ELECFREAKS microbit is supplied by the training organisation in Singapore TINKER CADEMY, which has a professional team and a solid academic training. You get a variety of sensors and many project lessons to help you create dozens of amazing projects for small finders!
ELECFREAKS Octopusbit is a type of breakout board for microbit. It can bring out a GPIO port, serial port, IIC port and SPI port on the microbit board. The key feature of Octopusbit is that it can switch the electrical level for some GPIO ports, which makes microbit possible to adapt to 5V sensors. 
Temporarily out of stock