Introduction: How to Make a Miniature Tesla Coil

Tesla coil is a radio frequency oscillator that drives an air-core double-tuned resonant transformer to produce high voltages at low currents.Tesla's original circuits as well as most modern coils use a simple spark gap to excite oscillations in the tuned transformer. More sophisticated designs use transistor or thyristor switches oscillators to drive the resonant transformer.

Miniature Tesla coil also does a same work but it does not produce as much high voltages.

Now I am going to instruct how to make a miniature tesal coil with less number of components.

Lets Get Started..

Step 1: Components Required

Picture of Components Required

22 gauge magnetic Copper wire - 30 cm [Banggood]

28 gauge magnetic Copper wire - 10 m [Banggood]

PVC Pipe [Diameter - 2cm ; Length 9cm]

Switch -1 [Banggood]

2N2222A Transistor - 1 [Banggood]

22K Ohm Resistor - 1 [Banggood]

9V Battery and Clip - 1 [Banggood]

Cardboard Sheet [10 x 10 cm] - 1

Step 2: Circuiting

Picture of Circuiting

1. Take pvc pipe and winde 300-400 turns of 28G copper wire.[Primary coil]

2. Apply tape at bottom and winde 4-5 turns of 22G copper wire [Secondary coil].

3. Now remove enamel of copper wires at end.

4. Solder 22k ohm resistor to the base of 2n2222 transistor.

5. Solder bottom end wire of primary coil to base.

6. Solder one end of secondary coil to collector.

7.Solder Positive terminal of battery clip to Switch and negative terminal to emitter pin.

8. Now solder another end of secondary coil and another pin of switch to the free end of 22k resistor.

9. Leave the top end wire of primary coil free in air.

Circuiting Completed

Circuit and Datasheets attached.

Step 3: Construction and Testing

Feel free to comment.

For more projects subscribe my youtube channel [Click Here]


MOVIEM3 (author)2017-12-01

hi, i need it for science exhibition. and found this project to be intresting. thanyou for the good explanation.hope it works

krnsinhs (author)2017-10-13

It's not working for me tansistor is too heating

Ramanath Pai (author)krnsinhs2017-10-27

try connecting the transistor in the other way
i.e. try connecting the switch to the collector end and try connecting the secondary coil to the transmitter end

Ramanath Pai (author)2017-10-27

It works perfectly for me
Just use a CFL bulb rather than LED or Tungsten bulbs

krnsinhs (author)2017-10-13

mene 2n2222a ki jagah 2222a transisitor use kiya he...

GauravM76 (author)2017-06-02

can't we use the simple copper wire incited of the magnetic wire? as i am not able to find magnetic wire so can u tell me other name of wire which can be used to make this tesla?

please reply.....

Rotnodwipd (author)GauravM762017-10-10

Well sometimes local shop keepers themselves don't know what they are selling try telling them WINDING WIRES. Might work.

Ashar Husain (author)GauravM762017-07-22

you can find enameld / magnet wire on eBay but we sure to buy a lot of meters

BigNateMI (author)GauravM762017-06-06

It's sometimes also called enameled wire. It has an enamel coating, I think to keep from acting as one big plate. You want your electrons running in multiple circles to create the electrical field.

Mohammed Thoufeek (author)2017-08-31

It tansistor is too heat

Mohammed Thoufeek (author)2017-08-31

It's not working for me tansistor is too heating

Mohammed Thoufeek (author)2017-08-28

Sir It not working and so tansistor is too heat

aboudsafar (author)2017-01-07

does the Tesla coil jam on electronic devices? or radio frequency?

Ashar Husain (author)aboudsafar2017-07-22


MadsD3 (author)2017-03-02

Can you use this transistor instead?:

Because i can't get it to work directly by using this transistor. It gets very hot, and we can't turn on any light bulbs with the tesla coil.
Do you know what might be wrong? We set it up like you did in the video

Ashar Husain (author)MadsD32017-07-22

that actually should work better than a 2N2222A cause it gives out more volts :)

Toga_Dan (author)2017-01-08

Youre calling the primary the secondary, and vice versa. Your schematic indicates a 12v battery, but the build uses a 9v.
Other than that, cool project.

rafununu (author)Toga_Dan2017-01-09

It's reversible.

Toga_Dan (author)rafununu2017-01-09

All transformers are, but in this case, applying 9v ac to the 400 turn winding will produce some milliwatt output from the other winding.

Is milliwatt output the purpose of a tesla coil?

JunezRiyaz (author)Toga_Dan2017-01-09

By default it is 12 but I for got to change it to 9V.

Toga_Dan (author)JunezRiyaz2017-01-09

probably close enough.

The "primary" and "secondary" labels i would switch. Primary is incoming V. (9V in this case) The secondary, in this case will be the approximately1000V output.

Gagan2005 (author)2017-01-07

Nice Idea

JunezRiyaz (author)Gagan20052017-01-07

Thank you.

songspkco (author)2017-01-07

Nice one... i will definitely try this

JunezRiyaz (author)songspkco2017-01-07

Thank you.

About This Instructable




Bio: HI! I am Junez Riyaz, currently doing Bachelor of Technology in the field of Electronics and Communication Engineering. I am much interested in inventing something ... More »
More by JunezRiyaz:How to Make a Home Theater With Reclaimed SpeakersHow to connect I2C Lcd Display to Arduino UnoHow to Make Simple Flyback Driver
Add instructable to: