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Build your own ultrasonic bat detector and listen to the sounds of bats as they fly overhead.
This bat detector kit is simple to assemble but does require some soldering skills. The printed circuit board is fitted with many of the required components. All you need to do to complete the kit is to solder in the remaining parts then connect the circuit board to the microphone, loudspeaker and the control elements. A 34-page manual (in English and German) provides detailed assembly instructions.
Once assembled you can take your detector out into the field where the sounds made by nearby bats will be transformed into a frequency which is audible to human ears. Tune the detector to the correct frequency using the left-hand dial and adjust the volume with the right-hand dial.
The completed bat detector is powered by a 9V battery (not included) which will provide up to 25 hours listening time.
Please note that you will require a soldering iron to complete this kit. Not suitable for children under 14.
* DIY Bat Detector Manual
* Equipped circuit board
* Speaker 8 Ω
* Ultrasound microphone 40 kHz
* Potentiometer 22 kΩ with switch
* Potentiometer 22 kΩ
* Two rotary buttons
* IC1 78L05; IC2 LM386
* R5 470 Ω (yellow, violet, brown)
* C6, C8 electrolytic capacitor 10 µF 7
* C4, C9 electrolytic capacitor 100 µF
* Wire strands, 9-volt battery clip