Easy High Voltage Power Supply

First off , here is a video a video I made in case you get stuck on any parts:

Okay now time for a safety rant,
Disclaimer: this is dangerous, be very careful with it as it could easily mess you up. And by that I mean it may even kill you if handled unproporly
Now with that said, let's get started!

Step 1: Watch the Step by Step Video

Watching the video is a good way to better understand what you are doing, and with the instructables hand in hand, should hopefully make a more stress free build, so here it is!

Click on this for the Video

or use this link ------> https://youtu.be/k5uNa13Li1I

Step 2: Parts Needed

1 fluorescent light ballast
1 flyback transformer ( easily salvaged from a crt tv )
1 switch ( able to withstand mains voltage ) I got mine from an old vacuum
1 cylinder can ( I used a tang powder container )
And basic soldering supplies

Step 3: Getting the Flyback Transformer

As seen in the image, this is a flyback transformer, it provides a cat television with high voltage needed for the electron gun's field.
You will notice a wire coming out of it stuck to the tv with a suction cup, stick a grounded piece of metal under the suction cup, this will discharge the held capacitance.

Now that you have done that, remove the suction cup and de-solder the flyback transformer from the board. I use a solder pump, but it would be easier with desoldering wick. Once you have the flyback transformer off the board you set for the next step!

Step 4: Assembling the Circuit

Okay, first off look at the pin layout of the flyback transformer ( the image I have ) how take the power cord to the crt tv, or just any power coward to mains, and connect it to the white and black wire of the light ballast, ( remember this is AC so it doesn't matter which goes to which ) however , in between one of the mains and the black wire to the ballast, put your switch.
Now take the 2 blue wires and connect them to pin 1 of the flyback transformer
Take one of the yellow wires ( yellow is ground ) and connect it to pin 2

That's all for the circuit !

Step 5: Finding the Second HV

The wire that has the suction cup is your first high voltage, to find the second high voltage, turn on the circuit, and using a stick, bring the suction cup wire down the the pins, and see which pin it arcs most easily to, and that's your other high voltage spot, solder a wire to it and use electrical tape or heat shrink tubing!

Step 6: Putting It All Together

Okay ! Take that tang can and make cover it with black paper, now put all the components in, and cut a hole for the switch, and mains wire. How feed out the 2 high voltage wires through holes poked in the lid
- make sure everything is insulated, if you use a good container, fill it with transformer oil.
Otherwise just be extra careful.

I put a high voltage sign on mine, and you should too! As it is dangerous. Also this will hold a charge so be sure to discharge it when you are done.

Now you know how to make a easy high voltage power supply! Be safe and have fun!



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    11 Discussions


    1 year ago

    Can i use this project with 230 volts


    2 years ago

    how many volts is the flyback?


    Reply 2 years ago

    sure! Only I'm not quite sure what you mean by that, do you mean why it works the way it does?


    2 years ago

    This project is highly dangerous to operate. The author should have put a disclaimer to that effect.

    3 replies

    Reply 2 years ago

    Thanks! Good work tho... I don't know who won't be fascinated by some Good high voltage for hobby use.


    Reply 2 years ago

    it depends greatly on the size of the flyback you use, generally bigger = higher voltage, also if you wind your own primary the amount of turns come in to play as wel. But with this , about 20kv to 40kv I would guess