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 imagi… ...

LFR-IR Sensor Card Circuit diagram. Our LFR has two infrared sensor cards (left and right) on the bottom of the chassis for detecting the black tracking indicant on the path. Each sensor card is a ...