Introduction: Mini Tesla Coil(Slayer Exciter Circuit)

Here is the simplest circuit for generating high voltage.
Here i will show how to make mini tesla coil (salyer exciter circuit).

Step 1: DESCRIPTION

Mini tesla coil(slayer exciter circuit) is a air cored step up transformer which step up the low voltage dc to high voltage ac by creating electromagnetic field around it neon lamps,CFL ,etc gets
lighted up

Step 2: Working of This Circuit

When the base of the transistor gets small amount of current the circuit is closed and electricity is able to flow from emitter to collector which is connected to the primary coil. as due to the presence of 50,000 resistor the electricity is not able to flow and the circuit opens and path of primary coil disconnects hence this cycle occurs several times in one second which result into formation of fluctaing current in primary coil which is steps up more than 50 to 75 times by air cored transformer. finally the oscillations from secondary coil fed back into transistor's base in order to achieve maximum output from this circuit.

Step 3: Things Needed to Build It.

To make this mini tesla coil(slayer exciter) following things are needed:-
1.one breadboard of pcb
2.nonconducting tube (pvc tube)
3. 30AWG enamel wire(one can easily get from transformer)
4. 14 to 15 AWG wire(one can easily get from transformer)
5.some connecting wires
6.aluminum foil paper for top load(if you want to keep)
7.power source(5 to 18v dc)
8.One Transistor(TIP31C)
9.One Resistor (50k)
10.Two diodes (IN4007)
11.one heat sink for transistor if your transistor is getting hot quickly)
12.one small low power led if you want to connect it in circuit( led should be connected in series with the circuit)

Step 4: Making the Secondary Coil

with 30AWG enamel wire wound around 400 to 560 turns(this is not critical measures it can be little less or little more than this turns) on noncounducting tube (pvc tube)but try to avoid gaps between two turns.

Step 5: Making the Primary Coil

wound around 8 turns(this is not critical measures it can some more or some less) on the secondary coil.

Step 6: Making the Circuit

as per the diagram in first picture the circuit have to made on the breadboard(pcb)

Step 7: Making All the Connections

Firstly connect the secondary coil one end (that side's end on which side the primary coil is wounded) to the base of the transistor where resistor and diode are also meeting.

Secondly connect the two terminals of the primary coil to the collector and another to the positive terminal of power source where resistor is also connected( if this circuit do not work in this arrangement then most common error is to interchange the connections of the the primary coil)

Thirdly connect the top load on the non conducting tube where one bare end is present which is not connected anywhere in the circuit(if you wishes to connect topload)

Fourthly connect the power source as positive terminal to the diode's starting and transistor's emitter and negative terminal to the primary coil one end and resistor's end.

If you wishes to connect switch you can add it in series with the circuit.

Your high voltage mini Tesla coil (slayer exciter circuit) is ready now put switch on and enjoy.

WARNING:-

THIS MACHINE CREATES HIGH VOLTAGE AC CURRENT WHICH IS DANGEROUS FOR ELECTRONIC GADGETS AND COMPONENTS SO PLEASE AVOID ANY INSTRUMENT BRINGING NEAR IT WHEN IT IS ON .

AS IT GENERATES HIGH VOLTAGE AC CURRENT PLEASE DO NOT TOUCH IT WHEN IT IS ON IN CASE OF ANY DAMAGE OR ACCIDENT I AM NOT RESPONSIBLE OF IT . THIS MACHINE DO NOT HAVE BRAIN OR COMMON SENSE USE YOUR BRAIN AND COMMON SENSE .

Step 8: Testing It

I hope you enjoyed it.And be safe, do not touch it when it is on.

Comments

author
flying_greekman (author)2017-01-25

I made it and it worked with a 12 v battery .But the coil broke the battery because it used up more than 20 amps at a time .Any ideas about what i did wrong , or what i can do to power it with any other way ?

author

Use 12v 2A smps or any other power supply instead of battery

author
LaserByte (author)2016-08-15

does it matter which way I wind the primary/secondary coils? will the effect change if I have one coil wound clockwise from the ground up and one coil wound counterclockwise? thanks.

author
sohampatel (author)LaserByte2016-12-08

no the coil would work in any direction coil winding as it uses the alternating current as input and output so no problem........you can try......

author
ARule (author)2016-05-14

Can you tell me where to get the enameled copper wire? I can't seem to find it anywhere. Thanks in advance.

author
sohampatel (author)ARule2016-05-14

you can get enameled copper wire from following things:-

1.transformer(any step up or step down)
2.any electric motor rewinding shop
3.any old motor like from cooler motor,mixer motor,solonide,or any other motor except small hobby dc motor

the best way to get enameled copper wire is from transformer.
hope you will get it and soon you will able to make tesla coil.

author
imaseahawksfan (author)2016-04-29

I couldn't get it going so I changed it up. I swapped to a TIP31C and I replaced the diodes to a red led. The led lights up but I don't get any effect on the florecent bulb.

I'm using:

9V power adapter

TIP31C transistor

Red led

Resistor

3/4" schedule 80 pvc nipple (1" od)

32 gauge secondary coil at about 690 turns

I think the primary is 16 ga at 14 turns.

I have traced the circuit to make sure it's correct and I've switched the primary coil. Like I said, the led lights up but i think the frequency is off. I don't have a permanent top load but I still think that the ccfl should light up if it were working.

Image-1.jpg
author

once you should use two IN4007 diodes as shown in the diagram and its better to use 1A{transistor will get little bit hot but it works well] source instead of 350mA.

so once try exactly as shown in instructable circuit and in other case check the primary coil power it it alternating or direct.an if it is alternating then only your coil and of it is alternating then you should check the ratios of the transformer if you increase it beyond its limit then current will be so low and if you decrease the ratio then voltage will be so low to ionized the air and produce wireless effect to cfls.

so please check the current of primary coil and if it is alternating then check the ratios of the transformer.

ok

author
imaseahawksfan (author)2016-04-21

Hi. I like your instructable and I want to make it and use it in a lamp. So far I have bought these parts. Can you tell me if they are correct? I couldn't find 50K resistors, will the 47K or 56K work? Thanks!

IMG_4338.JPG
author

Thanks for your reply.
I have not yet tried with 47K or 56K resistor but you can try it and if the circuit do not work then on option for you is to fit two 100k resistor in parallel to make its value 50K or you shall put two 25K resistor(in series connection) to make ita value 50k

i prefere to use the value 50K resistor because in my circuit it works best you shall try with other values (no problem to try)

when you project gets completed then surely send images.....Ok and if you get stuck any where then pls inform me anytime and for more contact mail at patelsoham9982@gmail.com and my phone number is
+91 9727105099 Ok fell free to ask me anytime.

author
sohampatel (author)sohampatel2016-04-21

I prefere to use TIP31C transistor . you can try with other. if your circuit works with other transistor its good and send images of it.

author
sohampatel (author)sohampatel2016-04-21

i have recently tried with 46k resistor its work.

author
sohampatel (author)sohampatel2016-04-21

56k resistor and 47k resistor both are working .

author

Thanks for all the help. I need to buy some magnet wire, a switch and an acrylic tube. The transistor should be the same according to the mfg cross reference chart. I'll email you if I get stuck. Thanks again!

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