How to Make High Voltage Capacitor for Tesla Coil

This is my instructable on DIY HV Capacitors and how to make them.

Please follow all instructions step-by-step if you have any questions feel free to ask.

For more Experiments with high voltage visit:

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Step 1: What Do You Need to Make HV Cap?

All what you need is :

  2. kitchen aluminium foil,
  3. electrical wire
  4. electrical tape

Tools for the job:

  1. scissors
  2. wire cutters

Yes,that is all what you need and most of the things you can find at home or buy very cheaply :)

If you interested in High Voltage Projects visit : you will find there how to make Tesla Coil ,Bedini Generator plus you can learn how to build Free Energy devices!

Step 2: How It Look Inside.

You can make it in just few minutes and it is very easy :)

Here you have basic design how capacitor look inside helpfully it will help you to understand how to do our

HV capacitor.

Step 3: Almost Done :)

Now what you need to do is just adding layers one on top of the other and dont forget to attach wires to each layer of aluminium ,first strip insulation and connect them with electrical tape .

Step 4: High Voltage Capacitor.

Now you have high voltage capacitor for your High Voltage experiments.

My capacitor reach value of 1300pF and can easily work with voltage around 50,000 volt and above in fact I never manage to damage them . For me they are one of the best capacitors.

To learn more about High Voltage Experiments visit my website:

Just to give example what I do with my capacitors:



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    7 Discussions


    Question 7 months ago

    Can I get some measurments for the parts?


    3 years ago

    I did something stupid for my high voltage capacitor. 2 graphite rods
    coated in wax. Paper cloth coated in salt water. Tape together. Suspend
    from pencil in glass jar. Microwave to charge. I got a good enough jolt
    from it not to try it again. I did not save any pictures of the thing.


    3 years ago

    GREAT, ..... I know how now BUT, ...... have you ever thought some of us require the measurements???????


    Reply 4 years ago

    Silly question... where did you find the excellent Tesla image?


    4 years ago

    Nice build!
    I usually use strips of tinfoil and packingtape but it's hard to get the airpockets out.