On Tue, Feb 9, 2010 at 7:19 PM, Isaac Marino Bavaresco wrote: > Em 9/2/2010 16:59, William "Chops" Westfield escreveu: >> >>> visual perception >>> >> I dunno. =A0Isn't the usual manifestation that multiplexed and/or >> charlieplexed LED displays don't seem nearly as dim as they ought to >> be, given their actual on-time. =A0I've seen 3 or 4 digit displays and >> done 20-led dot-matricies that light one segment or LED at a time, and >> they certainly don't look ~1/20th the of the "normal rated current" >> brightness of the individual LEDs... >> >> BillW >> > > > Perhaps that's because most human senses aren't linear, but rather > logarithmic such as hearing. > This may be the case of sight also. It is indeed. If you ran those LEDs with the same average power, but a steady current they would appear brighter. Chris -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist