Ever since childhood, almost every american male has been a fan of the Batman. But you can't have the hero without the villians, right? So DC comics created fun characters such as the penguin, catwoman, bane, and of course the joker. The joker was always my favorite (and still is) so i decided to re-create his killer joy buzzer with a more "Friendly" voltage. My 9v buzzer consists of nothing more than spare parts and some cheap stuff from radioshack, so it was a relatively cheap project to make.
soldering iron w/ solder
screw driver (phillips head)
3 batterys with connectors
Note: to make this instructable i had to take apart my buzzer and then put it back together for pics, so i decided to boost the power a little bit from 1 9v to 3 9v batterys.
Step 1: Prepare the Housing
To prepare the housing for the buzzer, drill a 3/8" hole in the center of the top of the box. after that drill another hole that is 1/4" big.
Step 2: Wiring (pt. 1)
the first thing to do in this step is wire all three of the batterys in series (+ to -) and insulate your connections with electrical tape. once you have done that tape our batterys together so the wires dont get in the way.
Step 3: Wiring (pt. 2)
take the positive wire from your batterys and attach that to one of the terminals in your switch. then take a couple of inches of wire and solder one end to the remaining terminal in your switch, and the other to the positive lead in your capacitor. then take the negative wire from your batterys and solder that to the negative lead on your capactor. After that solder one wire in your speaker cable to the negative lead on your capacitor, and the other to your positive lead. remember to insulate all conections with electrical tape or a similar item.
Step 4: Complete the Housing
put your speaker cable through your 1/4" hole and your switch throug the 3/8" hole, and then tighten the nut on your switch. then glue your capacitor to the inside of the project box and place your batterys inside. after this put the plastic lid on top of your project box and then put a belt in between the plastic and metal tops, and tighten your screws.
Step 5: Attach Wires to Old Buzzer
cut a hole in the palm of your glove, and slip your speaker cables through. then put one of your cables through one of the "terminals" on your buzzer and do the same for the other wire. i did not have to worry about my buzzer short circuting because my original buzzer was not a conductor.
Step 6: IT IS FINISHED!
now your buzzer is finished, and you can finally shock your friends while saying "why so serious" and not seem crazy!