How does an ultrasonic dog repeller work? Since the maximum current that a 555 timer can supply is 200mA an amplifier stage was required so a high-power H-bridge network was devised, formed by 4 ...

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 ...

Struggling with unwanted canine visitors? We have 16 expert-recommended strategies for keeping dogs out of your yard. No matter how you feel about yard work, you know there are a multitude of things ...