The infrared emitter and infrared receiver should be mounted side by side as in the case of the active-optical reflectance-based proximity sensors. Also, be careful not to let the emitter and receiver ...

Some readers may recall building a line-following robot during their school days. Involving some IR LEDs, perhaps a bit of LEGO, and plenty of trial-and-error, it was fun on a tiny scale. Now ...

Rather limited for 3 x $400 = $1,200 worth of sensors. The Sharp GP2Y0A21YK IR distance sensor can do the same thing for $14 each, albeit with a lower update rate and distance range; but easily ...