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#Micro Word Clock v2

##Description A tiny replica of the famous Word Clock, using only an ATmega microcontroller, a DS1307 Real Time Clock and a few passive components to display the time on an 8x8 LED matrix. The letters have been printed onto a transparent sheet and glued over the LEDs to produce a readable time. See the YouTube video here.

##Directory structure

• MicroWordClock2-Arduino contains the firmware, including pin definitions for the LED matrix and location of the words in each language.
• EAGLE contains the schematic and PCB design files for the proejct.
• Graphics contains the design for the transparency sheet to place over the LED matrix to form the words, designed in Inkscape. Contributions in more languages are welcome!

##Bill of Materials

You will require an In-System Programmer (ISP) to write the firmware onto the microcontroller.

##Burning the bootloader and uploading the sketch Please read these two tutorials if you are unfamiliar with burning a bootloader:

• http://arduino.cc/en/Tutorial/ArduinoISP
• http://arduino.cc/en/Tutorial/ArduinoToBreadboard

The required procedure is the one described as "AVR on a breadboard" and "Minimal circuit", respectively, as there is no external crystal attached to the microcontroller.

Please download Carlos Rodrigues' Barebones ATmega Chips board configuration file: https://github.com/carlosefr/atmega (instructions inside)

The ICSP header on the Micro Word Clock PCB is the standard layout described here (Fig. 2).

##Contributions Carl Monk has built his own version using a Unicorn HAT.

quistoph has made a Dutch layout.

Tanguy Rewers independently came up with an alternative Dutch layout (labeled as dutch2).

##Featured on

• Hackaday
• Gizmodo
• The Atmel Blog

##License This project (both software and hardware) is published under a Creative Commons BY-SA 3.0 License.