Picture of How to build a Tesla Coil
This Instructable will walk you through building a medium sized Tesla coil.

Step 1: DANGER

Picture of DANGER
Unlike some other high voltage experiments, a Tesla coil's streamers can be very harmful. If you are shocked by the streamers, you will not feel pain, but your circulatory and nervous system can sustain severe damage. DO NOT TOUCH IT WHILE ON UNDER ANY CIRCUMSTANCES.

Also, I don't take any responsibility for you hurting yourself.

This isn't to say that you shouldn't get into high voltage though, its just that if you are planning for this to be your first HV project, its a little to involved. Instead, try out a nice microwave oven transformer, and be safe!
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gencodeinc3 days ago

Can a commercial capacitor be used? if so what would I look for?

Glenn7815 years ago
 for the love of god do not use 6 snapple  jars with a 15kv 30ma nst you will get about 10 min of run time out b4 1 or more blow!!! all 6 were leaking badly. i think ill try a serise/parallel with 12 of them
DevCoder (author)  Glenn7815 years ago

I just fixed the Instructable!
Bro could u help me but explaining how to do that in a video chat
Bro could u help me to do my project
HaykD Glenn7815 months ago

Why do they leak? Isn't there any way to prevent leakage. Or how you know that caps are leaking?

Glenn781 HaykD5 months ago

they would leak at the top of the foil with streamers moving to the lip of the bottle at 15kv

HaykD Glenn7815 months ago

But as i see from your picture that they are too far for arcing at 15kv if considering that you need 1kv per 1mm to break the air. Anyway is there a way to correct it?

Glenn781 HaykD5 months ago

there is far more then 1.5 cm gap! It was do to leaking. When it leaks you will see dim looking feelers bleed from the edges of the foil

how many volts will one of the snapple bottles produce?
lol!!! good thing you did cause I have 4 litle girls in my house, is it ok if i use 9 small mouth pint jars instead?

(i only would have done 3)

thanks alot for makeing these instructions.

ps i couldn' comment on the right one so this is for DevCoder
DevCoder (author)  electridanger4 years ago
Anyone interested in helpin me i just want how to connect all parts
Can i contact u or can u give me a.live video how to make it
Can i contact u or can u give me a.live video how to make it
Can i contact u or can u give me a.live video how to make it
Can i contact u or can u give me a.live video how to make it
I have science fair in my school so i want to make it can u help me but giving guidence how to make it
I have science fair in my school so i want to make it can u help me but giving guidence how to make it
I have a dought u told to connect 8 or 12 bottles right we can connect 6 of them as u shown can u plz tell how to connect 8 or 12 bottles . with picture
AdrinA123 days ago

What is nst?

No one knows.

neon sign transformer

Please make a tesla coil using 12v.Which is known as slayer exciter

AdrinA123 days ago


red_green1 month ago

Uhh, now that I look at this diagram again, wouldn't you want the capacitors in parallel with the NST and the spark gap in series?

have you tried lighting a fluorescent bulb? does it work

gencodeinc5 months ago

Finished my secondary winding, does the bottom of the secondary winding wire connect to anything or should I just cut it off flush to my pvc?

it connects to ground.

Thanks, I assume you mean a grounding rod outside or can I use a wire to the house ground?

derekiswise3 months ago
I am sorry for the stupid question but how do I physically connect the capacitors to the coil. Wouldn't using capacitors with alternating current cause this top cancel out? Could you very a close up picture of how it is connecting. Sorry about this, any help would be great, I am building one this summer
gencodeinc6 months ago

Does the winding direction matter?

Cuanto tiene que medir el tubo de pvc y el de cobre

Also, what wire is used for connecting the NST, capacitors, spark gap, ect...

Also, how can I ground the primary and the secondary coil if they can't be grounded in the same area?

what is the "1.5" PVC screw-thing" used for?

ZariusI7 months ago

You should try to update your directions cause they are hard to understand and how long should are bolts, washers, nuts, wood and PVC pipe should be. Also what is a circular, smooth metallic object for the discharge terminal is what did you use ..maybe a metal bowl. But anyway thanks for making this and tell us were to go for the next Tesla Coil.

gencodeinc8 months ago

Is there an alternative to using Snapple for the capacitor.

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