# High voltage ignition coil supply

In this Instructable I will teach you how to build a High voltage power supply using an Ignition Coil.This project uses a 555 timer based circuit.We use a 555 IC because an ignition coil needs a squire wave signal to power it. so basically the 555 timer is making pulsed DC electricity which powers the ignition coil.
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## Step 1: Danger High Voltage!!!

This project shows how to make a High voltage power supply which produces about 30 or more MA, which is enough to Kill you! so Don't try this if you are not experienced with high voltage!

## Step 2: Getting an ignition coil

The first thing you need to do is to get an ignition coil,I got mine from a friend who's dad works on cars,but you can buy a new one for like \$30, Or you can get one from the junkyard for about \$5.The reason we use an ignition coil is because ignition coils are what power the spark plugs with high voltage. so instead of hooking it to a spark plug you can use it as a high voltage supply.

here is a pic of the two ignition coils I got.

## Step 3: The driver circuit scematic

This is the driver circuit that powers the ignition coil .
part list:

two 10k ohm potentiometers
two 1k ohm resistors
one 555 timer IC
one 8-dip IC socket
one 100 ohm resistor
one .1uf 12v capacitor
one 2n3055 power transistor and heatsink
12v 6amp DC power supply

## Step 5: Solder all your components

now you need to solder all your components using the schematic.

## Step 7: Finished!

now your finished! now just turn on the supply and adjust the frequency using the potentiometer until you get a good arc! you can use this to: power a Tesla coil, power a Jacobs ladder, and much much more!
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rdstarkrishna8 days ago

Thank You in advance , i built one circuit which provide frequency puls of 100-400hz but ignition coil is producing only 1.4kv maximum when i viewed through CRO please help me. WIth same pulse with EHT i am able to produce 10kv y in ignition coil its droping.

short stack1 month ago

is it possible for me to use a car battery and instead of the 1uf 12v cap using a 1uf 16v

9 days ago

there's nothing wrong with using a capacitor with a HIGHER voltage rating... However, using a lower rating can be tricky. In this case, I would say yes, 12v is fine. And the Instructable asks for a 12v, 6a power supply, so a car battery is more than enough. It will work fine.

codeym1 month ago

I made something similar, but I use 110 volts. I use a dimmer switch in series with a 175 volt 11 microfarad motor capacitor and connect that to an ignition coil. I get thick arcs about 4 inches long. It sounds like a taser on steroids.

MandeepC3 months ago

i required +/-15 v to drive IGBT. I have made one circuit in which i required +15 volt when input is high(+5v) and -15 volt when input is low(0). this input is not continuous it is only the pulse input.i have made circuit as per below, but it doesn't provide +/-15 volts. so help me

MandeepC3 months ago

i required +/-15 v to drive IGBT. I have made one circuit in which i required +15 volt when input is high(+5v) and -15 volt when input is low(0). this input is not continuous it is only the pulse input.i have made circuit as per below, but it doesn't provide +/-15 volts. so help me

MandeepC3 months ago

i required +/-15 v to drive IGBT. I have made one circuit in which i required +15 volt when input is high(+5v) and -15 volt when input is low(0). this input is not continuous it is only the pulse input.i have made circuit as per below, but it doesn't provide +/-15 volts. so help me

i've got plans to build one of these eventually. Glad to see you're getting good sparks from yours. The reason 555s are dying in the back EMF from the coil. When the transistor turns off there's a WHOMPING great spike shoved up the power rails. This takes out the 555. Put a power diode across the coil with the cathode (pointy end, with the band) to the 12V rail. Also a 1000 microfarad 25V or so capacitor across the rails would help smooth out the load on the power supply and could give you better sparks.
8 months ago

Is this what you mean about the diode? i keep smoking the timer. thanks!

ARJOON4 years ago
i used an irfp250 instead for the 2n3055. i got far much bigger spark and also when i used 32v of input to the mosfet the ignition coil was sparking to the concrete. the was super crazy. like a tesla coil. haahahahaha
8 months ago

When you used the irfp250 did you connect it the same has the 2n3055 like this? or did you change anything? thanks!

8 months ago
yes like this but substitute the 100R resistor to 150R else the gate will be too saturated
3 years ago
I agree on your choice for using IRFP250n as not only a mosfet has a better rise/fall time in other words is more capable for fast switching, but it also incorporates a flyback diode for protecting the drive transistor from back EMF blowing all the circuit to nothing. A steering diode at the supply input would also be a wise idea to protect the circuit and improve commutation.
3 years ago
can i use a IRF510 Transistor
3 years ago
it think it should work
3 years ago
becuase it basically is a mini low voltage tesla coil If you think about how it wroks they are both very similar.
josh13243 years ago
I noticed the coils negative terminal is connected to positive, and vice versa, is it supposed to be like this?
2 years ago
That portion is backwards, everything except the + and - on the Ignition coil is correct, just flip the two
techno guy2 years ago
This doesn't work, I already fried 3 555 timers because of how the negative is connected to the chip and the high voltage goes into the chip and fries it.
2 years ago
I have the same problem, can anyone reply to this post with a good answer because its either the 555 chip for me, or the power plug, both of which fry when I change the POTs
wolf9962 years ago
I've Been Super Shocked And I Was Like Pikachu For A Few Days I Touched My Friend In The Neck And Burt Him Thank You For Electifiying Me
2 years ago
were u be able do attacks like stainless steel tail or concentrated hit ??
2 years ago
Yes And People Kept Throwing Pokeballs At Me
Techno Dude2 years ago
Just yesterday I got an 2n3055 transistor but then also the ignition coil dint work can some one pleas help me?
2 years ago
try flipping the polarity on the auto coil (its wrong in the schematic)
Techno Dude2 years ago
I am trying ti build a tesla coil ,but today when I tried your driver circuit but instad of 2n3055 tranisistor i used an irfp250 transistor it dint work. what do u think I
have to do
cdousley3 years ago
and does it matter if i get a capacitor with i higher voltage rating
3 years ago
a capacitor with a higher rating will work just fine too. the rating on a capacitor just shows the maximum voltage it can handle. if your voltage is above it, your capacitor is gonna break.
3 years ago
Don't you mean explode, smoke, or spray electrolyte all over the place? :P
Capacitor smoke is a smell that lingers around the workbench long after the cap dies.
3 years ago
yes, yes it is.
safetec3 years ago
I have a question: Can the 2n3055 power transistor be replaced with any other transistor? and also can this circuit be run using for example a standard 9V battery to produce a little less current? Is there anyone out there that can perhaps propose a circuit using a cellphone charger's transformer to boost the V output?
3 years ago
The power transistor is probably there due to the inductive kick when the magnetic field in the ignition coil collapses. Or it could be the frequency it's switching. I've had problems with a 555 switching a camera flash transformer with a generic 2n2222 NPN signal transistor. The tiny little plastic case can't dissipate heat (well, not much anyway) and ended up melting on me.
takide3 years ago
do you know what the operating frequency of the ignition coil is?
cdousley3 years ago
can i use less than 6 amps i know i wont get as high of a voltage but i wouldn't want something this powerful until i had some more experience.
highvoltageguy3 years ago
u get ignition coils the same way as i do i have two
ge6aaaa33 years ago
How can i make bigger spark?
hinmung4 years ago
can replace the car ignition coil with motorcycle ignition coil ??? and any bad things happen such as the 555 timer explosions.
4 years ago
a motorcycle needs roughly the same voltage too and no changing the coil is not going to blow the 555
mbainrot4 years ago
You do know that the image on step 1 is in breach of copyright?

http://www.powerlabs.org/highvoltage.htm is the owner of the image, you've just cropped it so the "(C) http://www.powerlabs.org"

Do you have permission to use that graphic?
ARJOON4 years ago
what can i do if i want 400v from it
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