Hello guys, this time I will show you how easily you can made your own "stun gun" (aka taser). It can be used for self defense, however it is not its main purpose. This is an educational project to experiment with voltage arcs and even though it wont kill you, it is no joke the shock you will get.

The electrical potencial at the output is arround 7.000Volts. and its arc is enough to scare anyone distracted.

Step 1: Gathering the Required Stuff

- 2 Alcaline batteries (1.5v)

- 3v Step up booster module to 7000volts (Aliexpress)

- Momentary push button [NO]

- Case on any kind to fit the electronics (Famous Altoids tin cans can be used)

+In my case, I used glow in the dark tape for decoration purpouses only.

-Some cables, electrical tape and a bit of heatshrink tube.

As for the tools needed, A drill, scissors and a soldering station is enough for this proyect. The material are pretty easy to find, except for the voltage booster module which I bought from Aliexpress.The whole project shouldn`'t exceed 7€.

Step 2: Energy Source!

We are going to run the two alcaline batteries in series to get the required 3volts for the booster. To do so, simply solder the negative side of one battery to the positve side of the other one(You may sand the batteries to improve the adhesion of the solder). As my case is made from a conductive metal, I wrapped the batteries with tape to ensure they dont short-circuit inside the enclosure.

Step 3: Drilling Some Holes for the Output & Button

Pretty self explainatory step. I drilled two holes for the output cables (far enough so the spark cant jump across) and on the opposite side of the box, inserted the push button (Normally open). Make sure the leads of the button arent touching the enclosure, as it is conductive. To secure it in place, I soldered two cables to the leads of the button and proceded to seal it with some glue (Hot glue can come in handy here). At this point, you may check with a continuity tester (mult.meter) that the button works fine.

Step 4: Conecting the Booster Module & Wiring

This step is pretty easy following the schematic. We are just conecting the module to 3v through the momentary push button. I do really reccommend the use of heatshrink tube to ensure the currents flows through where it is supposed to. As my output cables from the module were too short, I had to fed a longer one through the holes made earlier and solder then to the module.

Note: Usually the red wire is the positive and the white one is the negative (on the booster module). The other two red cables are the output.

Step 5: Getting It All Inside

Here we are going to mount the module and the batteries inside our enclousre (in my case, a tin can). Just work your way until it fits. And remeber, where it fits, it sits. I also used some tape to hold the batteries in place as otherwise they would rattle inside. Once done, close it, and it should be ready. Decorate at your own taste. I used some glow in the dark tape to make it glow in the darkness. You can also spray paint if you want.

Step 6: Finished!

And that's it. Quite easy to build, yet so stunning to see. Remember, this is not a toy. It involves high voltages although it may not kill you, it can produce damage to skin, and kill small life forms. Use at your own risk. This won't replace a TENs unit, if you are looking to control body muscles.