![]() The accelerometer allows the device to know which way is down and how fast it’s moving in a given direction. ![]() This is why your phone can silence itself when turned face down. This is also sometimes referred to as 1 “g” of force. While at rest, the sensor will return no acceleration forces on two of its axes, but one axis should be feeling acceleration of 9.8m/s/s. Since the acceleration measured by the sensor includes the force that gravity is exerting on it-and since we know that the acceleration of gravity (barring any other forces applied to an object) is 9.8m/s/s-this lets the sensor determine which direction its facing. When the sensor moves in a certain direction, it returns a value for how fast it moved along all its axes, measured in meters per second squared. However, you can also add this same capability to your Arduino project with a simple sensor.Īccelerometers are remarkably tiny sensors that use micro-machined structures to measure the acceleration that the sensor is feeling along three axes, denoted by X, Y, and Z. ![]() You can see this in action when using the compass in your maps app or when using motion controls in a game. Your phone has an accelerometer in it that lets it measure acceleration in different directions, which can help the phone determine its own orientation. ![]()
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