In a dot led matrix display, multiple LEDs are connected together in row and columns. This connection is established to reduce the number of pins needed to manipulate them.
In the current article we will use a 8x8 LED matrix, which would require 64-pin I/O, one for each pixel.
Connecting all the anodes together (from R1 to R8) and cathodes in column (from C1 to C8), the required number of I/O pins, is reduced to 16. Each LED is accessed by its row and column number....read more
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