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New! October 2013. Version 5 of the code is out with new clock modes and extra functions! Get it while it's hot from Google code, link in the in...
So here's what you need... 2 x Model 2416 Red or Green LED Matrix Displays from Sure Electronics You can get these from Sure's eBay store for $15 e...
This diagram shows how to connect the parts. It's not too difficult, and you can try it on a breadboard first to make sure all is working. When you ar...
The displays use a serial protocol called SPI to receive data. There are only 4 wires needed between the Arduino and the first LED display. Two more...
The DS1307 clock chip keeps the time. It uses the I2C protocol and only needs 2 wires to send time data to the Arduino. Connect pins 5 and 6 from ...
Connect one push button between Arduino pin 2 and GND , the other between Arduino pin 3 and GND.
Connect the 5v and GND lines from the displays to the Arduino’s 5v and GND pins. Do the same for the 5v and GND pins from the DS1307 clock chip. We ar...
The Prototyping boards or ‘shield’ plugs into the Arduino making it easy to add components. On a standard prototyping board you should have room to so...
Here you see everything connected together. The 2 displays plug into the prototyping board which sits on top of the Arduino. Easy!
The last job is to upload the clock code. First you'll need to download the Arduino programming software, called the Arduino 'IDE'. This code was test...
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