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All of the major components for the amulet.
In north-east-south-west order they are:
– case lid,
– case (with battery, power switch, charge controller, and directional switch),
– jewel (controller cover), and
– microcontroller with LED ring.

 

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The components above assembled into the amulet. The green light is the power LED on the Adafruit Gemma. The amulet is also designed to support Adafruit Flora boards.

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Side view showing (from left to right) the 5-way directional switch (north, east, south, west, plus center press), the main power switch, and the micro USB charge controller input.

 

There are still design tweaks needed around the power switch and maybe the jewel but I think this part of the project is approaching a viable state. After this comes programming the UI (How can a RGB pixel ring and a D-pad be used most effectively?) and after that comes programming the spells (Light, Rainbow, Party, speficic LED Patterns, etc.). At that point, we’ll have a level one amulet ready for release.

This amulet is being designed as step one of a platform rather than a purely frivolous trinket. A larger jewel or otherwise modified case could support additional sensors or displays. Maybe a belt buckle or bracer accessory would be more suitable for certain applications. Maybe a tiny epaper screen inside your hoodie’s hood?

Now that we’re all walking around with computers in our pockets, general-purpose wearable computing seems less like a distant potential future and more like the recent past.