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 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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parkm207120 days 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)  parkm207120 days ago
PCB, you can find it on eBay, you can also use a breadboard.
Is it possible to do without it?
Chip Fixes (author)  parkm207120 days ago

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

Elsam asare23 days 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 asare23 days ago
What's the problem?

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

Chip Fixes (author)  Elsam asare20 days 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

rgalindo11 month 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)  rgalindo120 days ago

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

pharish11 month ago

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

dogucan971 month 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)  dogucan971 month 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.

nirep1 month ago
Hi, i just got TIP31B and TIP32B transistors. Will it work?
Chip Fixes (author)  nirep1 month ago


Judes D1 month ago

Hi Chip,

I'd like to try out this project 'coz it really cool man. I just wanna know for how much time this slayer exciter works with two 9V batteries.

Reply soon...:)

Chip Fixes (author)  Judes D1 month ago
If you're wondering how much time two 9v batteries will last powering the Slayer Exciter, I believe they would last between 2 and 4 hours of continuous run time.

Thanx chip. Purchased all the materials. How many days do you think it will take to complete this project? Is it possible to complete in a single day?

Chip Fixes (author)  Judes D1 month ago

Yeah you could complete in a day or 2. The most time consuming part is winding the coil.

dogucan972 months ago

I'm going to do this, and now I'm shopping for the parts. So far, I found all the the ingredients, but then, I found 3 different kinds of resistors. One of them is a sandstone resistor with 5W wattage, the other is a metal film resistor with 1/4W wattage, and the other doesn't say what kind it is, but it has 1W wattage. Which one should I buy? Also, there is a pic for the third one:

Chip Fixes (author)  dogucan972 months ago
1/4w is fine. 5w will work (I think) but it's way overkill.
But I ordered the 5w about an hour ago. Anyway, I hope it works this way.
(removed by author or community request)

Nevermind. I'm buying the 5W sandstone resistor.

deba1682 months ago

hey chip...finally its works... I replaced the 47k resistor by 56k...tested by 6w tubelight and 8w cfl both are glowing @ around 1' range .power supply is 6v lead acid battery..

thank you so much...

deba1682 months ago

I used TIP 41C transistor with heat sink ,IN4007 diode and 47Kohm 1/4W resistor..power supply is two 9V battery in series...

deba1682 months ago

I made this slayer exciter..L2 is arround 1.3' used 30AWG wire..the circuit is also fine but its not working.I have also interchange the primary lead but still not working.whats the problem..? is my top load is too large..or the 2to 3 turn operlaping in L2 is the cause ..??

Amator22 months ago
Hi there, I have a question. I have a very thin insulated wire like hair like, that i took from a transformer, and i winded 750 n on a 0.70 inch diameter tube.
Is that a good layout for the secondary coil? 5 turns of this wire is like 1mm...?
I love your project because is simple and i have plans to use itso..
Thanks allot man.
Chip Fixes (author)  Amator22 months ago

750 turns? It should work, try it and see. I would start with one 9v battery as the input and then move to two to make it 18v. Remember that you may have to flip the primary leads around. Good luck!

deba1682 months ago
sorry..the message was not complete. can i make a plasma globe by placing a incandescent light bulb instead of top load..
Chip Fixes (author)  deba1682 months ago

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

hello chip fix. i am doing this project. but L2=1650 .I need determine L1 and V input

Chip Fixes (author)  mohamedelyamane2 months ago

Oh cool! I would do no less than 18-24 volts for your input voltage. Here's a 48 volt power supply for under $20 that would be suitable:

In terms of L1, I would start with 20 turns and then decrease the turns and monitor the heating of the transistor. Also you are going to need to heatsink the transistor and use a transistor that can handle the higher input voltage. I recommend the ST1510FX.

thanks. and I need determine the value of current bath throw in the circuit .how?

prajkumar2 months ago

May I know which pins?.......if its the transistor's then from the front view i am using the leftmost pin as base...middle one as connector.......rightmost as emitter

Chip Fixes (author)  prajkumar2 months ago
Yes that's correct, and it's what I have labeled in my drawing (Pin 1, 2, and 3). It might look confusing because the middle pin is labeled the base, but it's just how I drew it (the middle pin is actually the first pin).
prajkumar2 months ago

PLEASSSSSE HELLLP......I did everything correctly. According to the circuit diagram.......but my model is still not working......I'm using a tip31c transistor.....47k resistor...and 2 pieces of 1N4007 diodes and I also soldered everything in correctly...but it's still not working.....I'm attempting to light a CFL 5 watt lamp(230 v cuz I'm in India) and also a small bulb....but it's still not lighting up.......the transistor's base collector and emittor are diff from the diagram where the base is not in the middle... But I connected everything accordingly ......pls this Wednesday ........

Chip Fixes (author)  prajkumar2 months ago

The pins should not be different... Try flipping the primary leads. Also, one 9 volt battery may be too little power for such a large coil, try putting two 9v batteries in series. Nice job on winding the coil by the way!

pbaidya prajkumar2 months ago

one thing i can tell you which chip fix have suggested me earlier that make the distance between the top load and the end of the secondary coil short, not more than one inch.


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