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The purpose of this project is to design and development of an ultrasonic pest repellent. Such a device can be very useful to resolve the various problems caused by ants, insects, pests, rodents, etc. The device is compact, cheap, and it does not cause any pollution unlike the other chemical repellents. We have used a microcontroller to generate sweep in sound frequencies, and an assembly consisting of audio power amplifier, speaker and LCD for this purpose. The technical details of this project follow later. The circuit has been experimentally tested on ants, bugs, and small insects, and it has been successful in repelling them through the generation of ultrasonic frequency sound.

Solar Powered Smart Ultrasonic Insect Repellent with DTMF and Manual Control for Agriculture