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 ...

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… ...

In the second phase, the logic operates two drive motors (left and right) as per the informed track status. The infrared sensor card contains infrared light emitting diodes and infrared photodiodes.

This is usually mounted at the bottom of a line following robot chassis. ... You will see the status LED wakes up instantly when your hand is close to the infrared sensor part. That’s it! HW-006 ...

It has a distance sensor to calculate the distance to walls and objects, an accelerometer, light-sensing phototransistors to seek out light or dark, edge detection sensors, infrared transmitters ...