2 ms·
Oh, THAT'S why entrance barriers at supermarkets only occasionally fail, but fail consistently on a given day... Wait. Would this happen to PIR-based systems?
by exikyut 6y ago
Oh, THAT'S why entrance barriers at supermarkets only occasionally fail, but fail consistently on a given day...
Wait. Would this happen to PIR-based systems?
- ravenstine 6y agoI'm not sure. It seems at least possible with supermarket doors because those supposedly use a low-power microwave beam. With PIR, it still relies on a deflection of a beam, so I think it would be a problem with that as well, but I'm just guessing.
- detaro 6y agoPIR doesn't have a "beam", it detects temperature changes (i.e. you, a warm object, moving around). Clothes could play a role, not sure if the color though.