Has anyone made an ultrasound bat repellent device?
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Never tried. However, you can get some idea from here. Back to repelling bats | Electronics Forum (Circuits, Projects and Microcontrollers)
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Hey @Dominic14482,
Welcome back to the forum!
Haven’t built one myself, but an ultrasonic bat repellent definitely sounds like the kind of quirky backyard project that’s right up our alley. Bats use echolocation in the 20–100kHz range, so you’d would need to generate ultrasonic noise in that frequency band to make the area less appealing (in theory, anyway).
If you’re keen to DIY it, here are some parts from Core Electronics that could help:
- Ultrasonic Buzzers or Piezo Transducers – These can emit high-frequency sound waves. You’ll find a few options on our site that operate well above the human hearing range.
- Microcontroller – A Raspberry Pi Pico or Arduino Nano can easily generate ultrasonic signals via PWM.
- Driver Circuit – If you want more volume or range, you may need to drive the buzzer with a transistor or MOSFET circuit to increase the output power.
- Power Supply – You can power it with USB or a battery pack to keep things portable.
Keep in mind that most commercial ultrasonic repellents are hit-and-miss when it comes to actual effectiveness. Results may vary depending on the environment, the bat species, and the frequency output.
Still, it’s a fun experiment, and if you accidentally summon Batman, call us. We want to know what frequency worked.
