Bat Detectors
From Hackteria Wiki
http://home.earthlink.net/~bat-detector/BatDetector.html
Contents
SGMK version
Links
Overviews
Simple DIY BatDetectors
Arduino based Bat Detectors
Heterodyning BatScanners
Bat Communities
http://batconservationindia.org/
http://www.xn--flderms-6wa4ta.ch/unterhaltung/webcam/beggingen.html
Bat Planet UK, has many detectors from Ciels