What's your orientation ? With the Orient4D, obtain the orientation of any object in a quaternion representation, which allows you to know the orientation while continuously rotating the object 360 degrees in any direction, ie. around any of its three axes. Can also output orientation in Euler angles (better known by its components heading, pitch and roll), but this method has the so-called "gimbal lock" limitation, ie. if you rotate the sensor 360 degrees continuously the sensor values will increase (decrease) upto a point and then decrease (increase) again resulting in the same values for different orientations. This sensor computes its orientation from magnetic field strength, linear acceleration and angular velocity, so this raw data is also available in its X/Y/Z axes. So you can use it simultaneously as a 3D magnetometer, accelerometer and/or gyroscope. How's that for some sensor data ! Perfect for gesture sensing. A digital I²C sensor, that outputs cailbrated, high resolution, low-noise signals.