The electronic dog repellent circuit diagram below is a high output ultrasonic transmitter which is primarily intended to act as a dog and cat repeller, which can be used individuals to act as a ...

3 POWERFUL ULTRASONIC SENSORS: This bark deterrent device there are two types of ultrasonic frequencies, Avoid dog getting used to single frequency, It can emit 25KHZ fixed frequency and 25-30KHZ ...

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 ...

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 ...

We just finished renovating our stoop and one or more dogs (or their less than responsible owners) have decided it’s a great place to relieve themselves. Do the dog repellent sprays work or are there ...