31 Oct
2011
31 Oct
'11
3:17 p.m.
Joke-a-side.. If multiplexing really did save power
then just pulsing a
single led would do the same..
Multiplexing of LED displays was intially done, I think, to save
connections. If you think of an 8-digit calculator display (with 7
segmets + a decimal point per digit), that's 64 LEDs, so 64 conenctions
to the display (+ a common return). If you multiplex it, that's 16
connetions, 8 for the segments (one for the top, one ofthe top right
vertical, etc) and 8 to select the digits (one per dgiti).
-tony