Introduction: High Voltage Ignition Coil Supply

Picture of 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.

Step 1: Danger High Voltage!!!

Picture of 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

Picture of 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

Picture of 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 4: Gather All Your Componments...

Picture of Gather All Your Componments...

There are a few components that are missing from this image because I ordered them and they are not here yet.

Step 5: Solder All Your Components

Picture of Solder All Your Components

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

Step 6: Hook It Up to the Ignition Coil

Picture of Hook It Up to the Ignition Coil

now you need to hook up the the power supply to your circuit,and then the out put of the circuit to the ignition coil

Step 7: Finished!

Picture of 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!


pejipejman (author)2015-02-28

why dont you use a trap for the frequncy by measuring the frequncy ?
you can put it right behind the transistor and the negative should isolate the negative line with the spark.
i draw it in the schematick below.

rdstarkrishna (author)2014-12-10

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 stack (author)2014-10-21

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

LiamOSM (author)short stack2014-12-08

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.

codeym (author)2014-10-28

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.

MandeepC (author)2014-09-08

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

MandeepC (author)2014-09-08

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

MandeepC (author)2014-09-08

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

AndyGadget (author)2009-07-09

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.

ranman260 (author)AndyGadget2014-04-18

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

ARJOON (author)2010-11-26

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

ranman260 (author)ARJOON2014-04-03

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

ARJOON (author)ranman2602014-04-05

yes like this but substitute the 100R resistor to 150R else the gate will be too saturated

jesteract (author)ARJOON2011-12-04

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.

bswt (author)ARJOON2011-08-17

can i use a IRF510 Transistor

ARJOON (author)bswt2011-09-04

it think it should work

yamaha_dodge (author)ARJOON2011-01-22

becuase it basically is a mini low voltage tesla coil If you think about how it wroks they are both very similar.

josh1324 (author)2011-10-04

I noticed the coils negative terminal is connected to positive, and vice versa, is it supposed to be like this?

deej397 (author)josh13242012-11-29

That portion is backwards, everything except the + and - on the Ignition coil is correct, just flip the two

techno guy (author)2012-04-06

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.

deej397 (author)techno guy2012-11-29

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

wolf996 (author)2012-05-23

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

rowanvheeswijk (author)wolf9962012-07-26

were u be able do attacks like stainless steel tail or concentrated hit ??

wolf996 (author)rowanvheeswijk2012-10-27

Yes And People Kept Throwing Pokeballs At Me

Techno Dude (author)2012-01-08

Just yesterday I got an 2n3055 transistor but then also the ignition coil dint work can some one pleas help me?

TeslaBoy (author)Techno Dude2012-03-26

try flipping the polarity on the auto coil (its wrong in the schematic)

Techno Dude (author)2012-01-07

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

takide (author)2011-04-25

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.

S33PlusPlus (author)takide2011-07-02

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.

takide (author)S33PlusPlus2011-07-03

yes, yes it is.

safetec (author)2011-06-06

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?

S33PlusPlus (author)safetec2011-07-02

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.

takide (author)2011-04-25

do you know what the operating frequency of the ignition coil is?

highvoltageguy (author)2011-04-06

u get ignition coils the same way as i do i have two

ge6aaaa3 (author)2011-01-02

How can i make bigger spark?

hinmung (author)2010-11-27

can replace the car ignition coil with motorcycle ignition coil ??? and any bad things happen such as the 555 timer explosions.

bcantley2010 (author)hinmung2010-12-16

a motorcycle needs roughly the same voltage too and no changing the coil is not going to blow the 555

mbainrot (author)2010-12-03

You do know that the image on step 1 is in breach of copyright? is the owner of the image, you've just cropped it so the "(C)"

Do you have permission to use that graphic?

ARJOON (author)2010-10-12

what can i do if i want 400v from it

Jimmy Proton (author)ARJOON2010-11-26

you cant get 400v from it, its a high voltage transformer

gafar musa (author)2010-09-27

wow,this is interesting but am thinking of 1 how to measure d output, 2 how to use this circuit to power electronics or two or more bulbs. is d output voltage AC or DC?.
Any one with idea should help me send d contribusion to

carebare47 (author)2010-06-04

When I run this the transistor gets hot very quickly, and the spark generated is minuscule and only happens every second or so. Any ideas?

on car ignition coils there is always a special capacitor called a condenser and if u add this to ur circuit and put a heat sink on the transistor then you will have a good high voltage power supply

N3v3rm0r3 (author)2010-05-26

How do you connect the power transistor? It has two pins and I don't what they are for. Also, is it my idea, or it lacks a pin?

skuitarman (author)N3v3rm0r32010-06-09

the other conection is the transisters metal cover

N3v3rm0r3 (author)skuitarman2010-06-10

thanks, the two pins are the collector and the emitter of the transistor and the cover the base?

coolfordy (author)N3v3rm0r32010-06-10 this has a diagram of what is what on the transistor

coolfordy (author)2010-05-29

how many watts are the 10kohm pots rated for ? and what would be the best diode to prevent kickback?

joinaqd (author)2009-04-07

can it light up a strobe light from a disposable camera??

Plasmana (author)joinaqd2009-04-16


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