ArduinoGeneral Gravity

Ultrasonic Bat Detector

userHead Paul.Arthur 2023-11-25 09:45:35 244 Views1 Replies

Hi - first time poster, did a bit of searching on the forum, but didnt find an answer - looking for help,

In New Zealand we have only 2 mammals - both bats. 

Near us is the long tailed bat - which echo locates using clicks around 40khz 


I note the sensor uses Acoustic Frequency: 38~42KHz which sounds ideal



Can we use this range finder to listen for the bat clicks only - eg no PING, just a level of received sound

Im guessing it needs to emmit a ping before any I2C or other signals are raised.
Does an LED light up when ~40Khz sound detected - i could work with that with arduino.


If we can easily use these low cost sensors as a detector - it would solve a lot of our bat population questions.


Any other sensors recommended would be greatly appreciated.


Thanks in advance


New Zealand

2023-12-01 11:50:10

I think this does work, but we recommend that you actually use a SEN0257 for testing.

In loop you just need to set PinMode to INPUT and then get the Pulse Width.

If that doesn't work, you can try using an interrupt to capture the level change.

userHeadPic Yeez_B