Home 2018 Forums Crumble Development Proximity and PIR Crumb sensors seem temperamental Reply To: Proximity and PIR Crumb sensors seem temperamental


Ye -same problem with Proximity Crumb when I tried last term. I think 4Tronix wer egoign to make them a bit less sensitive for future batches. All IR sensors have the same problem but since these are normally sitting up on a desk – they are subject to a lot of ambient light.

An old trick with these sort of sensors is to get a small black rubber tube and place over sensor so that they become much more directional but I’ve not tried that yet with these ones but that technique has proved effective on robots with IR sensors.

Re PIR sensors – ALL PIR seem to behave randomly (due to the rate of change of signal principle that they work on)

They are designed to work at a distance so you have to program them on trust – mount them in position – move well away – then approach and see what happens. They detect lateral movement much more than to and from