On Mon, Mar 17, 2025 at 1:06 PM Kent Borg <kentb...@borg.org> wrote: > > On 3/17/25 5:46 AM, ma...@mohawksoft.com wrote: > > Come to think of it, you could even hook up a camera to send a picture. In > > fact, you may not need the infrared sensor at all, you could use the video > > camera and some motion detection software. There are a few available in > > raspbian. > > A camera is what I am trying to replace, sort of. > > Yes, it is extremely valuable to be able to see a picture, but motion > sensing based on that picture can be far too twitchy, particularly when > there is sunlight and wind and moving shadows. I try aiming the camera > more and more narrowly and as I reduce the alerts (slightly) the picture > becomes far less useful. But, if what I want to know about warm-blooded > critters (including humans), a passive IR detector should be great.
I seem to recall that most digital camera sensors detect IR, UV, and visible light. I have pointed IR remotes at digital cameras and saw the beam blinking on the camera display. You MIGHT be able to change the filters on a cheap digital camera to block visible/UV and have an IR camera. Justa thought. Bill Bogstad _______________________________________________ Discuss mailing list Discuss@lists.blu.org https://lists.blu.org/mailman/listinfo/discuss
