Simple SSTC

Introduction: Simple SSTC

This is a simple solid state Tesla coil with one MOSFET

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Step 1: What You Will Need

IRF 540 MOSFET (other similar mosfets will work IRF 510, 630)

Heatsink

50 Ω resistor

1 kΩ pot

1 μF capacitor

Cardboard, glass or bakelite tube

Step 2: Operation

The secondary coil gest warm or hot, use cardboard, bakelite or glass tube. The secondary is made of magnet wire 200 - 400 turns, 0.1 - 0.2mm thickness. The coil dimensions are not critical (30 - 40 mm diameter)

The primary is only 1 turn, 4-5mm bigger in diameter than secondary, 1mm magnet wire, placed at the bottom of the secondary.

Turn the 1k pot when the spark discharge appears on the top of the secondary. At best adjustment the spark is longest and the mosfet gets warm slowly. If it don't oscillate, change the connections of the primary!

Resonant frequency depends on secondary coil dimensions and number of turns. It's between 2 and 10 MHz.

If you operate this tesla coil at higher performance (40-50W) the mosfet gets hot, it requires large heatsink.

Placing a top capacitance to the secondary, the spark gets longer, and the mosfet will be cooler.

The spark produces ozone!

Step 3: Video

3 People Made This Project!

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22 Discussions

0
Tanner_85
Tanner_85

5 weeks ago on Step 1

Actually I've not replicated this instructable, but I'm designing my own MOSFET Slayer Exciter these days, and everybody in the world is using IRFP460 transistors or IGBTs, and they can't be driven by such a simple circuit. I think you should implement a gate driver IC in the end, if you are serious about the performance of your Tesla Coil.

0
BáchT5
BáchT5

3 years ago

so cool, but you should use mosfet z44, the lighting is bigger

0
Francesco Tiboni
Francesco Tiboni

Reply 9 months ago

So if I use irfz44n, what I Need to change

0
radiojamming
radiojamming

Reply 3 years ago

Yes, but I have only this type of mosfet, and unfortunately I have no stronger power supply.

0
Ацетон
Ацетон

Reply 2 years ago

Can i use resistor like 250Ohm and 10W to decreace gate voltage?

0
wetzhy
wetzhy

1 year ago

Could I use a 470 ohm resistor and a 10k ohm potentiometer?

0
wbuchta
wbuchta

2 years ago

You copied keystone science

0
Ацетон
Ацетон

2 years ago

Can i use 40N60FL and split the schematic? Like i make powering of primary with transisor on rectified 220v (with current limiting,with fuse), and use 12-19 v powering to drive the gate?

0
BorisK23
BorisK23

2 years ago

Hey can i use a 2.2uF capacitor instead of 1uF?

0
radiojamming
radiojamming

Reply 2 years ago

Yes, you can.

0
ELECTRONICS3
ELECTRONICS3

3 years ago

irf540 and irfp260 that I used have max gate voltage 20V , when I apply 24V mosfet burns !! how to protect mosfet , can I conect irfp260 in series or use other mosfet !! can zener beetwen G and S protect it from overvoltage!!!!!!

0
radiojamming
radiojamming

Reply 3 years ago

First, the pot between gate and source must be set to minimum resistance, then slowly increase it until small plasma flame appears on terminal. wneh the plasma is the longest, it is the proper adjustment. Don't run the device long time with inproper adjustment, and use a large heatsink. I have no problem with irf540

0
TheGreatResistor
TheGreatResistor

3 years ago

Hey Man

Amazing circuit and output you have but i have a 18v 3a supply will this work?

0
radiojamming
radiojamming

Reply 3 years ago

Try it, if it will not work, build a simple voltage doubler.

0
ELECTRONICS3
ELECTRONICS3

3 years ago

works but I use irfp260 and I burned 2 of them

0
electro techster
electro techster

3 years ago

Nice dude will this work at 12 volts ,i got 4 mosfets rated at 150v 45 A at continuous use,but minimum gate voltage is 10v to turn it on will it work?

0
BáchT5
BáchT5

3 years ago

but if i have a coil look like coil transformer and it's stacked coils, so can I do tesla by it?

0
radiojamming
radiojamming

Reply 3 years ago

I think you have to rewind them this (or similar) way.

0
henningh
henningh

3 years ago

can i use 2 turn primary and 900 turn secondary?

48v ok?

interrupter ok?

0
radiojamming
radiojamming

Reply 3 years ago

I don't know, try it. If it will not oscillate, change the primary (1 turn). If it still not oscillating, decrease the secondary to 400 turns. 48V will ok, but be careful not to draw high current or use a big heatsink! It did not try it with interrupter.