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 ...

When we hear the word “Ultrasonic” we often refer it to bats and dolphins communication. Technically, “Ultrasonic” applies to sound that is anything above the frequencies of audible sound, and ...

There are a lot of options to rid your home of rodents and insects, but only the best ultrasonic pest repellers can do it humanely, and with little effort on your part. While any plug-in pest repeller ...

PANCHKULA: The municipal corporation (MC) is all set to install ultrasonic dog repellent in three parks on a pilot project basis in a bid to counter the stray dog menace. MC commissioner Rajesh Jogpal ...