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MAKE A HIGH VOLTAGE SUPPLY IN 5 MINUTES

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Step 5: Disclaimer

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The circuits in this Instructable use very high voltages and currents.

These currents and voltages are deadly! You can easily hurt yourself, as well. Build this circuit at your own risk.

This type of high frequency high voltage current is used in surgical cauterizers. So if you get shocked you will burn yourself and cut your flesh. There is also a considerable fire hazard from the circuit.

Use the Nikolai Tesla's safety techniques when working with high voltages:

1. Only use one hand (put your other hand on your lap or pocket)
2. Wear insulating shoes
3. Use a dead man stick or insulated pliers when touching or manipulating the circuit.
4. Use a power bar with a thermal fuse rather than sticking the circuit directly in the socket. This will limit the current that will go through your body.
5. When soldering, disconnect the circuit from the power outlet.

Generally, in electricity it is the the current that kills. if the currents are low there is little danger even if the voltages are very high (think of Tesla holding the his Tesla coil).

This circuit has high currents which makes it considerably dangerous.

a 65W CFL can deliver 65mA easily (65W/1000v).

And if you look at the picture below, at greater than 50mA the little guy is dead.
 
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maddog1013 years ago
Hey can somebody help me with how to get the flyback transformer off the circuit board of the CRTmonitor? i don't know if i should break the circuit board or what i should do. can somebody please help me!?
I USED A PROPANE BLOW TORCH IT EASIER LIKE THAT SINCE IT HEATS ALL THE PINS HEAT UP FAST, ITS IMPOSSIBLE TO DO IT WITH AN IRON CAUSE YOU'D HAVE TO GO OVER EACH PIN INDIVIDUALLY , I ALSO USE THE TORCH TO REMOVE MOST OTHER COMPONENTS EASILY, ALSO THE TORCH CAN BE SELF STANDING ON A TABLE WHILE YOU USE BOTH HANDS TO GUIDE THE CIRCUIT PINS ON THE FLAME WHILE PULLING THE TRANS WITH THE OTHER HAND.
OW! MY EARS HURT FROM ALL THE YELLING! Seriously, there's no real reason to capitalize an entire paragraph.
Biotele (author)  maddog1013 years ago
Break the board with a pair of pliers. Wear gloves and safety glasses.
i want to build cockroach electronic trap from 9v dc 200mA out put votage 4.5 kv where can i get circuit ? pl help ...
OVERLOADED2 years ago
ARE YOU SURE 50mA IS CORRECT? THIS IS .05A IS THIS ENOUGH TO KILL??? WHAT ABOUT ADAPTERS? THEY DELIEVER SAY 12V AT 500mA BUT I DONT THINK IF I TOUCH - AND + OF FEMALE FROM ADAPTER YOU WOULD DIE?
handyman293 years ago
Is it 50mA or 50MA, because I don't think 0.05A is enough to kill someone. I would think 5A is enough to cause damage. I've worked with wires connected to 500mA sources and I am still here.
Mansheep223 years ago
I've found that new CFL's are incorporating more advanced circuit-detecting abilities, and are harder to fool into thinking a bulb is attached. Also, I am unable to get nearly the same voltage other people are getting (probably just under 1,000v DC at 1.7mA), and am going to try to wire two or more flyback transformers in line, to keep amping up the voltage. Will I die in a fiery explosion if I attempt this? Thanks
Biotele (author)  Mansheep223 years ago
can you post a picture of the circuit?
comodore5 years ago
Hes not Nikolai Tesla, hes Nikola, NIKOLA, please correct that mistake! Thank you!
-max- comodore3 years ago
i think "Nikolai" and "Nikola" are spelled both ways...
comodore -max-3 years ago
nope, believe me....I am from Serbia so I know for sure !
brady9114 years ago
I finally got mine to work, BUT, it only produced about 5Kv. Anyone know what a source to the problem could be?
brady9114 years ago
I cant figure out the Pins on my Flyback. i did what the instructable said but it didn't work
Biotele (author)  brady9114 years ago
Take two heavily insulated wire with alligator clips at each end and try every combination of pins possible, one at a time. Turn off the circuit every time you change the alligator clips configuration (very important).

THANKS! but i think this one is shot. so im ordering a new one. I think it was a bad one anyways. the test with the Volt/Ohm meter didn't get a result. but if i cant find it that way ill try every possible combination

Got it to work! Awesome. I was starting to doubt my ability. But a larger CFL, some experimentation, and some time later.. And I got a cool purple arc between a pair of nails. Next, get a couple of rods and finish up the project with a Jacob's ladder. Thanks for the great instructable. And the advice.
Biotele (author)  Dirtie Hippie4 years ago
can you post a picture of you setup? that will be cool. Thanks.
firehand74 years ago
Neat idea! I have been designing industrial electronics for many! years. I cannot emphasize enough that ALL projects using AC mains (110v or 220v) should be isolated from the power line. Isolation transformers are inexpensive and can save your life. They eliminate the path to ground.
I LOVE THIS Instructable! I plan on using the power supply for making a Cold Plasma Device. I LOVE those things to. Once I finish building it, if it works, I might write an instructable about it. P.S. thanks for writing this, I needed a power sup. +30KV and I couldn't figure out how to do it myself. This stuff REALLY scares my parents. I'll have to build it outside(they don't understand that Cold Plasma is completely harmless).
Biotele (author)  ColdPlasmaDevice5 years ago
I made this instructable especially for people like you that need an easy to build HV supply. Enjoy and looking forward to your Instrutable.
joinaqd Biotele5 years ago
can you tell me how much current a photoflash capacitor has?i dont have a volt meter..
quite high. high enough to give me the expression of the little man no3 up there- about 10-15 mA. it won't kill, but you get a quite painful shock. it dosen't involve sparks, its just like a weird hot, burning sensation, but when i looked at my fingers they weren't burnt
If the capacitor is still on it, the current could be way higher. A capacitor stores electrons. So a small current can charge it slowly, and then it can all come out quickly, like when the flash goes off.
Please guys, study basic electronics before you get hurt. Ohm's law is simple, Algebra 1 level math. Voltage (Volts) is the push. Current (Amps) is the flow. Resistance (Ohms) is how hard it is for current to flow. So the flow is equal to the push divided by the resistance , like in everyday life.
V=AR, A=V/R, R=V/A
lol same here
joinaqd5 years ago
i want to get out a flyback transformer but im only 15 and my parents wont let me bring a TV home!!damn parents!!!
Kent joinaqd5 years ago
Find a place where people dump junk. Find an old TV. A transformer works only on changing voltages, and therefor current. When the current in the primary coil changes, the magnetic field changes, moving through the secondary coil, generating a voltage. Working with high voltage is dangerous, so you should study it before you do something dumb. Joyriding could get you hurt.
tesla coil5 years ago
I always heard just 10mA will kill you !?!?
only if its high enough voltage to jump across jour heart. for instance, one of my ac-dc adapters takes in 120 volts AC and puts out 12V DC at 500mA. its high current, but the voltage is to low to travel all the way though my body because of human's high resistance
Kent5 years ago
For safety, I suggest a GFI (Ground Fault Interrupter) as the source of power. These sense a flow of current to ground, rather than through the neutral wire. That means some current is going through the circuit and not coming back, most likely by taking a short cut through your body. They are made to react to a 5 MA leak within 25 milliseconds. It is still possible to be shocked if there is a capacitor in the circuit. I won't say how big the capacitor has to be to hurt because it depends on the voltage. Philgenius, 16 J across the heart is a good guess for a deadly shock, but I wouldn't take 15 J. Or 5. It is going to hurt. You just can't be too careful with high voltage. Be sure the power is off before touching the wires, and short the circuit while holding the insulated part of the tool. Don't let your fingers slip down to the metal. Work slowly, and think about what you are doing. Don't work on this late at night when you are tired, and work on it when someone is around to call 911 if you do something stupid. And don't tell your mother what you are doing.
lol good tips
Biotele (author)  Kent5 years ago
That will be the safest, but most people are not familiar with GFIs.
1oooop Biotele5 years ago
it's quite easy, I figured it out in about 30 seconds and stunned my parents
setinight5 years ago
I tried using the CFL circuit on a microwave transformer, but didn't get squat. Is there a way to use your circuit to make it work on a MOT? (By the way, I got it to work great on a TV flyback, but I'm still trying to find a way to get ac output. Taking out the diode is not going to work and hard to find old TV without it)
Biotele (author)  setinight5 years ago
the MOT has too much impedance it is designed to operate at 60HZ. My suggestion is to try to fry the built-in in diode in order that it conduct ac. I never tried it, but maybe someone has, so google it.
Thanks for your info. Actually, what I am trying to do, is build a poor-man's heat induction coil. I was trying to use your CFL circuit towards that end, but may be a dead end. Any ideas or suggestions along that line??
Biotele (author)  setinight5 years ago
You don't need a flyback for that! Just make a flat pancake coil and hook it directly to the CLF. Put a capacitor in parallel with the coil to make into a resonant tank. The pancake coil will resonate and will heat inductively anything in the vicinity. You will need to experiment with the number of turns and capacitor values for the optimal set up.
Cool, sounds a lot easier than what I was trying with the flyback. Will that work as well with the coil coiled into a tube instead of a flat pancake? I want to heat up rod shapes with it. Thanks!
setinight5 years ago
How do you find the diode to disconnect it for AC use?
Biotele (author)  setinight5 years ago
Good question. The diode is buried in the plastic casing. You can try to hack it off, but you might ruin the flyback. I suggesting googling looking for somebody who tried it. The easiest thing is to buy an old B/W TV, the flyback back then was seperate from the diode. Or just look on ebay for old flyback. Please inform me about your results.
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