How to Get 100KV Out of Your Flyback!!! VERY SIMPLE SETUP





Introduction: How to Get 100KV Out of Your Flyback!!! VERY SIMPLE SETUP

I saw this instructable on how to make a high voltage power supply with a CFL ballast circuit and and a long time after that it hit me, instead of breaking all my parents light bulbs why not use an electronic ballast? So I tried it and I was blown away by the results for, what would normally be a rather large circuit (not the CFL, a circuit with the equivalent power), just a ballast. *sorry about the blurry pictures, I had to turn the flash off on the camera and it messed up the pictures a little. Also I didn't get very many pictures because I had already made it before I got the idea to make an instructable.

NOTE: I see a lot of people burning up their ballasts or getting very poor results. Im not sure why but some ballasts just dont like it and some transformers dont give very impressive sparks. My advice would be to do some quick tests in open air without oil, if it works then set everything up, if not then try different ballasts/transformers. And this will eventually kill your ballast no matter what kind it is, mine lasted for a while though.

-=DANGER HIGH VOLTAGE: do not attempt if you dont have very much experience with high voltage=-

Step 1: Hook Up the Primary

I have an instructable for finding the primary and secondary windings on a flyback but you wont need to follow that for this setup. The first two pins on the transformer should be separated a little further than the rest, the are your primary, hook up the ballast to these and test it just to make sure, there should be lots of corona and will probably arc to the other pins. NOTE: do not let it arc for very long or the insulation will fail in a matter of seconds!!! You dont have to use a flyback with a core encase you have any broken ones but the results will be pore. 

Step 2: Insulate It

Because flybacks cant hold such a high voltage your going to need to submerge it in oil. Before you do that solder wires to your primary's and cut a length of the high voltage wire from the out put and solder that on the second output pin. I find that the small plastic Folgers containers wok well. After you have selected a container to put your transformer in and have soldered all the necessary pins put the transformer in with the wires sticking out of the top and fill it with oil until it covers the entire transformer. You can use vegetable oil, mineral oil, hydraulic fluid, and maybe motor oil but I'm not sure, I used vegetable oil and I'v been using this thing non-stop and it works great. After that cut holes in the lit to put your wires through and then do just that. After every thing is in place hot glue the wires to lid and the lid to the container to keep oil from leaking, make sure everything is dry or the glue wont stick. 

Step 3: Try It Out!!!

The first part of the video was when I first made it, as you can see it arced to the next pin and caught on fire, in the second part I was using the oil filled Folgers container.


  • Hey i have made it t...-Kutluhan

    Kutluhan made it!


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I used a MOT (Microwave Oven Transformer) as a replacement for the flyback and got a 1 cm spark. I used the ballast but it fried my flyback either due to to much voltage on the secondary or too many amps in the primary and I did submerge it in oil but it just wont work anymore so i have to trash the flyback. I used a older ballast that only had two wires coming out of it and those were the hv wires . So I hooked those up and it fried it so i went back to my MOT and I need to submerge that in oil.(sorry for the typos)

Yeah, it didnt take too long to kill my flyback from this, but certainly worth it. 6 years after build this I now have a box full of them, even after selling a bunch.

Please see "Fire Extinguisher using Voltage Multiplier"

thats pretty cool, I love corona wind

The electronic ballast puts out 600 volts... It has to be high frequency pulsed dc or ac, if not, it would not be able to run a flyback... Imagine how much you can get out of a flyback that usually runs on 12 VDC pulsed ?? I think the Fluorescent light ballast would have to have low current with voltage that high.. The ballast shown above is NOT a CFL ballast.. It is a fluorescent tube light ballast.. I know for a fact that CFL ballast are HF 600 volt pulsed dc..

can I use 2 pin ballast to this circuit

I've obtained this ballast.

Will it work with my flyback?

It has a "Starter". Any knowledge about it working or not will be appreciated. TY


in the ballast there is a small glass tube (you will have to open it up)that is called the starter it will flip an internal switch. You can take out the tube if you want.

I have since made other flybacks and abandoned the use of this ballast. I did find that the glass tube/starter was attached in series with the external wiring. I just removed it from the circuit when experimenting, to no avail for use with my flyback. It is now a fixture in my parts bin for any projects in the future.

Thanks for your input on the subect. I appreciate any knowledge that others take the time to share.

I havent tested very many ballasts, I just know for sure the one I used works. All I can really say is some might, some might not, it doesnt hurt to test it though.