Electronic mousetrap circuit

 (1) Features
    1) The rotary mousetrap lures mice in from i directions. Since the captured rats are non-toxic, they will not
cause poisoning to humans and animals after the dead rats decompose and become contaminated, as is the case with drug-based rodent control. It will not be accidentally eaten by cats and other animals and cause serial poisoning.
    2) It leaves no trace or smell and can continuously catch mice. we know. Mouse traps and high-pressure rodent killers will leave a bloody odor that will keep mice
away from them for a long time. And the smell is hard to get rid of. After the rat is trapped in the rotary mousetrap, it is led outside the box to be killed.
    3) Safe and convenient. Both AC and DC can be used.
    (2) The working principle circuit is shown in 23-8. After the circuit works normally. The VD1 photodiode receives infrared light and turns on, causing VT1-
VT4 to be in a cut-off state at the same time, and the relay does not close. When a mouse enters the mousetrap, its body blocks infrared light. The reverse resistance of VD1 becomes
larger, VT1 is turned on immediately, the transistors in the latter two stages of the circuit are also saturated and turned on, and the relay K is closed. After the electromagnet is energized, the revolving door hook is pulled
open, the three entrance doors of the mousetrap are closed at the same time, and the alarm circuit sounds an alarm sound. At the same time, the revolving door that is closed in place touches the S micro
switch in time to cut off the power supply to the electromagnet to avoid burning the electromagnet coil for too long.
    Infrared emission uses a waste TV remote control, cut off the circuit board of the button part (to reduce the size), and then short-circuit any button with a wire
to keep it transmitting. The disc-shaped spring used in the revolving door is replaced by the spring in the washing machine timer. The 12V electromagnet is wound with a small E-type
iron core, and the suction force only needs to be able to pull open the revolving door hinge. The debugging of the circuit board needs to be carried out after the distance between the transmitting and receiving diodes is determined. Adjust
the RP potentiometer so that the relay is in a static state without obstruction, and it can be closed immediately after blocking the infrared light.