Editing Using The Big Digit Driver

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The BDD has a 3-wire serial (SPI) interface, with inputs and outputs that can be daisy chained.  The interface was designed with the [http://arduino.cc/  Arduino] platform in mind, and thus has a 6 pin (2x3 DIL) header that matches the SPI (aka ICSP/ISP) header found on most Arduino and other AVR-microcontroller based development boards.  For the purposes of discussion, we will refer to the controller as an "Arduino," however any AVR or other microcontroller with an SPI interface can be used as well.)
 
The BDD has a 3-wire serial (SPI) interface, with inputs and outputs that can be daisy chained.  The interface was designed with the [http://arduino.cc/  Arduino] platform in mind, and thus has a 6 pin (2x3 DIL) header that matches the SPI (aka ICSP/ISP) header found on most Arduino and other AVR-microcontroller based development boards.  For the purposes of discussion, we will refer to the controller as an "Arduino," however any AVR or other microcontroller with an SPI interface can be used as well.)
  
To connect an Arduino to a BDD, use a [http://shop.evilmadscientist.com/productsmenu/partsmenu/534-6pin3inch suitable cable] to connect the SPI header on the Arduino to the SPI input header on the BDD.  Ensure that you have the ribbon cable polarity is correct:  Pin 1 of the ribbon cable is usually marked with a red stripe on one side, and a little arrow on the connector.  On the BDD, pin 1 of both SPI headers is marked with a large triangle.  On the Arduino side, pin 1 of the 6-pin connector may be marked with a stripe, the number "1" or another indication of polarity.
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To connect an Arduino to a BDD, use a [http://shop.evilmadscientist.com/productsmenu/partsmenu/175-6pinisp suitable cable] to connect the SPI header on the Arduino to the SPI input header on the BDD.  Ensure that you have the ribbon cable polarity is correct:  Pin 1 of the ribbon cable is usually marked with a red stripe on one side, and a little arrow on the connector.  On the BDD, pin 1 of both SPI headers is marked with a large triangle.  On the Arduino side, pin 1 of the 6-pin connector may be marked with a stripe, the number "1" or another indication of polarity.
  
  

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