Project 1 Notes Cont...
https://maker.pro/pcb/projects/how-to-build-your-own-bat-detector
-ultra sonic receiver and KHz translator
https://www.instructables.com/id/Bone-Conducting-Earphones/
-turn headphones into bone conduction headphones
https://www.vellemanstore.com/en/velleman-k8118-stereo-ultrasonic-sound-and-bat-detector
-ultrasonic detection device
http://www.nutsvolts.com/index.php?/magazine/article/june2011_berber
-build your own bat detector
http://home.earthlink.net/~bat-detector/StepByStep.html
-another bat detector
https://www.amazon.com/Franzis-Make-your-Detector-Manual/dp/3645652760/ref=sr_1_5?adgrpid=57423585503&hvadid=292120962862&hvdev=c&hvlocphy=9011692&hvnetw=g&hvpos=1t1&hvqmt=e&hvrand=4187859781789786923&hvtargid=kwd-297143265104&keywords=bat+detector+kit&qid=1550517596&s=gateway&sr=8-5&tag=googhydr-20
-bat detector kit and manual
-ultra sonic receiver and KHz translator
https://www.instructables.com/id/Bone-Conducting-Earphones/
-turn headphones into bone conduction headphones
https://www.vellemanstore.com/en/velleman-k8118-stereo-ultrasonic-sound-and-bat-detector
-ultrasonic detection device
http://www.nutsvolts.com/index.php?/magazine/article/june2011_berber
-build your own bat detector
http://home.earthlink.net/~bat-detector/StepByStep.html
-another bat detector
https://www.amazon.com/Franzis-Make-your-Detector-Manual/dp/3645652760/ref=sr_1_5?adgrpid=57423585503&hvadid=292120962862&hvdev=c&hvlocphy=9011692&hvnetw=g&hvpos=1t1&hvqmt=e&hvrand=4187859781789786923&hvtargid=kwd-297143265104&keywords=bat+detector+kit&qid=1550517596&s=gateway&sr=8-5&tag=googhydr-20
-bat detector kit and manual