Electronic pests repeller circuit diagram 1

Published:2011/6/12 22:54:00 Author:Lucas | Keyword: Electronic, pests repeller | From:SeekIC

The electronic pests repeller circuit is composed of the clock oscillator, counter, multivibrator and the audio output circuit, and the circuit is shown as the chart. Power supply circuit is composed of the power transformer T, rectifier diodes VD1 ~ VD4 and filter capacitor C1. Multivibrator is composed of the time-base IC IC1 and resistors R1, R2, capacitors C2, C3. C4 is the coupling capacitor; BL is the speaker. The AC 220V voltage bucked by T, rectified by VD1 ~ VD4 and filtered by C1 to produce 12V (Vcc) DC voltage for IC. When the multivibrator gets power and does oscillation work, the pin 3 will output 48KHz square wave, which is changed into the ultrasonic by BL radiated outward, then it can drive away near the pests.



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