This ultrasonic dog repeller circuit will chase away angry dogs. It is build with the all known 555 circuit, a buzzer and a little ferrite transformator. The ultrasonic frequency must be set with a ...

The electronic dog repeller circuit produces a discomforting but not harmful, high frequency sound, audible to dogs but not to humans. Help stop the approach of unwanted dogs at up to 15 feet. It uses ...

Two-wheeler riders who often come under stray dog attacks have something to cheer about. A group of engineering faculty members have come up with ‘Sudog’ (Super Dog Chaser), a device that would ...

Unlike traditional single-frequency bark deterrents, the PawBehave Variable Dog Bark Deterrent introduces a 10-level adjustable ultrasonic technology ranging from 21kHz to 30kHz. This innovation ...