- 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.
