Compass Sensor : Working & Its Applications

• This is a Compass- which depicts the direction by marking the needle towards the north direction. It is used for navigation.

• The needle is used in MAGNETIC COMPASS, but have you ever thought of a COMPASS SENSOR or DIGITAL COMPASS SENSOR.
• A compass sensor is a device that senses a low magnetic field and depicts the geographical direction. It uses the hall effect concept by sensing an external magnetic field.
• It can be understood more clearly by overlooking HALL EFFECT SENSORS.

• Hall Effect devices are which are activated by an external magnetic field by using 2characteristics of the magnetic field that is the– flux density(B), and polarity (North & South Poles).
• This sensor generates an output voltage when the magnetic flux density around the sensor reaches a threshold value.
• The voltage is called Hall Voltage which is directly proportional to the strength of the external magnetic field around the sensor.

Working Principle of Compass Sensor

• The working principle of the compass sensor is that the magnetic sensor present here gives an output that is proportional to the amount of magnetic field around the sensor.
• Three-terminal linear devices that are powered by a stabilized 5 volt obtained from the fixed-voltage regulator IC1.
• Each sensor’s output is a DC voltage that adjusts linearly through an idle value of 2.5 volts as their position relative to the magnetic field’s lines of force shifts.