Reverse stepdown circut taser

i used a 1-tranisistor (MJE13007) flyback and a diode voltage multiplier to power a TEA laser. The flyback itself produces ac thereby multiplied by the diode-capacitor multiplier resulting in some tens of uA DC on its output. i touched the output by accident a couple of times, quite a shock indeed. but the bright and loud discharge of the capacitor plates of the tea laser /400-500pF/ complelled me to use a plastic rod to touch/adjust it and intuitively discharge the cap with a screwdriver multiple times even when it was off. the discharge current is said to be hundreds of amps.

Flybacks output is straight DC for the modern ones. The modern ones look like a big black block with a big wire coming out the top. The older ones are AC output, and they are just a peice of metal with a big round thing (the coil) on it.

well, mine is a miniature xformer that came from a portable russian tv. indeed, it is composed of a coil on a ferrite yoke. the multiplier is also russian, it is basically a fairly large plastic thing containing diodes+caps, filled with epoxy rosin with the said HV wire coming out the opposite end plus an aux output for focus adjust voltage. i can vary its output from about 3-4kV to the 25-30kV the multiplier is rated for. much higher than that will result in either cap/insulation or diode breakdown

I have pushed my flyback to about 60kv, and around 80kv with the internal cap hooked up. It died a short while after though.... It sucks to have the power bug sometimes...

i get High voltage, i just said it would be very, very dangerous.......and it can kill you sometimes....u cant always know if its only gonna draw 1ma..

It doesnt Draw 1ma, it only outputs 1-2ma. The only way you will get a lethal current out of a flyback is if you use something like the "zvs flyback driver" and pump it with 500W. Just a circuit using a transistor to drive it will not allow any more than 1-2ma, and the windings in the flyback arent designed for high currents. If the arc is small, purple, cant be stretched long and is a squeeky noise, then its not a very high current, and is not lethal. If it is a fat, orange hot arc that can be stretched considerably, THEN you stay clear of it. Flybacks are quite predictable in their output, since they arent designed to operate at over 3ma output, they will get hot, or die uickly if they are overpowered, somewhat like laser diodes.

And yes High voltage will kill you, very easily under the wrong conditions.A flyback, usually anywhere from 5-60kv, at around 1-3ma will not cause your death, although it will result in a painful RF burn (burns the tissue under your skin). A car ignition coil is even safer than a flyback, with anywhere from 6-40kv output, but at less than 1ma. This is prolly the safest for of high voltage. a oil burner ignition transformer (OBIT for short) usually have 5-20ma, and is enough to kill you if you get it to travel across your heart. Neon sign transformers (NST for short) are higher voltage than a OBIT, somewhere from 2-15kv, and anywhere from 20-120ma. NST's are self current limiting, so if it says 30ma, it wont be over say 35ma ever. NST's will kill you even easier. Now if you are truly into high voltage, a pole transformer (you know those big ones that hang on the powerlines? Yep, people use those for HV experiments!) can be rated anywhere from 7500-9000V output. It may not seem like much, BUT its the current that counts here, a pole transformer has the capabilities to output OVER 2A into a dead short. Touch one of these anywhere, and your dead, no doubt! Theres only 1 case i have heard of someone surviving a shock from one of these, and even in that case he was thrown across the room, and had been passed out for over 5 hours. Luckily he had a friend that turned of the transformer before it fried his friend. The guy went to hospital and had 3rd degree burns, and a fractured bone somewhere. One statement i hear around is that its not the high voltage that kills you, its when it throws you across the room, that you land on something else that kills you, which is most often the case with electricians. Microwave oven transformers are only rated for 2000-4000V output, but can also have more than 2A output. Just me comparing the outputs of the transformers, and the ones you dont want to touch ;D ;D

(sorry i meant output, DK why i wrote draw)

hey thanks for the explanation, always good to know something more

i thought that from 3mA and on you could get injured.....at 3mA u feel some awful tickles (that is with voltage over 34v.)

Guysguysguys.....
A italian dude gave me a schematic that makes a flyback pulse at a lowish frequency, definitely enough to hurt (Personal experience).
Will post schematic on request.

one thing, its the current that kills, but the voltage is what allows the current to do the damage.

my 2 cents

Yep, i agree with that above statement. back on topic, a mobile phone will have a inverter, but you wont recevie much more than 300V out of it.

Things said:

Yep, i agree with that above statement. back on topic, a mobile phone will have a inverter, but you wont recevie much more than 300V out of it.

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Which makes a great camera taser, as it charges a cap.

happytomato said:

[quote author=Things link=1203988116/15#26 date=1207210140]Yep, i agree with that above statement. back on topic, a mobile phone will have a inverter, but you wont recevie much more than 300V out of it.

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Which makes a great camera taser, as it charges a cap.[/quote]
agreed, and camera tasers hurt like hell.... well not hurt but make your hand numb

toked323 said:

[quote author=happytomato link=1203988116/15#27 date=1207508330][quote author=Things link=1203988116/15#26 date=1207210140]Yep, i agree with that above statement. back on topic, a mobile phone will have a inverter, but you wont recevie much more than 300V out of it.

Click to expand...

Which makes a great camera taser, as it charges a cap.[/quote]
agreed, and camera tasers hurt like hell.... well not hurt but make your hand numb[/quote]
I learned that the hard way. I was turning my friends digital camera into an infrared camera and I forgot to short out the cap, my hand was numb for a long time after that.

Kinda OT ,but a nasty prank is to charge a camera capacitor, yell at your victim "catch" and toss them the cap. Or you charge a cap and roll it on the ground and wait until somebody picks it up.

I <3 Capacitors!!!1!!1!1!1111!