A classical design for directlydriving eight seven-segment LEDdisplays requires as many as 15 I/O lines.Previous Design Ideas have describedmany approaches for using a maximumnumber of LEDs with a ...
The MAX7221 is a compact, serial input/output common-cathode display driver that interface microprocessors (µPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 ...