Ultrasonic Bat Detector

Ultrasonic Bat Detector

An ultrasonic detector of 40KHz sound. A frequency close to the echolocation "chirps" made by many common bats found in the United States and elsewhere.

Circuit will amplify the "chirp" over 200 times and display its strength on a 10 LED bar graph.

Circuit will also reduce the frequency by 10% and emit a sound generated from the resulting 4k square wave.


Radiotech (May 19, 2017)
for some reason I really like this idea. I can see the benefit of learning about ultrasonic as well as people enjoying playing in the back yards...