The timer sports all of your basic countdown-timer functions including a 4 digit 7-segment LED output display ... and +15 second buttons. There is even a happy/sad button to toggle between ...
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.
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