Dog Repellent Signal Generator

This project presents the design and development of a Dog Repellent Signal Generator, a compact and efficient electronic device that emits high-frequency ultrasonic sound waves to deter stray or aggressive dogs without causing them harm. The device operates on the principle that dogs can hear ultrasonic frequencies (typically above 20 kHz), which are inaudible to the human ear but uncomfortable for canines. By generating a controlled and safe ultrasonic signal, the system offers a humane alternative to physical deterrents. The core components include a frequency generator circuit, an amplifier, and an ultrasonic transducer. The device is powered by a portable battery source, making it suitable for personal safety, delivery personnel, joggers, and outdoor workers. The paper discusses the circuit design, component selection, frequency tuning, and field testing of the repellent system. The results demonstrate effective deterrence within a specific range, validating the practical application of ultrasonic technology in non-lethal animal control.