These pages describe my efforts in building a so-called bat detector, a device that is capable of converting the ultrasonic sounds emitted by bats to sounds that humans can hear. This web page contains mostly technical information; for general information on bats please take a look at my bat links.

12/16/2006: Updated links
7/28/2005: Merged 'buying a bat detector page' into this page. Removed some old out-of-date pages.
6/12/2005: Added link to Yasushi Sugimoto's page
5/01/2005: Updated links to frequency division circuits
6/22/2004: Updated links

Site map for my bat detector pages

This is a list of all pages on my bat detector web site. Some of the links point to external websites.


How a bat detector works

Bat detector plans

Buying a bat detector

Circuit ideas

Last update: October 18th, 2006