1 How to Multiplex an LED Grid...
An explanation of multiplexing LEDs in rows and columns to save pins, linked for both plain and RGB LEDs and for how the diodes keep unwanted ones dark.
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An explanation of multiplexing LEDs in rows and columns to save pins, linked for both plain and RGB LEDs and for how the diodes keep unwanted ones dark.
A GreatScott introduction to multiplexing LEDs, linked whenever someone wants to drive many LEDs from a few microcontroller pins.