The TeensyBat detector is a close cooperation between Edwin Houwertjes (hardware) and Cor Berrevoets (software). Development started in 2018 and since then both software and hardware have gone through major changes. We aim at providing a low-cost build-yourself bat detetector for anyone.

Software: This Github repository contains the latest release (build 2023 01 25):
https://github.com/CorBer/teensy_batdetector/

Hardware: Edwin has developed a great PCB (current version 0.8) that allows you to build our detector with minimal skills.
More details can be found at his website https://www.teensybat.com

This image shows the v0.7 PCB version. We now use more SMD parts, quieter switches and Teeny4.1 board. 

Main features:

• 2.8inch color display that shows a live spectrogram and low,peak and high frequencies.
• Heterodyne, Auto-Heterodyne and Frequency division listening modes. (on headphones)
• Recording up to 384kHz sample rate to micro SD card. (maximum standard supported size 32Gb, Class10 or better required)
  (Over 32GB (SDXC) cards can be used if formatted to FAT32 using FAT32formatter)
• Playback on slow speed (1/5 to 1/20 ratio) or full speed (full speed only works up to 281kHz sample rate)
• Rechargeable lithium battery that easily last a whole summer night. (standard USB (C) charger is needed)
• External powersupply by standard phone powerbank or charger.
• Ultrasound  tiggered autorecording 
• Small size 116x68x36mm (4.7x2.7x1.5in)

Bootlogo

If you like the bootimage you can watch it here.... so you don't have to keep switching off and on your detector .

The photo is taken by Paul van Hoof who makes the most amazing photo's of bats and other wildlife.

Have a look at his website and be amazed.