matrixNecklace

Index

• Introduction
• Project's Description
• Folders
• Known Issues
• To Do

Introduction

This project is a simple customizable necklace, based on an AtTiny2313a AtTiny48/88 and a 8x8 dot LED matrix.

The very first idea came from furrtek's mind, called jewelmatrix. You can find his project on his website (french).

I wanted to improve the thing and add a few options, like a rechargeable Li-Ion battery (instead of the coin cell furrtek used) and a cross-platform tool to add custom patterns on the fly, without the need to rebuild and flash the attiny every time.

To be implemented features :

• Fully customizable patterns
• Rechargeable by USB

Planned features :

• Easy on-the-fly programmation by any device running *nix, windows, MacOS or android operating system, using the device's screen as the transmission support
• USB connection to host device (faster than screen transmision)

Project's Description

• matrixEditor

  • matrixEditor is the UI for matrixNecklace's patterns creation.
  • Based on the FLTK graphic library.
  • Still at experimental level.

• matrixNecklace

  • AtTiny48/88 AtTiny2313a 8-bits microcontroller
  • 8x8 dot LED matrix
  • Li-Ion battery, which can be recharged via micro USB type B

Folders

• doc/
  • Datasheets
• editor/
  • C++ Cross-platform editor source code
  • Compile script and instructions
• firmware/
  • AVR hardware source code
  • Compile script and instructions
  • Basic patterns (for reference)
  • Arduino sketch used to determinate matrix' pinout
• hardware/
  • schematic/
    • KiCad schematic files (not released yet)
• licenses/
  • Project's license file(s)
  • Every libraries used's specific license file(s)

Known Issues

• 50/60 Hz differences may cause problems for screen transmission upload

To Do

• Documentation

  • Sphinx documentation
  • Compiling HowTo

• Editor

  • Patterns import/export
  • Patterns ordering and timings
  • Integrated compiler (and it's output)
  • Device uploader

• Firmware

  • Correct pinout/registers match
  • Update for AtTiny48/88
  • Create custom bootloader
  • Add USB support

• Hardware

  • Finish pinout
  • Finish chips libraries
  • Release schematics
  • Create BOM
  • Still AtTiny2313a version ?
  • Mini USB type B version ?