Tester McGee

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  • Electronic Mosquito Repeller-Mark

  • Created: Apr 04, 2017

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Description

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Summary

This circuit is build to repel mosquito using high frequency sound. Although this system is not quite known, it is still a convenient way to keep mosquito in a distant from the people. The design is comprised of LM555 timer which provides the pulse generation and precision timing. It is also a stable controller capable of monostable or astable operation. The 74HCT4017BQ device is a Johnson decade counter with 10 decoded outputs. It provides the signal to be fed into the 555 timer which is connected to the output piezo speaker. The piezo speaker generates the sound. The Bipolar Junction Transistors(BJT) BC337 and BC327 acts as the amplifier of the output sound. It forms the push-pull amplifier that is more efficient than a single-ended Class A amplifier. The design is ideal for household application. It provides additional protection to the family against illness. It is also a suitable substitute to chemical based mosquito repellant.