Hmmm… Hacking the Iris motion…
Testing these out as barrier sensors.
Mounted for initial testing…
Initial testing is very good, these act very much like laser barrier sensors. The detection cone is an inch or less at 3-4’ from the sensor.
I’m going to burry these behind switch plates (with a hole drilled for the tube) to detect movement through areas, like doorways, halls and the like.
The goal is to get past the pet detection problem.
Here’s your parts list for the above…
Heat shrink, and a tube.
I used these as I had them laying around, but the ferule end is nice as it prevents the tube from slipping out of the shrink.
I’ll report on the effectiveness of this over the next few days as I test this out.
UPDATE:
2015-10-13 I think the tube I used has too small of an ID. I’m getting about 75% - 85% trigger success with the tube shown in a casual “walk by” the device. So off we go today to get some bigger tubing.
2015-10-15. So I replaced the tube shown above with a 3/8" OD by 1" tube, now I get 100% success on triggering. The detection zone is quite a bit larger, maybe 8-12 inches now. I have two of these, one at each end of my second floor stairway, tucked under the handrail. The cat walks under them people walk through them. I’m considering this as a success for use as threshold trigger.
