Instructables user [Jones Electric] has been quite busy lately, building a radio-frequency range finder. Built as part of a German youth science competition, he and his partner built a pair of ...

An ultrasonic range finder is a useful tool in a variety of real-life and robotic applications, such as in obstacle-avoidance and distance-measurement systems. The ultrasonic range finder measures the ...

With its Tour X Jolt laser range finder, Bushnell Golf has a distance-measuring device that seemingly does everything. It allows users to measure distances (up to 450 yards to a flag) and can adjust ...