by ex99125b » Wed Aug 10, 2011 12:43 pm
specifically, if I use a seven segment ( 1") display with a max current of 105 ma per segment, and drive each segment with, say 100 ma, using a 5 v supply, I can throw 50 ohm resistors on the outputs of a dip switch and get my result....right?
But then the display Im looking at HDSP-3900, while spec'ed at 105 ma Avg. Pwr per Seg. and 40 ma. Max DC forward Current per segment. I am confused.
Which do I use? since I will be driving it at DC (no pulse) am I correct in assuming that the Max forward current takes into consideration the extra heat generated at DC and therefore I should go with 40?