This kitchen timer is powered by a lipo battery with an Atmega 328p a 32kHz quarz to provide correct timing. I did a lot of primer filler and a lot of sanding to have a smooth surface. After sanding I used acrylic spray paint.

The code is located at [https://github.com/hggh/kitchen-timer](https://github.com/hggh/kitchen-timer)

functions:

• warns at low battery
• display: MM:SS timer from 30 seconds to 90 minutes
• display a message if battery is fully loaded
• alarm time is configureable from 0,5 seconds to 20 seconds (beeping)