will not produce a constant output aside from heating the coil and draining the battery like mad.
If you want continuous DC pulses to get a continuous HV output through a suitable transformer you need either an electrical circuit or a mechanical system to provide the pulses.
I've not got the will to work out a circuit but a mechanical setup could be a ignition coil with at least one input contact attached to a small electric motor to cause an electrical pulse into the coil every time it came round to make the contact.
That would result in a HV output spark with each contact made and broken. It would spark as fast as the motor could turn.
Not as compact as a totally electrical arrangement but very simple and easy to understand.
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Fnord
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Thinking back a ways, if I remember correctly tesla used motors to try to produce high freqency AC, but then discovered that discharging a leyden jar(sp?) through a transformer created high frequency alternating current, on the order of millions of hertz.
I dont know if this is correct(its been a while...), so if someone knows for certain please say so.
I dont know if this is correct(its been a while...), so if someone knows for certain please say so.
This discussion is going nowhere, but for the sake of science...
But what do Tesla coils have to do with the high inductance transformers that started this topic?
A leyden jar is a capacitor. Connect it to a transformer and power supply and you have the primary side of a Tesla coil. To make anything useful you need to tune the transformer's secondary and another cap (the torus) to the 1st LC circuit.
And you get pretty plasma, but you'd be MUCH better off just sticking to a battery, an inverter (oscillator, driver, what ever you want to call it. You only need 2 transistors) and a transformer. Just don't expect foot-long sparks from a 9V battery.
So 2MHz is 2 million Hz.Wikipedia wrote:the primary and secondary circuits were [...] tuned so that they resonated at the same (high) frequency (typically, but not always, between 25 kHz and 2 MHz)
But what do Tesla coils have to do with the high inductance transformers that started this topic?
A leyden jar is a capacitor. Connect it to a transformer and power supply and you have the primary side of a Tesla coil. To make anything useful you need to tune the transformer's secondary and another cap (the torus) to the 1st LC circuit.
And you get pretty plasma, but you'd be MUCH better off just sticking to a battery, an inverter (oscillator, driver, what ever you want to call it. You only need 2 transistors) and a transformer. Just don't expect foot-long sparks from a 9V battery.