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 ...

Range finders are used for a wide range of tasks, from measuring the distance to an object a few feet away to the distance between the moon and the earth. They work by sending a group of energy pulses ...

The Marine Corps is planning to field new high-tech combat gear — a ­rifle-mounted laser range finder — that will give squad leaders some extraordinary new capabilities and revolutionize the way the ...