On Sat, 30 Jul 2005 12:04:32 +1200, Jasen Betts
wrote:



You may have to go with some form of optical motion detector.
(PIR is no good insects are cold blooded,

---
PIR _is_ optical, and could work if a focussed, or tightly
collimated IR beam were played upon the IR detectors and interrupted
by the insect, since what a PIR detects is a _difference_ in
temperature.

--
John Fields
Professional Circuit Designer