First steps in using BBC micro:bit for control and physical computing

Since the BBC micro:bit became commercially available last year there is much more information now available about how to access the many features which make the micro:bit such a powerful tool for cross-curricular STEM projects.  This guide is mainly concerned with how to create programs in the Microsoft PXT block editor to sense and control with the micro:bit.  This includes building `smart' devices such as lights which come on as it gets dark, brake lights for your bike, automatic watering systems for plants, checking the light and temperature remotely, robotic vehicles etc.  The activities are mainly centered around the D&T, Computing and electronics (Physics) aspects of the curriculum - or just for fun tinkering.  A companion piece will look at the use of micro:bits with Bluetooth for sensing data and modelling it with other software such as Excel and Geogebra - with more of a slant towards maths and science.  

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