It's easy to get focused on a task, and forget to take a break, or even eat lunch. Perhaps you find that you aren't drinking enough water throughout the day. Sometimes you simply need some assistance remembering things! This project is here to help.

This guide will show you how to build a customisable LED timer using the Adafruit QT Py, the LIS3DH accelerometer, and two NeoPixel LED rings. It's meant to be compact and sit on your desk. The rings light up to let you know the timer is running. Set it on its side to turn off the timers and the LEDs.

For the activity timer, you'll set a duration for two different activities, such as 120 minutes of work and a 15 minute break. Plug it in, start the timer and it will gently fade between two colors to let you know time is passing. When it reaches the end it stays at that color for a bit before blinking at you to remind you that you haven't moved to the next task. Flip it over to begin the second timer, and the process repeats.

For the hydration reminder, you set the interval you'd like to be reminded to drink water, such as once every 60 minutes. Plug it in, start the timer, and the process is the same as the activity timer. In this case, when you flip it over, it counts down the same amount of time.


This build uses the 50mm long STEMMA QT cable listed below. The 100mm long STEMMA QT cable would also work, but would require taming the extra cable length.

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This guide was first published on Oct 22, 2020. It was last updated on Jun 22, 2024.

This page (Overview) was last updated on Mar 08, 2024.

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