Overview

This guide was written for the Gemma board, but can be done with either the v1, v2 or Gemma M0. We recommend the Gemma M0 as it is easier to use and is more compatible with modern computers!

Build yourself a buzzing bracelet for subtle haptic feedback as time passes! It's great for reminding yourself to get up and walk away from your desk for a few minutes each hour, or just as a way to have a new awareness of how the perception of passing time varies based on what you're doing.

You'll whip up a vibrating motor circuit using a transistor, resistor, and diode, and use GEMMA to control the frequency of vibration in between low-power microcontroller naps. The circuit lives inside a linked leather/rubber bracelet, but you could build it into whatever you please. This project involves some precision soldering, but is otherwise quite easy!

Before you begin, make sure you've read the following prerequisite guides:

For this project, you will need:

This guide was first published on Jun 10, 2015. It was last updated on Oct 15, 2018. This page (Overview) was last updated on Jul 28, 2018.