Infrared detection type electronic rodent killer circuit

This circuit is directly connected to the city, so you must pay attention to your own and others' personal safety.

The electronic rodent killer introduced in this article uses an infrared light reflection control circuit. When a mouse enters its effective detection range, it can automatically connect the working power of the high-voltage circuit, generate high voltage and kill the mouse. The electronic rodent killer circuit consists of a power supply circuit, an infrared control circuit and a high-voltage circuit, as shown in the figure.

Infrared detection type electronic rodent killer circuit schematic diagram

In the circuit, the power circuit is composed of power transformer T, rectifier bridge UR, filter capacitors C4, C5 and three-terminal voltage regulator integrated circuit IC2; the infrared control circuit is composed of infrared light-emitting diode vLI, infrared photosensitive diode VLS, transistor V, resistors R1-R6, capacitors C1-C3, integrated circuit IC1, light-emitting diode VL2 and solid-state relay KN; the high voltage is composed of solid-state relay KN, resistor R7, capacitors C6, C7, diodes VD1, VD2 and high-voltage electrodes. After the AC 220V voltage is stepped down by T, rectified by UR, filtered by C5 and stabilized by IC2, it provides +6V working voltage for the infrared control circuit. The oscillation signal output by pin 5 of IC1 is amplified by V and drives VL1 to emit modulated infrared light. Usually (when no mouse enters the infrared detection area), V LS cannot receive the infrared light emitted by VLl, IC1 is in automatic oscillation state, its pin 8 outputs high level, VLZ is not lit, KN and high-voltage circuit do not work.

When a mouse enters the infrared detection range, the infrared light reflected by the mouse body is received by VD1, causing the 8th pin of IC1 to change from high level to low level, VL2 to light up, KN to work, and high voltage to kill the mouse. When the dead mouse is removed (the power supply should be cut off), VLS is cut off again, the 3rd pin of IC1 loses the input signal, the 8th pin becomes high level, V L2 is turned off, KN and the high voltage circuit stop working, and the circuit returns to the standby state.

Component Selection

R1-R6 use 1/4W metal film resistors or carbon film resistors; R7 uses 2W metal film resistors. C1-C4 use monolithic capacitors; C5 uses aluminum electrolytic capacitors with a withstand voltage of 25V; C6 and C7 use CBB capacitors with a withstand voltage of 1000V. VLS uses PH302 or BPW82 infrared photosensitive diodes; VD1 and VD2 use 1N4007 silicon rectifier diodes. VLl uses IR333 or SE303 infrared light-emitting diodes; VL2 uses 5mm ordinary light-emitting diodes. V uses 9013 or 3DG9013 silicon NPN transistors. IC1 uses LM567 or NE567 integrated circuits; IC2 uses LM7806 three-terminal voltage regulator integrated circuits. KN uses SP2110 or JGX-2F solid-state relays. High-voltage electrodes can be made of thinner bare metal wires or copper-clad plates.