SHOWALL FUN PRANKS HIGH VOLTAGE LAZARUS-64 PHOTOGRAPHY SPY GADGETS VIDEO GAME
Figure 5 - Another screwdriver tip is sacrificed for the cause!
Figure 5 - Another screwdriver tip is sacrificed for the cause!

It is recommended that you discharge the flash capacitor before lifting out the circuit board. I have shorted the fully charged capacitor while the circuit board is exposed so that it can be clearly seen where the high voltage terminals are located and what happens to the tip of a small screwdriver. Ok, I admit, I enjoy making loud, angry sparks and spent a good part of the day charging up the capacitor to fry various conductive objects with it! A single charge could blow several holes in a tinfoil sheet or create two small craters in the surface of a coin. After my ears stopped ringing from the blasts (ear plugs would have been a good idea), it was back to the cause.



Figure 6 - Identifying the important parts of the circuit board
Figure 6 - Identifying the important parts of the circuit board

Once the flash capacitor has been discharged, pull out the circuit board from the camera shell. It will either lift right out, or there will be a few plastic clips that need to be pushed in order to release the board. The camera flash circuit board is amazingly simple considering what it does, and the entire high voltage circuit can be further narrowed down to only four components, if you want to dig in and reverse engineer the circuit. The charging circuit is a simple voltage inverter.

The important parts of the high voltage generator circuit are as follows: Q1 is a high gain NPN power transistor. Some typical part numbers of this transistor are; 2SD965, 2SD1960, 2SD601A, 2SD879, FXT617 or XN4601. T1 is a tiny step up transformer with a primary winding count of 5 or 6 turns and a secondary winding count of 1500 to 1800 turns with a flyback tap at 15 to 20 turns. One possible part number for this transformer would be T-14-013 (Tokyo Coil). R1 is a resistor of some varying value that controls the feedback from the flyback tap on the transformer, creating a high frequency oscillator circuit. This value can be changed to create different frequencies as well. D1 is a power diode that converts the high voltage AC into chopped DC to charge the capacitor. Any diode capable of 400 volts or more will work.

You will probably want to leave the camera flash circuit unmodified with the exception of the removal of the high voltage capacitor. It is easy to just replace the capacitor with your high voltage output wires and then solder to the charge switch in order to use the circuit board for your taser project. If you like to reverse engineer, then you can actually reduce the circuit down to the size of a small marble as will be shown later on. A 400 volt shock from a device the size of a marker top is always a great demonstration of one's hardware hacking skills to an unsuspecting buddy!

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