Accelerometers and gyroscope

Let's first start with accelerometers. As the name suggests, these are meant to measure acceleration in any body. Hence, whenever there is any acceleration in any body, then the accelerometers have the work to sense that acceleration and give the corresponding reading. 

A gyroscope is a device that uses Earth's gravity to help determine orientation of the robot. An accelerometer is a device designed to measure non-gravitational acceleration. Whenever there is any acceleration, the crystals in the accelerometer excite and provide a voltage corresponding to it.

The main difference between these devices is simple: the gyroscope can sense rotation, whereas the accelerometer cannot. In a way, the accelerometer can gauge the orientation of a stationary item with relation to Earth's surface. When accelerating...