This is a three part model for a working pomdoro timer with 25 LEDs, one for each working minute. Printing is easy, you just need the following electronics to get it working:

ESP32 Development Board: [https://www.amazon.de/dp/B08BTQ57ZV](https://www.amazon.de/dp/B08BTQ57ZV)

25x WS2812B LEDs (NeoPixel Strip): [https://www.amazon.de/dp/B01CDTEJR0](https://www.amazon.de/dp/B01CDTEJR0)

Button: [https://www.amazon.de/DAOKAI-Momentary-Miniature-Electronic-Components/dp/B09WVFHMSV](https://www.amazon.de/DAOKAI-Momentary-Miniature-Electronic-Components/dp/B09WVFHMSV)

Micro USB Charge Socket: [https://www.amazon.de/dp/B09WQTR1H3](https://www.amazon.de/dp/B09WQTR1H3)

All links are non-affiliate links from german Amazon just for reference.

This model was built and featured in our YouTube Video: