This project was undertaken as I was applying for Intel's "Make it Wearable" contest (https://makeit.intel.com/).
Trailer of that contest:
Although I did not win I decided to try to build my idea. While the idea is not so simple here it is summarized [also see video]: a wearable device that has embedded sensors to monitor your environment and give you feedback/information on certain parameters and most prominently the quality of air and water.
This is only step one: designing a simple bracelet that displays the status of anything with embedded LEDs in a nice light diffusing 3D printed casing. Hopefully later down the road I'll be able to achieve the final goal as described in the BLU video.
Step 1: The Casing
The original design is the white 3D printed bracelet - it was too fragile and turned out quite ugly...
The second try; a much simpler design worked quite well. Simple arcs with a hollow portion in the middle. There is the main body and the cover. The design is very solid, and diffuses the light. It may not look super classy - but it ain't too bad either!
Step 2: Light Diffusion
To have a nice and diffused light I utilized a few different tricks:
- I used Suguru (http://www.adafruit.com/products/436). A little dab of white suguru on each LED and the light was much "softer".
- I put a layer of white paper inside the walls of the bracelet and transparent (opaque) tape on the paper.
Step 3: The Electronics
The electronics are very simple:
- Arduino Gemma ( http://www.adafruit.com/gemma ) [although any mini Arduino will do!]
- Lithium cell battery
- 3 or more Neopixels (http://www.adafruit.com/products/1260)
And they all nicely fit into the casing!
For the battery, any battery should do... but I have a preference for lithium as they are small, hold a decent charge, are easy to get and have the ability to be recharged.