I recently had to build an infrared close proximity sensor that could tell if something was dropped in a parcel delivery drop box. After some searching, I ended up using a microcontroller ... Here is ...

The robot uses a whopping 32 IR sensors to follow a black line across a concrete workshop floor, adjusting its path using a steering motor salvaged from a power wheelchair. An Arduino Mega Pro ...

He used a stepper motor to rotate the object being scanned, and an Arduino ... The Sharp sensor is cheap and decent, but you’re obviously not going to get amazing accuracy. Still, using the ...