Introduction: Make a Simple Portable Tesla Coil!

Picture of Make a Simple Portable Tesla Coil!


I've made this Tesla Coil in reference and inspired by José Davēd's video: "DIY Tesla Slayer Exciter Coil Tutorial Mini How to Build Easy Circuit Explanation"

I find that his circuit seems to work really well so I wrote this instructables and also redraw the circuit appropriately since his video did not have a appropriate circuit diagram.

This project is a good starter for people who wants to know about tesla coils. Also a really cool object to place on your work desk!

IT'S REALLY REALLY SIMPLE!! And probably under a tenner!

At the last step you can see some images of it done without a housing!

Step 1: Gather Your Materials

Picture of Gather Your Materials

The list:

  1. 24 SWG Enamelled wire (other sizes may work too)
  2. Standard house appliances wire (those used in wiring your house)
  3. A blank housing cap
  4. Electrical plug housing
  5. LED light
  6. Switch
  7. Transistor BD135
  8. Heatsink for the transistor
  9. Resistor 47k 1/2watt
  10. Breadboard
  11. 9- Volt battery holder
  12. 9- Volt battery
  13. PVC pipe (Mine is approximately 4.3x12cm)

Tools required

  • Soldering Iron
  • Hot glue gun

Step 2: Making the Primary and Secondary Coil

Picture of Making the Primary and Secondary Coil

Secondary coil

Coil some 24SWG enameled wire around a PVC pipe as the secondary coil. I sticked some double sided tape on the PVC pipe before coiling it so the wire will not come off.

Then glue it on to the blank housing cap

Primary Coil

Coil some Standard House Appliance Wire as the primary coil. And hold the shape of the coil with some super glue and hot glue . As two ends of the wire faces downwards drill two holes on the blank housing cap and run the wire down the cap and glue everything in place.

Step 3: Wire the Circuit!

Picture of Wire the Circuit!

It's an extremely simple circuit, just follow the diagram using a breadboard or not as long as it's wired properly it works.

Step 4: Putting Things Together

Picture of Putting Things Together

On the electrical plug housing, cut out the holes for the switch and LED on the sides and hot glue them in place.

Then wire the secondary coil and primary coil accordingly. At this point you should be able to test the Tesla coil by turning it on and putting a fluorescent bulb next to it and it should light up.

If it doesn't work, swap the wires of the primary coil may do the trick.

Step 5: Complete!

Picture of Complete!

Play around with it and show off to your friends!

Here are some extra pictures of the tesla coil which i've tested without the housing


JessK17 (author)2017-03-24

I'm doing this for a college project. It doesn't work. The little picture diagram is different to the circuit diagram in that the base on the circuit diagram is connected to the primary coil and on the picture it's the collector which is connected to just the primary coil. Ive wired it as per the circuit diagram and did it again as per the picture diagram and neither time did it work. The LED won't light up in the circuit. However I've metered out from the negative to the end of the secondary coil and it's 9V so power is obviously getting through. I also tried to wire it exactly how the close up of the board shoes. Everything was exactly how it should be. I've used exactly the same components as you and I've got no lighting of bulbs going on at all. I'm about to fail my module. Please please help!

baburas (author)2016-12-02

Hello CCX191,

I finished the coil following the same source.

I used a BD135 transistor, one Resistor - 47k 1/2w, 9V battery, 6 turns primary coil, 2400 turns secondary.

is no spark, but it successfully lights lamps. There is though a small
problem. When I approach a lamp to the coil, the lamp lights but if I
leave it there
the lighting lasts only for 80-90 seconds and then fades away.

I have to close the circuit for some time and open it again to make it light again.

Have you faced this problem? Can you help me with this?

Thanks for your help

CCX191 (author)baburas2016-12-03

Hey baburas,

There is indeed no sparks as it is a slayer exciter circuit, I never had any issues with my Tesla Coil. Do you have a heatsink on the transistor? that might help..
What about enclosing the circuit or try it on different locations?
If not you can always try making another circuit.
Also do tell me how you set it up, perhaps a picture?

AdityaK66 (author)CCX1912016-12-14

i dont know what i have done wrong it is not working......

baburas made it! (author)CCX1912016-12-07

Hi CCX191,

Thanks for your answer and help.

I just installed a heatsink on the transistor and the lighting lasted, almost 5 minutes. Much better but after that time again started to fade. It is obviously a heating problem. Maybe if Iuse air cooling it works better.

Have you managed to operate for longer periods(etc whole night)?

How long does the battery hold?

agis68 (author)2016-11-29

very good for school projects

SHOE0007 (author)2016-11-28

Do you know how much voltage per cm2 this device could create?

SHOE0007 (author)2016-11-28

Cool project.

About This Instructable




Bio: Ordinary kid with odd interests compared to their peers.
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