How to Build a Slayer Exciter

Picture of How to Build a Slayer Exciter

A Slayer Exciter is an air-cored transformer that steps up a very low DC voltage to a very high AC voltage. This creates an electromagnetic field around the coil that is capable of lighting up fluorescent and neon light bulbs. It is fairly similar to a Tesla Coil.

The Slayer Exciter was the brainstorm of Dr. Stiffler and GBluer a few years ago. It has since been modified and improved, resulting in a community of people whose hobby is to revise and improve them.

In this Instructable, I will show you how to build a small Slayer Exciter and will also give an explanation as to how it works.

There are several parts that make up a Slayer Exciter:
- The power source supplies the voltage and amperage.
- The driver circuit takes the electricity from the power source and prepares it for the transformer.
- The primary coil creates a magnetic field from the electricity.
- The secondary coil converts the magnetic field back into electricity and steps it up to a much higher voltage.
- Finally, the top load acts as a capacitor, greatly increasing the strength of the electromagnetic field.

The whole project only costs about $15 and can easily be completed in a weekend. It can be used as a centerpiece for the dinner table that will "wow" any family members or guests. It is also easily transportable which can make it a great conversation starter if you choose to bring it to school or work.

Here is a video of it in operation!

The Slayer exciter creates an electromagnetic field that may negatively affect electronic equipment in the immediate area; including pacemakers. Exercise caution and common sense when operating a Slayer Exciter.

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AnubhabC made it!12 days ago

Hey Chip Fixes,

I have used 2 nine volt batteries. 1 LED(in place of diodes). about 1200 turns in L2 and 15 turns in primary coil(lower turns doesn't work properly). I am not sure of the value of the resistor i am using and no capacitor But the results are not satisfactory!

It is too weak as you can see in the images! What can i do? Whats your suggestions?? There is a detailed description here:


i tried to make it but at first the transistor was becoming very hot.. then i changed the poles or ends of the primary coil but it still did not work...... i supplied a 6v - 2 amp dc supply . the secondary coil was more than 1200 turns and primary was 8 turns... i used 1N4007 diode instead of the UF 4007 diode but all the other things are same... i tried to glow a 5watt - 220 volt cfl lamp ... please help me out

can i use a 26 awg wire as secondary and a 18 awg wire as primary???

what is to be the output voltage for wireless transmission??

please suggest a method o contact you other than instructables...

hi, Chip Fixes,

i cant get my slayer exciter to work.i did the same as you winding looks perfect.when i bring any bulbs near it,it wont light up.The current is flowing through the circuit.

Once the bulb had lighted,but was very faint. but then it wasn't lighting at all.It did not work.the components are working fine(tested using multimeter).

I think primary coil is the problem.I dont know how to adjust it...Please help...??

mine also has a heat sink and am using 18v.

Chip Fixes (author)  ferdinand00221 month ago

Try reversing the leads of the primary coil, you can also try using less turns on the primary. If that does not help, the transistor may be the problem.

Thanks sir, but i am getting reading in my multimeter. The current isn't ionising the air and the CFL is not lighting.once after experimenting a lot, i got an led of about 3v to light faintly.i tried decreasing the no:of it is about 3-4 turns.with 18v.i am doing this for my school project.
i thought it was the problem of the top load as i used a torroid shape in the place of a sphere shape, and i changed to sphere. Any solution??

okay I have to add this. I did something totally cool with mine. first I got 1/4 cup of salt, opened a yellow highlighter and rubbed salt all over the ink cartridge until it was all yellow. once it was completely dry I put it into a small metal cup and placed in on the topload. I turned off the lights, turned on a black light and powered it up. the result was a spectacular fluorescent yellow fountain about 3 feet high!!!!
I wasn't able to get a good photo but I can post this without one, so I'm using the original one of my exciter.

Chip Fixes (author)  Doctor90250 1 month ago

Oh that's really cool! Could you get a video? I've seen salt added to high voltage outputs but never anything like that.

Hi chip,
Once I build the new one I will certainly try to get it on video.
Another way of doing it is with a van de graff style electrostatic generator, or anything that has a fairly decent ion wind.

I built this using a TIP 122 transistor, and rather than winding my own secondary coil, I used a TV flyback transformer.
I wound about 8-10 turns of enamelled wire around the ferrite core. forgetting how much current my 12v regulated power supply put out, I tried powering it with that. let's just say that that transistor was not too happy about, and exploded with a violent BANG!
Now that I've recovered from the heart attack, it's back to the old drawing board. this time I'll use a wee bit less amperage, lol.
I did, however, on the first run, use a 9v 700 mA transformer just long enough to hear that wonderful high pitched hiss that flybacks are known for, before soldering it all together and returning my wife's DVD player to her. Suffice it to say, it works great! thank you for an awesome 'ible.
(in the 2nd pic you can see the hole in the transistor. I added that one for the chuckle factor, lol).

Chip Fixes (author)  Doctor90250 1 month ago

Thanks for sharing and that is an impressive failure hahaha. I think the reverse EMF from the flyback may have been the primary cause of the transistor exploding. If you were to add a safety diode between e and c of the transistor, it may last longer.

deba1685 months ago
sorry..the message was not complete. can i make a plasma globe by placing a incandescent light bulb instead of top load..

I've done that using a large clear bulb, the big decorative ones. smaller bulbs may work but usually are just vacuum, whereas the larger ones have one or more gases added like argon, krypton, or neon. this allows you to see the streams of plasma created by the electrons flowing through them.

Chip Fixes (author)  deba1685 months ago

Well it won't be a plasma globe but yes it would work.

shawn1311 year ago
ummmmm, newbie question here.
Is there a way to know which terminal in a transistor is which without a multimeter just by looking at it?
I know the base is the middle but what about the other two?
great work though.

hi Shawn, I usually Google the data sheet for transistors that I've pulled from something else.

Chip Fixes (author)  shawn1311 year ago
Yes, if you hold it so the black part with the writing is facing you, and going from left to right: pin 1 is the base, pin 2 is the collector, and pin 3 is the emitter. The middle pin is the collector, not the base! The first page of the datasheet shows you which pin is which:
nrockzz2 months ago


I have done everything same except, the diameter of pipe is around 0.75 inch...does it matter??? we have around 500 turns... Still no bulb is glowing and transistor is taking too much heat in 13v itself... while connecting multimeter primary is giving only very less voltage (0.2 V ) while applying 15 V as input... pls help .... A led connected is glowing at 15 v with low intensity...

Chip Fixes (author)  nrockzz1 month ago

The size of the pipe does not matter. You could try flipping your primary leads around to see if it makes a difference? I assume you're using a TIP31C transistor?

In order to increase the resistance of the resistor do I need to go up watts or ohms?

Chip Fixes (author)  Thomas Pagonis3 months ago
What would you recommend? Is 100 ohms ok?
Chip Fixes (author)  Thomas Pagonis2 months ago

100 ohms will not work because it's too small of a resistance, I would try a resistor in the range of 10k - 50k ohms.

I need help! I did the same slayer exciter and does not work and I think it's because the circuit is just like yours but I do not understand is what does not work .... because it takes two diodes? have some mail for you can send pictures from my slayer exciter, to help me.


Chip Fixes (author)  jprado costoyas2 months ago

The Slayer Exciter does need two diodes to work properly. Have you tried switching around the primary coil leads?

parkm20714 months ago

Hi, what's that thing called, for the circuit, that everything else is on top of? Like a copper color and where can I buy one? I'm sorry, but I'm an amatuer at all of this... Please reply soon! This is due for me in 5 to 6 days, thanks!

Chip Fixes (author)  parkm20714 months ago
PCB, you can find it on eBay, you can also use a breadboard.
Is it possible to do without it?
Chip Fixes (author)  parkm20714 months ago

You can use a breadboard or solder point-to-point, but the point-to-point method will be more difficult

Elsam asare4 months ago
hello chip, i'm having a problem with my exciter i believe it's from the circuit but i don't know how to fix it
Chip Fixes (author)  Elsam asare4 months ago
What's the problem?

the bulbs don't light when i bring them close to the exciter

Chip Fixes (author)  Elsam asare4 months ago

Try flipping the leads on the primary where they connect to the circuit.

please can u help me with the circuit, I used TIP41C transistors

rgalindo14 months ago

hi, I have a problem with my Slayer Exciter, doesn't work, I used 22 AWG in coil L2 and when had around 350 turns I returned the wire in the same direction for to have 1050 turns, it possible do it? or it is coil necessary one direction.

Chip Fixes (author)  rgalindo14 months ago

Try flipping the primary leads around where they connect to the circuit.

pharish14 months ago

Eureka! We've got the output! Thanks Instructables..

dogucan974 months ago

I'm making this version of the Slayer Exciter. I'll use 1,5 mm (about 15 AWG) wire for the primary coil (8 turns) and the circuit, and 0,25 mm (30 AWG) for secondary coil (400 turns). The circuit parts will be the same as yours and the one in the video. And I want to use a power supply instead of batteries. I went shopping for it, but I saw many different kinds of power supplies. And now, I'm asking you for some details about the power supply that I should use. I know about the voltage, and I know that I should get a DC power supply, but what about the amperage? There were power supplies with different amperages. What should be the amperage on the power supply I should buy? I'm not in the US, so, give me details, not an exact model or anything. Also, it shouldn't be too expensive.

Chip Fixes (author)  dogucan974 months ago

Okay cool, feel free to make the secondary coil more turns. 500-1000 is a good number for a high output.

In terms of the power supply: You want one that can deliver at least 1 amp, 2-3 amps would be great if you can afford it because that way, you can use it for other projects. Also, my power supply is a variable one so you can set the voltage to between 0 and 36 volts. If you can't find a cheap variable power supply that can supply at least 1 amp, I've found that laptop power supply's (which you can get on Ebay or Amazon) work really well. I would get the 12 volt or the 18 volt laptop charger and then you just cut off the connector so you have a negative and positive wire. Let me know if you have any other questions.

nirep5 months ago
Hi, i just got TIP31B and TIP32B transistors. Will it work?
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