Marcus: “This project started when I printed Diagrid Bracelet by nervoussystem and got the idea to add some LEDs to it. I later change the design to be a solid half circle that locks really nice when the LEDs lighten it up. A adafruit trinket (Attiny85) is controlling a Neopixel 144 LED/m strip and reading value from a FLORA Accelerometer/Compass Sensor (LSM303) using I2C.”
To get the bracelet to interact with the environment I added an 3-axis accelerometer for catching the wearers movements.
The bracelet will cycle throw the color wheal slow and if get shaken it hop a few colours and if shaken for longer time it start to sparkel. It will run for about 3 and a half hour on a charge.
To get the code to work and fit on the trinket/gemma I had to rewrite Adafruit LSM303 library to use TinyWireM and int32_t instead of float to save space, I also remove the compass part of the library. The Arduino sketch is 5,214 bytes of a 5,310 byte maximum.
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