The microcontroller-based concept was chosen because I wanted to scale the sensor system later to suit other applications. Here is the diagram of my Arduino infrared close proximity sensor. As you can ...

This ultrasonic radar project is from [mircemk] who uses a small ultrasonic distance sensor attached to a rotating platform. A motor rotates it around a 180-degree field-of-view and an Arduino ...

[mircemk] shows how to create a simple non-contact proximity sensor using little more than an Arduino Nano board, and a convenient software library intended to measure the value of capacitors.

DIY blog Mad Science has put together a tutorial to roll your own sensor system with an Arduino. The build is incredibly simple and you only need a ping sonic range finder, Arduino, a buzzer ...

The physics of the situation makes it possible to measure either distance or velocity from either type of electromagnetic wave—there are lidar speed sensors and radar range finders. But in ...

Researchers at the University of Michigan have made what is in effect a very agile ruler using a novel sub-THz radar technique ... and across a desktop it measures the range to a target with sub-mm ...