This mouse and rat repellent circuit is designed because most people agree that rats and mice are not welcome in our houses, meantime some of us don’t want to hurt this creatures.
Using an CMOS 4047 that is connected in such way it can function as an relax oscillator with frequency between 5 KHz and 30 KHz adjusted with P1.
Unfortunately we can not guarantee that this mouse and rat repellent does his job so you got to change the repeller frequency, not allowing mices or rats to get used with the sound.
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