Components of the BBC micro:bit

Components of the BBC micro:bit

The BBC micro:bit is made up of several built-in components that allow it to take input, process information, and produce output. One of the main components is the LED display, which consists of a 5×5 grid of LEDs used to show numbers, symbols, and messages. The micro:bit also has two programmable buttons (A and B) that allow the user to interact with programs, such as starting, stopping, or resetting an action.

The parts of the BBC micro:bit

USB Connector

The USB connector is used to connect the micro:bit to a computer. It allows programs to be transferred onto the micro:bit and also provides power to the device.

Microphone Indicator

The microphone indicator is a small LED that lights up when the microphone is in use. It helps the user know when sound is being detected or recorded.

Touch Logo

The touch logo is a capacitive touch sensor. It detects when a finger touches the logo and can be used as an input, similar to a button.

25 LED Lights

The micro:bit has 25 LEDs arranged in a 5×5 grid. These LEDs are used to display numbers, letters, symbols, and images, such as showing the step count.

2 Buttons (A and B)

Buttons A and B are input buttons that allow the user to interact with the program. They can be used to start actions, reset values, or control the program.

Radio

The radio allows the micro:bit to communicate wirelessly with other micro:bits. It is useful for sending and receiving data without cables.

Pin 0, Pin 1, Pin 2

These are input/output pins used to connect external components such as sensors, LEDs, and buzzers. They allow the micro:bit to interact with the outside world.

Pin 3V

The 3V pin provides power to external components connected to the micro:bit.

Pin GND

The GND (ground) pin completes the electrical circuit and is required for external components to work correctly.

Radio Antenna

The radio antenna allows the BBC micro:bit to send and receive wireless signals. It is used for radio communication between micro:bits, enabling them to share data without using cables.

Microphone

The microphone is a sound sensor that detects noise levels. It allows the micro:bit to react to sounds such as clapping, talking, or loud noises in sound-based projects.

Reset and Power Button

This button is used to restart the program running on the micro:bit. It can also be used to turn the device on or reset it if the program stops responding.

Battery Socket

The battery socket is used to connect a battery pack, allowing the micro:bit to run without being connected to a computer. This makes it portable and suitable for wearable or outdoor projects.

Processor

The processor is the brain of the micro:bit. It runs the program, processes data from sensors, and controls all outputs such as LEDs and sound.

Speaker

The built-in speaker produces sound output, such as beeps, tones, or music. It allows the micro:bit to give audio feedback to the user.

Edge Connector for Accessories

The edge connector provides electrical connections for accessories and expansion boards. It allows the micro:bit to connect to motors, displays, and other external hardware.

Compass and Accelerometer

These are built-in sensors. The compass detects direction using Earth’s magnetic field, while the accelerometer detects movement, shaking, and tilting. These sensors are commonly used in navigation and motion-based projects such as step counters.