Mini table SGTC spark gap tesla coil DIY

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Mini table SGTC spark gap tesla coil DIY


Help email:



In the DIY process, if you have any questions that you don’t understand, please send an email to our email address(, the title says SGTC, we will reply you in the first time after seeing it.

This is a mini spark gap tesla coil(SGTC),it is small but full funtion.The most important thing is that it can touch and don’t worry about the electric shock injury.The original intention that we design this decive,plz reference The following article

Diy table spark gap tesla coil -SGTC-type3

OK,let us start making it



Scattered parts

Foam is buffered at the bottom


The transformer coil needs to be installed according to the picture, and the rough copper wire is the primary position.

Please look at the annotation on the picture


High voltage diode


Power indicator lamp,led long foot is +


Power socket and switch


High voltage signal generator(in the back there is label “+”,”-” and “”out“”)

red wire is + yellow wire is –

soldering to the right place marked in picture below,on the board you can see “+” and “-”

ok,the board finished




now need connect the Primary coil and secondary coil to this board

first glue the bottom shell


The primary coil winds three turns(Although the bottom is reserved for 4 turns, but please winds only 3 turns,and must Clockwise)



Now solder the “IN” “Out” “L2”

The soldering place  is best to do insulation treatment,
Prevent discharge(Cover exposed wires with tape)



Ok,finished all the soldering.


Soldering the discharger

two wires(The end of the  wire needs to be tied to the metal doll,Use the tip of the doll as a discharge gap )

Glue 2 metal dolls to the plastic slider
Adjust the distance of the slider so that the distance between the two swords is adjusted between 0.1-1mm(The spacing cannot be too large, otherwise it will not work)
This is the discharge gap





About the power suply:

you can use any DC12v power suply(make sure the out put current is 1A-2A)

For example:



if you don’t want to use the plug,you can solder two wire directly to the board,and connect them to your DC12v power



ok,all is done,12v dc power,you can use it now(plz use it in dark place,you can see the spark and arc)





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