This site introduces the principle of a commercial electric shock device. It is relatively small in size and can generate a high voltage of over 40,000 volts with a 7.2V power supply, making it very suitable for self-defense. Electronics enthusiasts can refer to this for production.
The circuit schematic is as follows:
T1 and T2 along with peripheral components form an oscillator that generates a DC pulse voltage of about 10Hz. This pulse voltage is amplified by T3 for driving, and finally enters T4 for power amplification. A large current pulse voltage is generated in the primary coil of the step-up transformer B, and after being stepped up by the transformer, a high voltage of over 40,000 volts is produced at the secondary side.
The circuit of this electric shock device is simple and clear. As long as the following requirements are met during production, it is very easy to succeed. T1 is a PNP transistor, requiring B≥150, and can be selected from 9015, 8550, etc.; T2 and T3 are NPN transistors, requiring B≥130, and can be selected from 9014, 9011, etc.; T4 is an NPN high-power transistor, with B≥25 being sufficient, preferably Motorola's MJE13005, whose heat sink is connected to the C terminal. All resistors use 1/8W carbon film resistors. Capacitors should be small-sized. K is a small push-button switch. The step-up transformer can be purchased as a finished high-voltage rod head from an electric baton, or use the flyback transformer from a black-and-white TV. Batteries should be nickel-cadmium or nickel-metal hydride batteries to increase power. To reduce size, it is best to use AAA batteries.
During production, install the components according to the figure below. Pay attention to your own safety during testing. If, after powering on and pressing K, there is high-voltage sparking at the discharge end of the transformer, it indicates success.
