One of the Arduino components that have greatly intrigued me is the 8×8 LED Matrix. It lets you control 64 LEDs with just 16 pins, meaning we have to go through a pretty interesting thought process to ensure that the display shows what we intend.
In this video, we will delve into how the matrix works, including the type of logic we have to use to correctly light each pixel, as well as how to set up resistors so we don’t cause damage to our LEDs.
NOTE: The calculation at 11:57 shows that we exceed the maximum current draw of one pin on the Arduino. Luckily, in reality that doesn’t seem to be what happens. For more information, please check out the pinned comment. Many thanks to user “mangostain” for their effort to take the measurements and to share it with us!
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