SparkFun LED Array (8x7) Hookup Guide
Contributors:
Shawn Hymel
Shawn Hymel 
Introduction
The LED Array (8x7) is a set of 56 LEDs arranged in a nice 8x7 grid. It relies on Charlieplexing to control individual LEDs, which means less GPIO pins are used (as opposed to a traditional grid format). This guide will walk you through connecting the LED array and using some code examples to make those LEDs light up. We even wrote a library to help you display some simple graphics and scrolling text!
IMPORTANT: For the time being, the library for this board only supports ATmega 168 and 328-based Arduinos (e.g. UNO, RedBoard, Pro, Pro Mini, etc.). You can still use the LED Array board with other platforms, just not the library.
SparkFun LED Array - 8x7
COM-13795Required Materials
To follow along with this guide, you will need the following additional parts:
Suggested Reading
If any of these subjects sound unfamiliar, considering reading the following tutorials before continuing on.
- What is an Arduino?
- Installing the Arduino IDE
- Installing an Arduino Library
- How to Use a Breadboard
- How to Solder - Through-hole Soldering