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 ...

Whether it’s a simple Solarbotics photovore BEAM robot kit, the PID op-amp circuit used in this line following robot, the wide variety of analog op-amp and traditional BEAM circuitry used in ...

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.