Microbit monitor adapter for office Busy-Free

I created this little project as a way to avoid undesired interruptions at work. With the A button you can change the your state between "free" and "busy". You can also turn off the LED matrix display. With the B button you active a 20 minutes Pomodoro. The Matrix columns will fill the screen to show the progress of your pomodoro.

https://youtu.be/e-UqSdW36Fw

You can also connect your smartphone via bluetooth. If someone calls you the Microbit with show a message saying that you are in a c