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Mouse repellent making method four

2018-04-07 17:36:25

Swett rat repellent, which can emit cat noises and scare away mice, can be used in food warehouses or commodity warehouses and other places. Circuit working principle: The electronic mouse-repellent circuit is composed of timing oscillator, cat sound generator, audio power amplifier circuit and flash control circuit.


The timing oscillator circuit is composed of time-base integrated circuit icl, resistor rl, potentiometer rpl, rp2, bipolar vdl-vd3, capacitor cl, c2 and relay kl. The cat meow generator circuit is composed of sound integrated circuit ic2, resistor r2, potentiometer rp3 and capacitor c3-c5.


The audio power amplifier circuit is composed of power amplifier IC ic3, capacitor c6-c8 and loudspeaker bl. The flash control circuit is composed of crystal v, resistor r3, relay k2, diode vd4 and small bulb el. After switching on the power switch s, the 3-pin of the icl outputs a high level, the kl draws, its normally open contact is switched on, and the cat barking circuit, audio power amplifier circuit and flash control circuit are energized. The cat meow output by pin 15 of ic2 is added to pin 3 of ic3 all the way through c6. After power amplification by ic3, the bl is driven to emit loud cat meow. The other is added all the way to the base of crystal v, so that v is stably switched on and off with the change of the cat's meow, the drive relay k2 is intermittently pulled or released, and the small bulb el flashes synchronously with the cat's meow, enhancing the mouse repelling ability. At the same time, the +6v voltage (vcc) is also charged by rl, rpi and vd2 to cl, so that the voltage of pin 2 and pin 6 of icl continues to rise. When the voltage of pin 6 of lc1 rises to 2vcc/3, the circuit in ic1 turns over, pin 3 changes from high level to low level, kl is released, and its normally open contact is disconnected. The cat meow generator, audio power amplifier circuit and flash control circuit stop working. Subsequently, cl is discharged through the 7-pin circuit of vdl, rm, and ic1, causing the voltage of pin 2 and pin 6 of icl to drop. When the 2-pin voltage of the icl drops to vcc/3, the 3-pin outputs a high level, the kl draws, and the cat sound generator and other circuits are energized.


Component selection: rl-r3 uses 1/4w carbon film resistor or metal film resistor. The rpl-rp3 uses an ultra-small organic solid potentiometer or a variable resistor. cl, c5-c8 all use aluminum electrolytic capacitors with voltage resistance of l6v; c2 and c3 use monolithic capacitors; c4 high frequency ceramic dielectric container. Both vdl and vd2 use 1n4148 silicon switching diode; Both vd3 and vd4 use a 1n4007 type silicon rectifier diode. v Choose c8050 or s8050, 3dg8050, 3dgl2 silicon npn crystal. icl selected ne555 or 5g1555, cd7555 time-base integrated circuit; ic2 uses the sound integrated circuit that stores the cat's meow, such as kd5605 and other models; ic3 uses lm386 audio power amplifier integrated circuit. Both kl and kz use type 4098 6v DC relays. el is used in parallel with several small 6.3v electric beads. bl selection of 8ω, 5w electric loudspeakers, can also be a number of 4-8ω, 0·5w speaker string, parallel, used in multiple rooms at the same time to repel rats.


Circuit debugging: Adjust the resistance value of rpl, so that the working time of the circuit such as the cat bark generator is 10-30s. Adjust the resistance value of rp2, so that the power off of the circuit such as the cat bark generator is 1-3min. Adjusting the resistance of rp3 can change the pitch of the cat's meow. A cat's meow is usually intoned into a loud meow to increase the mouse's fear.