Typical electronic rodent killer circuit diagram

It is said that rats are more sensitive to electromagnetic fields, which is why general high-voltage power grids are less effective in killing rats. The electronic rodent killer introduced here usually does not have high voltage on the power grid, so it will not arouse the alertness of rats. However, as soon as the rat body triggers the power grid, the power grid will immediately apply high voltage and kill it instantly. It has a good rat killing effect.

working principle

The circuit is shown in the figure. B is an isolation and step-up transformer. Since the power grid uses the earth as an electrode, in order to prevent the mains security device from malfunctioning when killing rats, a transformer is used to isolate the circuit from the mains. The secondary low voltage of about 6V is rectified by VD1 and filtered by C1 to obtain a DC voltage of about 7V for control purposes. The pulsating voltage obtained after the high-voltage alternating current is rectified by VD2 is used as the touch-kill power supply. The one-way silicon controlled thyristor SCR is used for on/off control of high voltage, and the SCR cathode is connected to the power grid through the LAMP. In the static state, the transistor V1 is cut off due to the suspension of the base circuit, and the SCR is also cut off. There is only a very low DC voltage between the power grid and the ground, so the electric field generated is very weak and will not alert the mice. When a mouse touches the power grid, V1 is turned on immediately, triggering the SCR, and pulsating high voltage is immediately added to the power grid through the LAMP, killing the mouse. At the same time, V2 is also saturated and conductive, relay J is energized and closed, and the bell DL is powered on and rings to notify personnel to remove the dead rat in time.

Component selection and production

The list of components is as follows: No. Name Model Quantity R1 Resistor 100K 1 R2* Resistor 200Ω Needs adjustment 1 R3 Resistor 5.1K 1 C1 Electrolytic capacitor 220u 1 C2 Electrolytic capacitor 47u 1 VD1, 3, 4, 6 Rectifier diode IN4007 4 VD2 Rectifier diode IN5408 1 VD5 switching diode IN4148 1 V1 transistor 9012 1 V2 transistor 9013 1 SCR unidirectional thyristor BT169 1 J Relay 6V small 1 BX fuse 0.5A Φ0.5cm×2cm 1 B Transformer modification, 1 LAMP incandescent lamp 60W/220V 1 B selects a control transformer of about 300W for modification, removes the low-voltage winding, and winds about 1200 turns of Φ0.25mm enameled wire, and taps the low-voltage winding at 13 turns. J uses a 6V small relay. During production, all components are mounted on a circuit board. The power grid can be formed by winding several wires around a porcelain insulating support 2cm above the ground, and the common end of the circuit is driven into the ground with iron nails. To enhance the effect, splash some water on the ground.