# Lesson 4

## In-built Sensors

In-built Sensors

The micro:bit has in-built sensors to measure data.

### Accelerometer

Accelerometer

An accelerometer is a device to measure **force, acceleration** and **angle**. It is useful for sensing vibrations and orientation.

### Thermometer

Thermometer

A thermometer is a device to measure temperature. It reads the temperature in degrees Celcius.

### Compass

Compass

A compass is a device used for navigation. It reads the compass direction in degrees. North is 0 or 360 degrees, East is 90 degrees, South is 180 degrees and West is 270 degrees.

## Task 1

Task 1

- Program the LED to display the angle when your micro:bit is tilted
**up and down**. - When
**Button A**is pressed, the**angle of tilt**will be displayed.

## Task 2

Task 2

**Button A**works the**same as in Task 1**.- When
**Button B**is pressed, the**current temperature**is displayed.

## Task 3

Task 3

**Buttons A and B**works the**same as in Task 1 and 2**.- When
**Button A+B**is pressed, the**compass direction**is displayed.