Then take it a step further as you hack this project to electrify a defense grid (think small area such as a room or so) or use it as a defense mechanism to repel unwanted individuals from your stuff! My favorite use is as a shield on my robots where, when someone tries to pick it up will be in for quite a shock!... literally
First just read through the project, make sure to gather all the needed parts and tools and then you'll be able to create your very own defense taser.
Step 1: Materials/Supplies
1. Default materials: soldering iron (covered here)
2. circuit board scraped from a throw-away temporary camera
3. 3x2x1" project enclosure
4. Red SPST (single pole single throw) Pushbutton Switch
5. SPST Submini Slide Switch
6. 6" of stranded 22-24 gauge stranded wire (preferable 24 because its thinner)
7. Some AA batteries, 2 screws w/bolts, and a drill.
All these things are available at your local radio shack. Happy Huntings!
Step 2: Circuit Disassembly
We begin by first removing the capacitor. The reason for this is because the capacitor stores charge that when triggered will flow (hopefully not through you) to the high voltage flash tube. But for our hack we don't need either the capacitor or flash tube so we can scrap these parts for later uses.
Now use either a screwdriver or some other useless tool (that you don't need or really care for), making sure that it has a non-metal handle (otherwise you will get shocked!!) and arc it across the leads of the capacitor to discharge any current that may still be contained (this means to connect both ends of the capacitor using the tool as a connector).
Beware because it it is fully charged then it will create a loud pop along with a pretty sick blue flash right before it burns two indents into your tool of choice. Using a metal handle to arc the capacitor WILL result in you getting a strong shock that proceeds up your entire arm! (trust me I've done this). So go ahead and snip off the leads of the capacitor closest to the circuit board and cut off the three wires that connect to the flash bulb.
Step 3: Box + Rewiring
Just pop it off so that you see the circuit board connections. Now wire the push button switch with one of the wires connected to the center connection and the second one to one of the remaining three smaller connections that are on the circuit board. Connect these two wires to the push button and you know have push on demand taser action!
But first, find a drill bit that will cut a hole large enough for you to push the screws through the front and space them equally from each other. Once you have drilled the holes strip two pieces of wire about 1.5" then loop it around the screw and twist it so that it is firmly wound around the end of the screw. Or you can use some crimps for an easier install. Push the two screws through their respective holes and use the bolts to tighter the screws outside of the casing so that they do not move around. Now you can solder those two wires to where the capacitor was.
Step 4: Connect and Taser Away
After wiring up the circuit to a AA battery, then we recommend using your multimeter (if your an electronic hobbyist or roboticist then shame on you if you don't have one! lol) to measure the voltage of your new taser once you press the switch. Now all that's left is to test it out...on yourself. The rule of thumb for using your taser is that you should be able to handle taking that shock 3 times before using it on anyone else. But we warn you, after a single shock from this high-voltage gadget, you wont like the idea of a second. Enjoy!
For more info, or if you're unclear/having trouble with a step just go to Ocalon Electronics. There's also many other electronics projects, gadgets and stuff that you might be interested in.