Smart Coaster
I have a bad habit of getting so focused on my work that I forget to drink water, so I made a 3D-printed coaster with a microcontroller and a few RGB LEDs inside to visualize how long it's been since I've last taken a drink and prompt with with an alert when it's been too long.
The coaster is comprised of four main parts: a clear PETG base, white PLA body, black TPU top, and a prototype circuit board with an Arduino Micro, a momentary switch and four Adafruit Neopixel LEDs.

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