BBC micro:bit

The BBC micro:bit is a pocket-sized, ARM-based microcontroller: designed to teach digital skills with a 5x5 LED matrix, two programmable buttons, and built-in sensors.

The BBC micro:bit is a powerful, pocket-sized computer: a core tool for global digital education. Originally a BBC initiative, it partnered with tech leaders like Microsoft and ARM to deliver over a million devices to UK students. The latest V2 board features a 64 MHz ARM Cortex-M4 processor, a 5x5 LED display, two programmable buttons, and built-in sensors (accelerometer, compass, speaker, and microphone). Students use online editors like MakeCode or MicroPython, compiling code for simple drag-and-drop transfer via USB. This open-source hardware system makes computational thinking tangible, empowering users to move from technology consumers to creators.

https://microbit.org/