The BBC micro:bit is a versatile, pocket-sized computer designed to introduce users, particularly students and hobbyists, to the world of programming and digital innovation. Here’s an overview of what the micro:bit does and its key features:
What it Does
The micro:bit is an easily programmable Single Board Computer (SBC) that allows users to create a wide range of projects, from simple games and interactive displays to complex scientific experiments and wearable devices. It serves as a powerful tool for learning programming concepts, electronics, and digital skills.Key Features
Display and User Interface
- The micro:bit features a 5×5 LED matrix display, consisting of 25 individually programmable LEDs. This display can show pictures, words, numbers, and even act as a basic light sensor to detect ambient light levels.
Buttons and Inputs
- It includes two programmable buttons (A and B) on the front, which can be used separately or together to trigger various actions in programs. The new version of the micro:bit also includes a touch-sensitive gold logo that can be used as an additional input.
Sensors
- The micro:bit is equipped with several sensors:
- Accelerometer: Measures forces in three dimensions, allowing projects to detect orientation, motion, and gestures.
- Compass: Measures magnetic fields in three dimensions, enabling the detection of magnetic North and the strength of magnetic fields.
- Temperature Sensor: Built into the processor, it allows users to measure the temperature of the environment.
- Microphone: In the latest version (V2.x), the micro:bit includes a built-in microphone to measure sound levels and respond to sounds. A microphone LED indicates when the microphone is active.
Connectivity and Communication
- The micro:bit supports wireless communication via:
- Radio: Allows communication between micro:bits using a simple small-packet broadcast radio interface.
- Bluetooth Low Energy (BLE): Enables communication with other devices such as computers, mobile phones, and tablets.
Audio Capabilities
- The latest version (V2.x) of the micro:bit includes a built-in speaker, allowing users to add music and sounds to their projects. It also features a microphone for sound sensing.
Power and Interface
- The micro:bit can be powered via a micro-USB cable or two AAA batteries, making it portable and convenient for various applications. It also includes a micro-USB socket for downloading programs and a reset button for restarting the device.
Expansion and Connectivity
- The device has several GPIO pins and an Edge Connector that allow users to connect external electronics, such as headphones, simple switches, motors, and robots. The new version has indentations to securely grip crocodile clips.
Additional Features
- USB Interface: Allows for program downloads and communication with a computer via a micro-USB cable.
- Battery Socket: Enables the use of two AAA batteries for power, making the device portable.
- Indicator LEDs: The new micro:bit includes a red power LED and a yellow USB LED to indicate power status and USB communication.