The scenario
Circuit diagram for driving a 16x16 bi-color LED matrix with a MAX7219 display driver controlled by an Arduino Nano over SPI.
What is in this drawing
Read the decisions behind it.
01
SPI control pins DIN, CLK, CS connected between Arduino and MAX7219
02
ISET resistor sets LED current
03
Decoupling capacitor stabilizes 5V supply
Use when wiring an Arduino Nano to a MAX7219-based LED matrix display, including power and current-setting components.
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