Then it will turn on only at dusk. I have also tried cover the sensor with combination of different color, and/or multiple layers, same result. It’s also less sensitive to light changes, shadow movement, etc, But the best thing is you can position it in a place more isolated and accurate than the camera, which needs power. It seems to me that the basic problem is the detector mounting height. You can find examples of how to do this on the motion trigger Tips & Tricks page here: http://littlebits.cc/tips-tricks/fridays-tips-tricks-the-motion-trigger. You must log in or register to reply here. How to shrink field of view of IR sensor: OP refers to IR motion sensor. cover the PIR sensor with transparent plastic with different color (green,red, yellow, orange, white), it can reduce the range of my PIR sensor, but also make it very un-reliable. It is enough that the object (leaf, grass) will have the temperature of the surrounding air, and the soil will be warmer (warmed up during the day). Step 4 Loosen the bulb holder clamps manually, point the bulb holders in the approximate direction needed and retighten the clamps. I refined this further by cutting the base of the foil tray and shaping it to the dome.and taping it back with Selotape. Too sensitive PIR detectors - how to reduce sensitivity? Since the PIR works on temperature differential, you might try making the room cooler- thus a warm body contrasted to the cold room would see more differential signal in the PIR. Many PIR sensor modules have a potientiometer for adjusting sensitivity as well as for time on after activation. I don't know anymore. Paul_KD7HB That PIR module is a raw PIR sensor connected in a general purpose op-amp circuit, provided by a LM324 series quad operational amplifier. http://dev1.auroralighting.com/Produkt/Innenbeleuchtung/Schrankbeleuchtung/Schrankbeleuchtung-Zubehor/Plastic-Fixed-120°-2m-range-PIR-Detector-Lighting-Control.aspx, ISO current-spike-detector for stepper limit detection, 12V to 12.6V boost with current limit for 1Amps. The lenses are key- try removing the lens and see what happens- no workie any more. A By accident this model is not intended for indoor use? With this new feature, you can reduce sensitivity if you are getting false alarms due to very short movement lasting less than a second. we want it to detect cars or large objects. If I'm muddy, somebody correct me. (Scotch tape.). This is a pretty good idea for manufacturing: the PIR sensor and circuitry is fixed and costs a few dollars. Test example setup: Place a small carton over the sensor - cut a hole in it for the tube. I have already experimented with microwaves and these in turn would have to be hidden under the boards. I don’t see an adjustment on the module. Too sensitive PIR detectors - how to reduce sensitivity. My browser no longer is binding static IP, Floating is the way to go. Wrap the foil tape around the cylinder with a bit hanging off the one end On the end with a little extra foil tape, connect that towards the PIR sensor In my case the cylinder creates a field of view approx 2 or 3 feet wide and about 12 feet long (maybe less). Many PIR sensor modules have a potientiometer for adjusting sensitivity as well as for time on after activation. This could lead to over-sensitivity, and false positives. Use masking tape around the sensor for a temporary adjustment and locate the area which works for your sensitivity. Just trying to see if there’s a way to use a motion sensor where we don’t want it to go off if you blow on it. I don’t have one. Thank you very much for proposing a new subject! ‹ Go back to the blog. PIR motion sensors are sensitive to object heat, so it is preferable for the indoor use, to detect persons entering a protected room.

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