People, I strongly urge you to only attempt this if you know what you are doing. There are high voltages involved in this (200-1000 Volts) And you can get shocked. I strongly advise the utmost caution while attempting this. While the shock will not really harm you, it is extremely painful. BE CAREFUL.
First, The Materials.
A Disposable Camera (2-5 Dollars)
An Older 3.5 mm Stereo Jack (Free - 1 Dollar, Electronic Goldmine - 6 Ft. Cable )
A SCR (Silicon Controlled Rectifier, Like A Transistor) (Digi-Key,Digi-Key #EC103D-ND, 39 Cents)
Electret microphone (Just a normal microphone, WITH A STEREO 3.5 MM JACK) (Free)
A Camera Capable of Prolonged Exposures or a bulb "B" Exposure Setting (AKA A newer SLR camera)
A Multimeter with a high-voltage DC option.
The Steps
Take apart the disposable camera (CAREFULLY) So that the only parts remaining are the circuit board and the battery. Remove the battery. Short the capacitor. ( The capacitor is the cylindrical thing. It has two leads. Put a piece of wire or metal pliers across the two leads to short it. It might make a loud sound. And smoke. This is normal. )You need to solder wires to two places. These wires trip the flash. Sometimes the places you need to solder this are obscure in location, but are sometimes obvious. I recommend going to your local CVS and grabbing one of their CVS brand cameras (AKA the …
