Block diagram of the STMicroelectronics LSM303C eCompass chip (Image: ... I thought you needed your GPS coordinates to accurately determine true north using a magnetic compass.

A magnetic field is invisible, but it can be detected using a magnetic compass. A compass contains a small bar magnet on a pivot so that it can rotate. The compass needle points in the direction ...

The magnetic compass — used in navigation for hundreds of years — is a tool that helps you find your way. Good beginner hiking/orienteering compasses can be found online or in outdoor sections ...

The compass consists of a domino-sized chip filled with rubidium-87 atoms heated to exactly 113 degrees. These magnetically sensitive atoms orient themselves in certain ways when in the presence ...