## How to make Tesla Coil

How to make Tesla Coil. Simple solid state Tesla coil also called slayer exciter circuit (A Slayer Exciter is an air-cored transformer that steps up a very low DC voltage to a very high AC voltage) Its is a simplest Tesla Coil and class 8th to above students can build under parents or teacher supervision.

What is Tesla Coil? A Tesla coil is an electrical resonant transformer circuit invented by Nikola Tesla around 1891. It is used to produce high-voltage with low-current and high frequency of alternating-current electricity. Tesla experimented with a number of different configurations consisting of two, or sometimes three, coupled resonant electric circuits. Read more.

What is Tesla Coil? A Slayer Exciter is an air-cored transformer that steps up a very low DC voltage to a very high AC voltage

In this post we only tell you list and diagram, construction of this project can be learn via video tutorial

### Material

1. Transistor 2n2222
2. LED
3. copper wire 26 to 30 gauge
4. PVC pipe
5. connecting wires
7. 9V battery

### Watch How to make Simple Tesla Coil from PSC YouTube channel

(Note: Please click on closed captions for English subtitle)

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Warning: The Slayer exciter creates an electromagnetic field that may negatively affect electronic equipment

### Updated Video:

(Note: Please click on closed captions for English subtitle)

### Habab

• #### Gianmarco Peña

(April 3, 2015 - 5:18 pm)

nice… what’s the diameter of the tube?????

• #### Gianmarco Peña

(April 4, 2015 - 7:44 pm)

i`m sorry men, i forgot…. what does “copper wire 26 to 30 guag” mean??? it`s the gauge of the wire? how long is the tube or how many spins are in the coil?? i don`t speak english, jejejeje….. THANK’S

• #### Abdul Rauf

(April 14, 2015 - 3:17 pm)

yes it’s gauge
you have to make 3 to 4 hundreds turns around the tube.

• #### نعمان نعیم نعیم

(May 9, 2015 - 11:00 am)

dear there is been done a mistake by you habab the negative of the led is connected to emmiter but you say the positive is connected to emmiter revise the video and see, thanx

• #### xmen

(April 19, 2015 - 7:34 pm)

I use 28 AWG wire and set up a same circuit as u mention but it’s not working not a single small LED is glow,can you help me why it is happen

• #### HABAB

(April 26, 2015 - 8:10 am)

Have you tried turning the coil ring upside down?

• #### نعمان نعیم نعیم

(May 9, 2015 - 10:59 am)

dear there is done a mistake by you habab the negative of the led is connected to emmiter but you say the positive is connected to emmiter revise the video and see, thanx

• #### Abdul Rauf

(August 20, 2015 - 8:52 am)

Please check you transistor and connections.

• #### Aarsh Patel

(August 20, 2015 - 8:29 am)

please can u tell me which type of bulb u used in the video to test the tesla coil (designed like CFL) ???
How much watt or volt it requires????

• #### Aarsh Patel

(August 20, 2015 - 8:33 am)

pleas tell me as soon as possible….

• #### Anudeep chinna

(September 10, 2015 - 1:37 pm)

please send ppt of simple tesla coil

• #### Abid

(September 27, 2015 - 9:23 am)

• #### Yohanes Kristanto

(October 11, 2015 - 2:50 am)

hey, thank you so much for sharing your info.. I have a question tho, can I use thicker wire? 24 or 25 gauge? thank you brother!

• #### Ýõgéñdrã Sólãñkí

(November 4, 2015 - 12:58 pm)

Hey bro. Which bulb have u used in this project bcoz I m using CFL of 5 watt then it is not working and also the LED is blinking in inverted coil so pls suggest me
My email- yogendraslnk786@gmail. Com

(December 20, 2015 - 5:57 am)

Sir, I have also made a tesla coil but it is not working, could you have a look and check what’s wrong in it please please please ? led is glowing but bulb is not lightning ?? I have attached pictures so that you could have a look

(December 20, 2015 - 6:14 am)

Sir, I have also made a tesla coil but it is not working, could you have a look and check what’s wrong in it please please please ? led is glowing but bulb is not lightning ?? I have attached pictures so that you could have a look

• #### Abdul Rauf

(December 22, 2015 - 5:42 am)

• #### M Soahib

(January 1, 2016 - 9:45 am)

Assalam O Alikum Sir Ap ny ni batyia kay energysaver katnay watts ka hona Chaiay apnu kise bhe Video may Or is kay Back my jo 4 wire hote hy us kya karna hy Plzz Repnay karay ga
Sohaibsobi81@gmail.com

• #### Abdul Rauf

(January 3, 2016 - 4:57 pm)

Koi sa bi energy saver use kia ja sakta hai. energy saver ki kisi be wire ko is projects se connect nahi karna

• #### M Soahib

(January 4, 2016 - 7:47 am)

Sir may Chahta ho kay 12W ka Saver Full on hona Chaiay To us kay liay mujay Kuch Cheizo ka izafa karna para ga ya ni Q kay is say to saver Dim Jal raha hy

(January 3, 2016 - 3:07 pm)

Sir,
Thanks for your valuable reply, I will definitely try out the simple version of that project. And sir did you saw the attached pictures of the project I made cause I wanted to know there I went wrong. Just a humble request to you that please check my model and tell any suitable solution to the problem.

Regards

• #### Frank Wilbert

(March 10, 2016 - 2:40 am)

Hi one question, instead of magnet wire for the primary coil can it just be 22AWG hook up wire? I have magnet wire but other videos are saying to use hook up as the primary and magnet as the secondary.

• #### Juan Higuera

(April 12, 2016 - 3:35 am)

were u able to make the coil work ??

(March 17, 2016 - 3:02 pm)

Sir, I again tried it, the simpler version and it is not working ??AGAIN ??
Please have a look at the attached pictures.

• #### Havi Nguyen

(January 18, 2016 - 10:57 pm)

Please can someone tell me what I did wrong or how I can fix this? Please!!!! I’m doing this for a project so please reply as soon as possible!!!

• #### Havi Nguyen

(January 18, 2016 - 11:06 pm)

Here are the pictures of my project. How can I fix this and make it work? Please as soon as possible!!!

• #### james

(January 21, 2016 - 2:18 pm)

when the led is on, what does that mean???

• #### P'itam Chettri

(February 16, 2016 - 10:34 pm)

capacitor for primary coil is not used why???

• #### mohd. zaki

(March 26, 2016 - 7:50 pm)

what is the dimensions of PVC pipe??

• #### mohd. zaki

(March 26, 2016 - 7:51 pm)

what are the dimensions of PVC pipe??

• #### Abhishek Angale

(March 27, 2016 - 7:27 am)

Can I use a kn2222a transistor?

• #### colin hough

(March 30, 2016 - 3:59 am)

why do you not have a capaciter or is that only for spark gaps

• #### colin hough

(March 30, 2016 - 4:00 am)

and do you need a light

• #### গোধুলির আকাশ

(March 31, 2016 - 3:41 am)

what kind of wire can i use on primary & secendry ……
&
how many turn on primary & secendry ?
can i use 9 volts battery (not full charge )

• #### Do-Science

(April 4, 2016 - 8:29 am)

Magnetuc copper wire guage 30 and more than 300 turns requires for primary and 3 to 4 for secondary

• #### Kamruzzman ovi

(April 4, 2016 - 2:59 am)

my circuit is working but led id lighting and energy is not working . what can i do now ?

• #### Yasir Ali

(April 25, 2016 - 7:15 pm)

sir please can you tell the theory of operation of this project. i need the detail for my lab project.

• #### Aqib Hussain

(April 26, 2016 - 8:58 am)

Salam. I have made this circuit. But it doesn’t work. I have tried both methods(with and without breadboard). The transistor gets very hot. But the led won’t light up neither will the coil work. Please help me sir. It’s urgent.

• #### Aqib Hussain

(April 26, 2016 - 9:00 am)

• #### Aqib Hussain

(April 27, 2016 - 6:21 am)

Salam. Update: I can get the led to light up but the bulb doesn’t light up when I take it near the coil. I have almost 300 turns on the larger coil and 3 turns on the smaller one.

• #### Do-Science

(April 27, 2016 - 6:41 am)

try to invert 2nd coil then check it

• #### Aqib Hussain

(April 28, 2016 - 8:58 am)

I’ve done that still doesnt work. I used a 26 guage copper wire for both coils. The larger coil has atleast 300 turns(maybe a little more). For the smaller coil I’ve tried with 2 or 3 turns one at a time. The pipe I used is of half inch diameter. Looks thinner than the one you used though. I ‘ll be waiting for your kind and helpful reply sir.

• #### Do-Science

(May 3, 2016 - 5:21 am)

please try an other transistor some time it doesn’t work

• #### Stefan Skowronek

(May 2, 2016 - 11:41 am)

Dear Sir,
I have build this circuit, and it doesn’t work. In the photo you can see the general setup and the connection scheme. The secondary coil is 0.3mm (about 28 AWG) with about 280 turns. I tried with 2, 3, 5 and 6 turns for the primary coil, also reversing the connection in each case. Non of it worked. What could possibly be going wrong?

• #### Do-Science

(May 3, 2016 - 5:16 am)

I see you primary coil’s 2nd terminal connected with other wire. it must be free and short in length

• #### Stefan Skowronek

(May 4, 2016 - 2:25 pm)

Thank you for your reply! The diode is actually a “normal” diode (1N4148) which I used instead of the LED. I replaced the diode by a LED. I also replaced the coil because the original one was on a massive wood cylinder, and I thought that maybe it should be a tube. The new one is a bit larger in diameter, on a plastic tube, with about 285 turns. The primary coil has now 4 turns. I shortened the 2nd terminal of the large coil. The primary coil is now clockwise, with the lower (the 1st) terminal
connected to the collector of the transistor. The secondary coil is
counterclockwise, with the 1st terminal connected to the base of the
transistor.
It works now, but only for a short time (a few seconds to half a minute), than the transistor burns. I do not know if its because of excessive voltage, excessive current, or whatsoever.
What could I do to keep the transistor from dying (apart from using one with higher voltage/current/power ratings)? Is it possible to use a darlington transistor?

• #### Do-Science

(May 5, 2016 - 4:15 am)

now you have to increase resistor Value or try to add additional transistor in parallel.

• #### Stefan Skowronek

(May 5, 2016 - 6:46 pm)

Hello,
I did both, increment the resistor value to 160k, and put a second transistor in parallel. The transistors still get very hot, but for now it is working all right. Thank you very much, I really appreciate your help! It is a great project! I was actually surprised how bright the lamp is glowing.

• #### Do-Science

(May 3, 2016 - 5:18 am)

and i also observed you uses zener diode. try again without it

• #### paras

(June 29, 2016 - 5:14 pm)

Plz make a video telling what to do or what not to do in making tesla coil as all are getting troubled this request is from all the frnz waching your you tube channel plz
Do it definately
Plzplz plz plzplzplz plz plz plz plzplzplzplz plz plz

• #### KARUN R.PILLAI

(August 16, 2016 - 5:16 pm)

Dear Sir,
I have build a Tesla coil with 26 gauge copper wire,but when I connected to 9v battery the transistor become very hot and tesla coil is not working.I tried this project 7 times but it didn’t work and transistor become hot what was the mistake done by me please help me sir

• #### Ronit

(September 18, 2016 - 2:30 pm)

Used 30 gz with 300 turns, dia-0.50 inch, resistance 22k and transistor pn2222..bt its not working only the circuit led blinks when I touch the coil..i inverted the coil,battery bt no use…need help…

• #### Ronit

(September 18, 2016 - 2:41 pm)

This is my circuit

• #### zahid

(October 4, 2016 - 9:39 am)

what is the least amount of the turns of the pirmary coil

(October 6, 2016 - 12:35 pm)

around 300 turns for primary and 3 for secondary coil

• #### Do-Science

(October 6, 2016 - 12:48 pm)

300 turns and 3 turns for 2nd coil

• #### zahid

(October 8, 2016 - 10:00 am)

used 30 gauz wire 350 turns wire for the primary coil and 3 turns for the secondary .
it works but the brightness of the cfl bulbs and rods is not bright enough as showed on the video also the transistor is getting extremely hot. also cant take the cfl bulbs even 1 inch away from the coil also used a top load but nothing happened. Sir please give a solution

• #### zahid

(October 6, 2016 - 7:06 am)

• #### zahid

(October 8, 2016 - 9:55 am)

used 30 gauz wire 350 turns wire for the primary coil and 3 turns for the secondary .
it works but the brightness of the cfl bulbs and rods is not bright enough as showed on the video also the transistor is getting extremely hot. Sir please give a solution

• #### Kenju Magtibay

(October 15, 2016 - 3:10 pm)

what if I use 1400 primary, will it work?

• #### Victoria Mikael

(November 12, 2016 - 4:57 pm)

Assalamualaikum sir. i have build a tesla coil with 24 gauge copper wire and my transistor become hot and not working. for 1st coil, i make less than 200 turn and 2nd coil is 3 turn. can u help me my brother? sorry about my english. i need to submit this project on thursday :'(

• #### Do-Science

(November 17, 2016 - 4:24 pm)

you project seems good can you tell me type of transistor you used? like pnp or npn?

• #### Farah Deebah

(November 20, 2016 - 4:27 pm)

Aoa, Hi sir I made this project all properly used 2N2222A transistor, 29 k resistor, 27 gauge copper wire and pvc pipe and also insulated wire also but it’s not making any out put. For power I used 9v battery and connector and 11w energy saver. Please help me as I need it as my science fair projects till 22 November 2016. Kindly help..

• #### Farah Deebah

(November 21, 2016 - 7:25 am)

Can anyone help me about this project as I messaged yesterday also but I didn’t got any reply that what gauge of copper wire I should use for secondary coil.

• #### Rauf Əsədov

(December 28, 2016 - 12:42 pm)

Salam Aleykum, Could you explain me where I made a mistake. It does not work. I used transistor TIP41c , 22K resistor, on-off-switch, 26 awg(0.4mm) for secondary coil, 18 awg(1mm) for primary coil, approximately 200 turns for secondary coil and 2 turns for primary coil. Also I checked other transistors and resistors, they did not work either. What is wrong with this circuit? please help me. I think the problem is related to 18 awg (1mm) cable.

• #### Mr. ClashBash

(January 6, 2017 - 9:25 pm)

Hey, i’ve made a same tesla coil with all the requirements you have talked about but the problem is, when the battery is connected the LED glows up and the salyer doesn’t works the transistor heats a bit of too. I tried inverting the primary coil but the LED glows continuously independent of everything. Please help me, as it is mine physics project i need to work it out asap…. https://uploads.disquscdn.com/images/9b295e1d0f48d7df6bdda86fec076eb38a599738a4fc5a83ac52cf1d0f2eac63.jpg

• #### Do-Science

(January 7, 2017 - 2:42 am)

can you confirm me about your copper wire is it enamel coated copper wire ? in picture 2nd coil doesn’t look

• #### Scope Of Unity

(January 24, 2017 - 12:45 pm)

hey.I made a tesla coil that you have talked about.My Led is glowing and When i touch the coil it turns off.But when i took my energy light closer to Coil,it doesnt glowing.I inverted the primary coil,but led doesnt glowing means my past circuit is perfect.So what should i do know?I need to fixz it before 28th January.Pls Help.

• #### Arwankid Dkhar sympli

(March 22, 2017 - 4:23 pm)

Hello i need help with this project i have try many time but it’s don’t work….

• #### swvy

(April 7, 2017 - 10:13 pm)

hi sir i have tried making this using a 2n2222A transistor, 22k resistor . my primary coil stands 24cm tall, and around it there are are 4 loops of the secondary coil. the problem is that my transister keeps getting hot and blows up . can you please help me as this is very confusing me and i am in a hurry to finish this for my project.
thanks

• #### Do-Science

(August 4, 2017 - 6:08 am)

can you share your project photos it will help us to identify the problem

• #### swvy

(April 8, 2017 - 9:26 pm)

does the lenghth of the primary and scondary coil matter

• #### Faizan Hamayun

(August 3, 2017 - 11:17 am)

How many tesla generated?

• #### Milind

(January 10, 2018 - 3:35 pm)

Hi bro please tell me the led that you used when I connect negative terminal of led to emitter it stops glowing and circuit also not working help

• #### --unknownymous --

(January 24, 2018 - 11:59 pm)

pls help me. I tried doing the same thing the battery heats up and yet theres no flow of electricity within the board. Pls help me. Its for my science project

• #### DamascusButterKnife

(January 29, 2018 - 9:37 pm)

Correct me if I am wrong, but the pictorial diagram is not correct. It appears that the LED is not wired in properly. It shows the Anode connected to the Base when it should be on the Emitter, and the Cathode is connected to the Emitter when it should be on Base. https://uploads.disquscdn.com/images/68712bf1d28c81d5a361a638433b927a93ed5b888ca3a39ac051bc016c4029a2.jpg

• #### Marisol Caballero

(February 2, 2018 - 12:55 am)

My Tesla coil does not wont to turn on. But I am doing a different model of a Tesla coil it is for my science fair project please can you help me.

• #### Marisol Caballero

(February 2, 2018 - 1:19 am)

• #### Marisol Caballero

(February 2, 2018 - 1:58 am)
• #### Marisol Caballero

(February 2, 2018 - 2:18 am)

: o

• #### Do-Science

(February 2, 2018 - 3:14 am)

1st try to invert 2nd coil connection and can you tell what is size and turns of primary coil?

• #### Marisol Caballero

(February 2, 2018 - 3:26 am)

The primary coil is 56 cm and have to loops around the copper tube.

• #### Abdul Rauf

(February 2, 2018 - 4:43 am)

your primary coil gauge seems thick it should be 30 gauge and turns should be more then 200

• #### Marisol Caballero

(February 3, 2018 - 5:17 pm)

the primary coil is 56 cm (red wire 300v – 20 ga) and have two loops around the cooper. the second coil is cooper 24 awg.

• #### Marisol Caballero

(February 3, 2018 - 5:23 pm)

we need change the first coil ?
what about intersection of first coil to the transistor circuit?

• #### Marisol Caballero

(February 2, 2018 - 3:31 am)

The tube is 2.5 of diameter and 10 centimeters tall the tube and and only put 7.5 tall of copper.

• #### Marisol Caballero

(February 2, 2018 - 3:39 am)

I replied already what do I do now.

• #### Marisol Caballero

(February 2, 2018 - 3:48 am)

I tried to invert the 2nd coil connection but did not work.

• #### Do-Science

(December 3, 2018 - 8:59 pm)

Where are photos?

• #### Abdul Rauf

(February 2, 2018 - 4:50 am)

yes

• #### Munir Balti

(December 3, 2018 - 7:40 am)

i use 30 guage wire with 700 secondary turn but its not working what can i do for that