Datasheet

When you buy a pack from Adafruit, it comes with the
fully tested and assembled backpack as well as a 8x8
matrix. You'll need to solder the matrix onto the
backpack but its an easy task.
Remove the parts from packaging and place the LED
matrix OVER the silkscreen side.
The matrix must be soldered on the correct orientation
or it will not work! Check for the side of the matrix that
has printing on it. Then look for the front of the PCB
that has a circle instead of a square in the corner and
line those up as shown on the left
Do not solder the matrix over the chip on the back of
the backpack - it will not work then!
© Adafruit Industries https://learn.adafruit.com/adafruit-led-backpack Page 43 of 74