Do-it-yourself police shocker flashlight repair

An electroshock device (stun gun), abbreviated as ESHU, is a publicly available special means of protection against offenders and an effective means of deterring and protecting animals, such as dogs, when attacked.

Shockers on the market are presented in a wide range, but the principle of operation of all models is the same. They differ from each other only in the voltage on the electrodes, arc power, reliability and the availability of additional services, such as a flashlight and built-in charger, and others.

The main consumer parameters of any shocker are the open circuit voltage on the spark gap electrodes and the arc power. According to GOST R 50940-96 “Electroshock devices. General specifications. " Shockers by voltage on the electrodes are divided into five groups. The first is from 70 to 90 kV, the second is from 45 to 70 kV, the third is from 20 to 45 kV, the fourth is from 12 to 20 kV and the fifth is up to 12 kV inclusive. And according to the power of the arc impact - into three types. The first is from 2 to 3 watts, the second is from 1 to 2 watts and the third is from 0.3 to 1 watts.

Depending on the combination of the type and group possessed by a particular model of the stun gun, according to GOST R 50940-96, it can be attributed to one of five classes. To which class the stun gun corresponds, it is easy to find out from the table below. For example, a stun gun of the second type of the third group belongs to the third class.

First class stun guns are very powerful and expensive, they are weapons for special forces. For personal protection, a second or third class shocker is quite suitable. Shockers of the fourth and fifth classes are more suitable for intimidating the attacker than for real protection.

Video (click to play).

Attention, if you decide to buy a stun gun, then consider the following. For a temporary paralysis of the physical strength of an attacker, the time of continuous impact of a shock discharge on his body should be about 3 seconds. With a shorter exposure time, you will only anger the offender and then it is quite possible that you yourself will fall under the influence of your own shocker. It is permissible to use a shocker only if you are sure that you can keep the shocker pressed by the electrodes to the enemy's body for three seconds.

I had to repair a JSJ-704 type stun gun with a flashlight. The appearance of this shocker is shown in the photo above. By external signs, the shocker was serviceable, the LED indicating the battery charge was on when the shocker was connected to the network. The flashlight worked, the ready-to-discharge LED was also on, but when the discharge button was pressed, nothing happened. It became obvious that the fault lies in the high-voltage converter circuit.

All stun guns, regardless of model and manufacturer, work on the same principle. Voltage from a battery or batteries is fed to a high frequency generator, which converts DC voltage into AC voltage. An alternating voltage is applied to a step-up high-voltage transformer, the secondary winding of which is connected directly or through a voltage multiplier to the external electrodes of the shocker. When the stun gun is turned on, a powerful electric arc arises between the electrodes.

The photo shows the electrical schematic diagram of the JSJ-704 stun gun.