adafruit_support wrote:We do have a "backpack" driver specifically designed for driving an 8x8 LED matrix. https://www.adafruit.com/products/870 This is the simplest way and does not require any additional parts.
adafruit_support wrote:The matrix connections will depend on the specific matrix you are using. The PCA9685 outputs can drive up to 25mA. If you need more than that you will require external drivers. Wiring details (with and without drivers) are on page 28 of the data sheet: http://www.adafruit.com/datasheets/PCA9685.pdf For detail on how to select current limiting resistors, there is Ladyada's LED tutorial here: http://www.ladyada.net/learn/arduino/LEDs.html
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