Obstacle Detector and Distance Measurement System This Arduino project utilizes a Passive Infrared (PIR) sensor to detect the presence of obstacles and an ultrasonic sensor to measure the distance to ...

This project demonstrates how to use an ultrasonic sensor to measure distance from objects and display the result on a 16x2 LCD screen using an Arduino board. Ultrasonic sensors are commonly used for ...

Reader [Joshua] sent in his latest project. using a sonar rangefinder, an Arduino, and some clever programming, he’s made is computer react to his distance from it. As you can see in the vide… ...

When we do find them they’re usually worth your time, as is the case with this Forest Fire Detector by Sigfox software engineer Louis Moreau.

We’re still not sure exactly how [connornishijima]’s motion detector works, though many readers offered plausible explanations in the comments the last time we covered it. It works well… ...