Introduction: Taser (stun Gun) From a Battery Charger Adapter V2.0

Picture of Taser (stun Gun) From a Battery Charger Adapter V2.0

Hi everybody :)

In this instructable, I'm gonna show you how I made a taser out of a battery charger adapter (little black box, you push into the wall socket :) )

I have already made a shocking device earlier (about 2 years ago), but it was not portable, and looks terrible :D
So in a snowy sunday afternoon, I decided to build a new and better one.

First of all, let's talk about safety.

I'm not a professional enginner, I think almost everyone can make this device in different ways. I tried it, and I'm alive. Due to it is working on a 9V DC battery, current is not high enough to burn the skin, or kill a person.
By the way, high voltage can be dangerous!

Don't shock people with pacemaker, pregnant women, or girls, animals, and so on...

It is on you, how you use it. This taser is made to serve as a self-defense device. I have to say, don't shock anyone with this device, expect when your life is in danger.

I do not take responsibility for any injuries, or death or anything you do with it.

Step 1: Tools

Picture of Tools

You should have these tools to make this project. Some of them are unnecessary, but helps you to make it better, and more stable.

  • Duct tape
  • Hot glue gun
  • Wire cutter / Scissors
  • Wire Stripper

Of course, you can solder the parts into a circuit board, but in my case, if I solder everything into a board, it would't fit into the box. So I can recommend soldering only if you are pretty sure it will fit into your box.

Step 2: Parts

Picture of Parts

You will need the following things. Some of these stuffs should be at your home already.

I searched for the main parts on, and I found these prices.

  • 5-12V Adapter (phone charger, battery chargers and so on, but keep in mind: more volt, bigger shock) ----5$
  • DC Motor (can be found in RC cars, electric toothbrushes...) ---- 5$
  • 6.8 ohm Resistor (to prevent the motor from burning down) (You can use other resistors close to this ohm, I used this one, cause I don't have any other small resistor at home. I tried some other, bigger resistors (around 200-500 ohm, but with these ones, the taser didn't work properly.) If you have a 9V dc motor (which is 5$), you don't need the resistor
  • Switch (push button, slide switch)
  • Copper wires (any kind)

So as a summary, you can make this taser for 10 bucks.
But I'm sure, that you have a motor and/or an adapter laying around somewhere in your house.

Maybe you are wondering, why do we need the motor. Unfortunatelly, I don't know how to integrate a relay into this circuit yet. If you try it out without the motor, you will notice that the sparks are generating after you disconnect the battery. Thats why it shocks once, and then nothing, until you push the swich on and off again. But with the motor, it is like you are swiching on and off rapidly.

Step 3: Take Apart the Adapter

Picture of Take Apart the Adapter

This part is the tricky part. The soul of this project.

Adapters always have a circuit board in secondary side of the transformer. It is usually connected with wires into the adapter, so you just have to cut the wires on both side of the circuit board, and connect the wires from the transformer into your circuit. (Next part)

In other cases, when the transformer connected to the circuit with soldering, like in this picture, you have to melt out the transformer from the board, and solder wires to the transformer.

You should leave the electrodes on the adapter, cause these were made from well conductive, hard material, so it won't break, or bend if you are pushing it into something or someone.

Step 4: Connections

Picture of Connections

As you can see in this picture, this is a pretty easy connection (yes, I made it with Paint :D ).

You have to flip the transformator. The output (was 5-12V) will be the input side, and the input (which was plugged into the wall socket), will be the output (electrodes).

Step 5: Fit Into the Box

Picture of Fit Into the Box

Fortunatelly, I found an old bike light, what used to works with big batteries, so I thought I'll have plenty of space... It barely fit into the housing.

You can fix everything in position with some (many) duct tape.

Pay attention for the motor! DC motors can burn down, if something prevent the rotation. When duct taping things, be sure to leave enough space for the motor.

Step 6: Finish

Picture of Finish

That's it!

When you push the swich, you should hear the motor spinning. It means that your stuff is working. You can test it with any metal object (nails, scissors), wires, or your finger if you dare to touch it :D
You should see some little sparks as both ends almost touching the metal.
At this point, you earned a handshake. Congratulation! You built your first taser. :)

If you have any question, please leave a comment down below, and I'm gonna help you as soon as possible.

Stay tuned for upgrades, and other instructables.
If you are interested in electronics, and DIY things, follow my channel. As i said I'm not a professional engineer, so if I can build something, you can build that too. :)

Have a nice day :)
Leslie Spike


rf (author)2017-03-19

How about replacing the motor with a 555 chip?

ShonaO1 (author)2017-01-20

Alright, I am going to be as nice as I can be on this subject.

This project is all that it is "a project", and unless you are using it to make your friends jump etc, it's a useless one.

I watched a documentary about these, and i'm talking about the powerful ones, NOT ONE SINGLE CRIMINAL IS INTIMIDATED BY THIS, in fact you are more likely to pi55 him off more by bringing one out and you are going to get a hiding or much worse. All you are saying to said criminal is "I am a weakling and i am afraid of you", you are empowering the person who wants to rob you!

If you whip this piece of junk out however, you are in for a major smack down!

For even anyone to suggest this as a self defense device is insulting!

Waste of time and effort!

Sp1k33 (author)ShonaO12017-01-21

Well, you might be right, but unless you tried this out, u can't say its a "piece of junk".
You would be suprised how much power is in there. I barely think that a criminal -we speak of - would like to fight against you, after a hit.

I respect your thoughts, but a documentary is not covering the whole truth. Yes, maybe a suspect won't be shocked that much, but maybe yes. With this u give yourself a chance to protect yourself.
Nothing is less than something. Don't forget that.

YaddyVirus (author)2016-12-27

IT didn't work. I treid using a transformer from a 220V ac to 9v dc adapter but the output voltage is zero. I didn't get a shock nor my multimeter reads any current

Sp1k33 (author)YaddyVirus2017-01-12

U sure u connected it right, and are u sure that the transformer is working?

ShonaO1 (author)Sp1k332017-01-20

If you whipped this out to "defend yourself" where I live, you're gonna have a bad day! Stupid idea!

RiteshYadav (author)2016-05-18

Couldnot understand the circuit. Can anyone plz provide an image of ciruit plz. Also didi u used only the transistor out of the charger circuit or the entire circuit. Plz provide an image. It will be a great helphelp:)

Sp1k33 (author)RiteshYadav2016-05-24


U don't need the circuit at all from the adapter. You just need the transformator from it.
Sadly, I don't have an image of the circuit, cause I took it apart, to build a better one, without DC motor, but with relay.

RiteshYadav (author)Sp1k332016-05-24

Well the transformer has one side 4 pins and other side 2 pins . Now plz explain me what to do. Really in a great problem.

Sp1k33 (author)RiteshYadav2016-05-24

Give me a lil' time. I have a transformer like yours, I'll try it out as soon as i have some time. I'll write u soon. Stay tuned.

RiteshYadav (author)Sp1k332016-05-24

Well the transformer has one side 4 pins and other side 2 pins . Now plz explain me what to do. Really in a great problem.

jerrymonkey123 (author)2016-03-28

how to add a Variable resistor

Sp1k33 (author)jerrymonkey1232016-05-24

A variable resistor should be integrated after the output of the circuit (Primary side in the picture)

Luckyman16 (author)2016-03-11

Can we use capister and diode insted of moter plz plz reply

Sp1k33 (author)Luckyman162016-03-14

I guess you can, but I'll post a new instructable soon, since I have finally worked out how to use relay instead of motor.

van de graaff (author)2015-06-25

No it didnt work ill build it with a relais

Sp1k33 (author)van de graaff2016-01-09

Hey, I finally built it with relay, the instructable (Stun Gun v3.0) will be available soon. :)

Sp1k33 (author)van de graaff2015-11-26

Did u build it?

Sp1k33 (author)van de graaff2015-06-26

Do you know exactly, how to build it with relays, cause I didn't use any relays before. I would be really happy, if u can upload an image of a circuit.

electro bunny (author)2015-11-21

is this transformer a step up or a step down transformer. Also could i get a transformer from a 5v power supply

Sp1k33 (author)electro bunny 2015-11-26

Unfortunatelly I don't really now what kind of transformer I have used... but I got it from a 230V Ac -> 9V DC adapter.
I'm pretty sure that you can use 5V transformer, but you won't get that high voltage, but I guess that would be enough too ;)

tnowroz made it! (author)2015-07-18

Didn't use the motor, but yesh I made it & just shocked myself with it. :D
Thanks for the tutorial brother :)

Sp1k33 (author)tnowroz2015-07-19

hehe nice to see u guys who made it :)
Proud of u :)
I would recommend to try out with the motor, it worth a try i guess... u'll see the difference :)

van de graaff made it! (author)2015-06-22

I build that and used different motors
but it doesn't work. I used 12v motors... plz help my transformer was 230v:16v

Sp1k33 (author)van de graaff2015-06-23

Maybe you should use 9V transformer with a 9V battery. And make sure to use small enough resistor.

van de graaff (author)Sp1k332015-06-23

I will try it out when I'm home thx

Sp1k33 (author)van de graaff2015-06-23

i hope it'll work :)

Amarotica (author)2015-06-04

So I am trying to figure out how to get it to work, it's a great idea and I built it to your specs but the motor runs but there is no sparks until you turn it off... Do you know why?

Sp1k33 (author)Amarotica2015-06-04

well, it seems like the motor is not working properly...
For my first prototype of this, I built it without a motor. When I connected the battery nothing happened, when I disconnected the battery, I could see the spark. But when I attached a motor to the circuit, I got continuous sparks.
Be sure the connect the motor in a right way (not like u connect motors into a usual circuit)

UtkarshJ1 (author)2015-05-23

If i would like to connect it to my cycle when it is parked or my house's gate then how should I connect it??
Plz reply!

Sp1k33 (author)UtkarshJ12015-05-26

Hey, it is a great idea, if u live in a bad place. However it is kinda dangerous. Especially, when someone accidentaly touch your bike who has heart problems, or she is pregnant.

Sp1k33 (author)Sp1k332015-05-26

Btw, I'm planning to make my bike more safe for thieves, if I have an idea in connection with this taser, I'll write it here, and maybe in a new instructable. :) Stay tuned.

Sp1k33 (author)Sp1k332015-05-26

The main problem is, that if you connect the positive end to your bike, somehow, u have to close the circuit. Like the electric fences, the poles are grounded, and thats why it is a closed circuit.
So if you can make a grounded unit around your bike, and wire it back to the stun gun, maybe you can make it.

ShauryaS2 (author)2015-05-18

Please reply

Sp1k33 (author)ShauryaS22015-05-21

hey, sorry for my late.

So, when you get the transformer, you should have 4 cable.
2 in the primary, 2 in the secondary. The 2 from the secondary will be connected to the motor, and to the battery.
The primary (the two you push into the connector) will be your output.

ShauryaS2 (author)Sp1k332015-05-21

thank you so much tlaci18 n thank you very much ...salute

Sp1k33 (author)ShauryaS22015-05-22

I'm glad I can help you :)

ShauryaS2 (author)2015-05-18

Please reply

ShauryaS2 (author)2015-05-18

Please reply

ShauryaS2 (author)2015-05-18


ShauryaS2 (author)2015-05-18


ShauryaS2 (author)2015-05-18

Hey tlac where to connect the transformer

dobydobd (author)2015-04-20

Hey, I followed your steps but now I'm wondering if its actually safe for human use. What is the output's amperage of this stun gun?

Sp1k33 (author)dobydobd2015-04-21

I can't really tell, cause I didn't get any stable measurement, but as I said, I tried it, and due to it is working on a 9V battery, and constains no capacitor it is safe.

Sp1k33 (author)Sp1k332015-05-10


Surendar20 (author)2015-05-05

Got it!! Sry!! Didn't read it fully.....

Sp1k33 (author)Surendar202015-05-10

:) np

Surendar20 (author)2015-05-05

What is the function of the motor??

ibenkos (author)2015-02-13

video of it in action? :)

Sp1k33 (author)ibenkos2015-02-13

Here you are :)

I'm planning to make this stun gun more like a stun gun, with bigger sparks, but I need to learn how to integrate relay, and capacitors into this circuit. Stay tuned :)

About This Instructable




Bio: Hi :) My name is Leslie, and I'm from Hungary. I'm interested in almost every DIY things. I like the repair things, or crafting ... More »
More by Sp1k33:What to Do in 2018EMS, Brain WavesHome / Garage Improvement
Add instructable to: