Looking for something with a bit more style than the traditional kitchen timer, [Martin Jonasson] decided ... the idea using a rotary encoder, 16×9 LED matrix, and a Teensy 2.0 microcontroller.

This project is similar to Project 6 but here the microcontroller's timer interrupt is used to refresh the displays. In Project 6 the microcontroller was busy updating the displays every 10ms and ...