Electronic power saving mousetrap circuit

The energy-saving electronic mousetrap introduced in this example usually consumes very little. It only works when mice enter the control area to look for food, and then delays for 30 seconds and then enters
the waiting state. It is very suitable for hunting mice in the wild.
    (1) Working Principle Figure 23-11 is the circuit diagram of the
electricity- saving electronic mousetrap. VT1 ~
VT4 and related components form a control circuit,
whose function is to report whether a mouse enters the control
area, and to control the power supply
of the alarm and high-voltage generating circuit . IC, VT5, etc. form an alarm circuit. When a mouse enters the control area, the IC sends out an alarm signal, and VT5 drives the speaker BL to sound. The transmitter is composed of VT6 and peripheral components , with an operating frequency of 88 to 108 MHz and a transmitting distance of more than 1 km to facilitate long-distance monitoring. VT7, T, VD2, etc. form a high-voltage generating circuit, which outputs hundreds to thousands of volts of high voltage to kill mice entering the control area. When the manual switch SA is closed, the power supply supplies power to the control circuit . At this time, VTI-VT4 are all cut off, the relay K is not energized, the alarm and the high-voltage circuit do not work. When a mouse enters the trigger net, it is equivalent to adding a resistor between the A and B electrodes. VT1~VT4- are all conductive, relay K is closed, its contact K is closed, and the power supply of the alarm and high-voltage generating circuit is turned on. At the same time, the power supply charges cz through VT1 and VT2, so that when the mouse leaves the trigger net, the relay delays for about 30 seconds and then turns off. This prevents VT7 from being damaged due to long-term work, and also reduces the useless power consumption of the power supply . The alarm signal sent by the IC passes through the speaker BL carbon sound. The other modulates a high-frequency oscillator composed of VT6 and transmits it outward. At the same time, the light-emitting diodes LED1 and LED2 emit light. At this time, the rat was frightened and escaped from the trigger net t into the high-voltage electric current and was killed. When the remote monitoring personnel receive the alarm signal using FM radio, they can go to the scene and remove the dead rats promptly.