This is a functional taser made from nothing more than salvaged parts from a few common household items.
You will need the following items:
-Something with a large capacitor (disposable camera or an old PC power supply)
-A power supply of twelve volts DC or more (any old wall adapter that says "twelve volts" under "output" on the side)
Step 1: Salvage the Parts
You can find a sufficient enough capacitor inside of any old disposable camera, but you can make a much higher quality weapon using a 200 volt capacitor, which can be cut from old PC power supply units. Pick your capacitor and then find a power source. My personal favorite power source to use is any old wall adapter of 12 volts or more.
Step 2: Charge the Capacitor
Strip the insulation off of the ends of the power supply's wires. Plug the power supply in and touch the positive wire of the supply to the positive end of the capacitor, and the negative of the supply to the negative of the capacitor. Wait about sixty seconds for the capacitor to charge and then remove the supply. The negative of the capacitor usually has a small white stripe pointed towards it, and the positive of the supply likely has a white or grey dotted line down the wire's insulation.
Step 3: Shock Stuff!
As soon as the two leads of the capacitor come into contact with anything conductive, the taser will discharge, shocking it. On some kinds of metal it will leave a small scar and could very badly hurt a human or animal.
DO NOT USE THIS DEVICE ON A HUMAN BEING FOR ANY REASON OTHER THAN SELF DEFENSE. I AM NOT RESPONSIBLE FOR ANY NEGATIVE EFFECTS OF YOUR IRRESPONSIBLE DECISIONS.