So, you're saying that I don't really need a transformer to increase the voltage? Just a 30kv cap, then make it so that it charges up and then release the charge.

 

Ha, no.

He said a 30kV cap charger. If you thought that you could charge a 30kV cap to make it 30kV, try something easier. No really, you could easily hurt/kill yourself.

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No, You still need an Oscillator and transformer circuit to Get the 30 or 60KV. But instead of a Continuous Output you only want to "momentarly" charger the capacitor to give the shock.

But considering your understanding, I would recommend you don't attempt this.

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Yeah, I really don't want that much power. I suck at EC, but thought I could pull off at least this one.

Anyways, I still need to build it, so I'll go for a continuous output, but I still need to know what kind of change I need to make for the parts. I got a cellphone charger (Nokia) which has a input of 240v ac and output of 5v-11v. Can I use it?

or I need to pluck the transformer out and use that instead?

 

Yes timber must be dry though


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Could you please add another information about a stun gun and its purpose.

Cattle mover ,electric fence ,ATM Guard ,Policemans friend (other friend Mace)
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Does this device deliver an incapacitating amount of energy or is it one of those shitty camera flash circuits?

 

The schematic on the first page of this thread uses a little battery, little transformer, little transistor and no high voltage capacitor. Its shock will feel like a mosquito bite but the tingle will continue. A camera flash produces a powerful shock for a moment from its high voltage capacitor.

It might incapacitate (stun) a mosquito.

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hi... i build this circuit as part of my project now but i didn't put on the transformer.. and nothing happen when i touch the output... why? and what is the waveform at pin3? monostable or astable? can teach me? because my teacher doesn't teach us anything and ask us to do it... so i need your help...

 

Didn't you read the text of the project?
It says, "The transformer steps up the voltage to about 1800V".

Look at the datasheet for the LM555. It shows a square-wave output from the same astable oscillator circuit.

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Any idea how to measure the voltage and potential current?

I did measuring of the input voltage (14volts) and current (3 amps) and measured the primary vs secondary windings, used that ratio to calculate voltage and current. Is that the only way? There would be losses associated with the coil dropping the output?

 

Due to the flyback effect, the output voltage is likely to be over ten times the turns ratio of the coil.

You could stack a hell of a load of high voltage resistors on the output of your multimeter to form a divider but that isn't very accurate since the delivers the power in pulses. You really need to use a scope with a high voltage probe.

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I am looking to make a UV fly killer, anyone think this is the way to go? I hear alot say its not very powerful etc, but then Im just looking to zap flies

 

The Actual output Voltage depends on the length of your spark gap. The Spark gap acts like a Zener Diode.

The Pulsed Current on the output can be measured with a Small Dropping resistor and an Oscilloscope.

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pls post the PCB and where can be search the transformer, you post image of all circuit, front and rear, thanks!

 

Thanks for the info guys. All I know right now is that it makes a 5000v fence tester smoke, so there is plenty of voltage.

Google the internet. There are plans everywhere.