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The BBC micro:bit has a 5x5 array of surface mount LEDs that allow it to display one character at a time or rudimentary graphics. I find the LEDs to be a bit too far apart to easily read the characters displayed - the dots(pixels) don't look connected when displaying a line as a row of dots. Also the LEDs that are not illuminated are quite visible which tends to confuse what is being displayed. I also find the LEDs to be painfully bright. I have been experimenting with ways to improve the di ...
This is Part 2 of the Micro:bit version of the someone behind you sensor.   For those who did part 1, this one adds an addressable LEDs to indicate when the PIR motion sensor is triggered. It also has a secondary nightlight mode that turns on the LED strip for approximately 60 seconds.   This project is a complete system. So, you do not have to go and build Part 1 if you do not want to.     Now let’s gather all the necessary components you’ll need to build thi ...
The Someone Behind You Sensor idea (for Arduino) is one of the most useful but simple projects I ever made. I thought it would be worthwhile to port it over to the BBC Micro:bit. The original idea was to have some LEDs placed on a desk, where the user would position the motion sensor in such a way where anyone sneaking up behind them would trigger the LEDs and alert the user to “someone behind them.”   It is also a lot of fun for interactive projects. Once you learn how to use ...