A sensor for detecting the turning angle of a rotation shaft is separated a certain distance away from the shaft. The sensor comprises a light source for emitting light beams to a graduated color means mounted on the shaft and a light reader for reading th...

A vehicular turning indicator is used for automatically showing a turning degree of a vehicle. The vehicular turning indicator includes a sensor sensing a turning angle of the vehicle (21); a control device asserting a control signal according to the turni...