Matrix Clock

Introduction

The Matrix clock is a single board, highly compact, Arduino compatible clock that displays the time on an LED matrix display. The display and rich firmware library allow for animated transitions between minutes.

Based on the Arduino Leonardo, the Matrix Clock is fully compatible with the Arduino IDE and can be easily updated or customised with new sketches, uploaded via a USB Micro cable. A coin cell powered Real Time Clock Calendar keeps track of the time and date when the unit is not powered. The Matrix Clock can also play musical alarms that can be easily reprogrammed with different tunes. Due to its compact form factor the Matrix clock could be fitted in any number of housings - even a pocket watch style housing. If portability is desirable then the unit can be battery powered and a sleep function is available (by taking one of the expansion pins to ground) in order to extend battery life.

Features


  • 16x8 LED Matrix display
  • ATMEGA32U4 microcontroller
  • Coin cell powered Real Time Clock Calendar
  • Texas Instruments TLC5920 LED driver
  • 4 Buttons
  • Piezo speaker output
  • Sleep mode input
  • 2 power inputs, USB Micro connector or 6V - 9V DC in. (Normal powered by Vin switches when USB power is present).

Instructions


Specifications

Microcontroller Atmel ATmega32u4 in TQFP-44 package
Operating Voltage 5V USB powered or 6V to 9V
Power and communications USB Micro B
Current Approx 90mA average during normal operation Max. 300mA
LED Matrix 2x 8x8 3mm green LEDs
Clock speed Microcontroler 16MHz, RTCC 32.7
SRAM 2.5 KB
EEPROM 1 KB
Flash Memory 32 KB
Expansion Header Gnd, Vin, 5V, Sleep, Piezo-, Pezo+

Schematic


PCB


Licensing

http://i.creativecommons.org/l/by-sa/4.0/88x31.png

Matrix Clock V1 by Dan Hamer is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License

Help us make it better

Thank you for choosing Seeed. A couple of months ago we initiated a project to improve our documentation system. What you are looking at now is the first edition of the new documentation system. Comparing to the old one, here is the progresses that we made:

  • Replaced the old documentation system with a new one that was developed from Mkdocs, a more widely used and cooler tool to develop documentation system.
  • Integrated the documentation system with our official website, now you can go to Bazaar and other section like Forum and Community more conveniently.
  • Reviewed and rewrote documents for hundreds of products for the system’s first edition, and will continue migrate documents from old wiki to the new one.

An easy-to-use instruction is as important as the product itself. We are expecting this new system will improve your experience when using Seeed’s products. However since this is the first edition, there are still many things need to improve, if you have any suggestions or findings, you are most welcome to submit the amended version as our contributor or give us suggestions in the survey below, Please don’t forget to leave your email address so that we can reply.

Happy hacking