3 ms·
Maybe because something needs to be at each end, to shine a laser at one end and to detect it at the other. Or you could use a reflector, but that's still two o
by adrianmonk 7y ago
Maybe because something needs to be at each end, to shine a laser at one end and to detect it at the other. Or you could use a reflector, but that's still two objects.
- NikkiA 7y agoYou don't need a reflector in the majority of cases, shining an IR laser onto a wall/door frame a couple of meters away is usually a big enough bright spot to drive a phototransistor pointing at (nearly) the same spot.
- BoorishBears 7y agoIt's not using the TX and RX sides to form a beam, it's using a ToF distance sensor.