Mr RB
Well-Known Member
If you flash a LED at 100 hz it appear to be be constantly lit up, as it's above the frequency response of the human eye or optic nerve or whatever. Your senses are not fast enough to see the flashing.
But if you flash 4 LED displays, ie 4 digits in a 25% duty standard digit multiplex, and each one is flashing at exactly 100 Hz and 25% duty cycle (which is above the human ability to see) then why can you see very clearly that the whole 4 digit display is flashing??
I have my own theory, but I'd really like to hear other people's theories.
But if you flash 4 LED displays, ie 4 digits in a 25% duty standard digit multiplex, and each one is flashing at exactly 100 Hz and 25% duty cycle (which is above the human ability to see) then why can you see very clearly that the whole 4 digit display is flashing??
I have my own theory, but I'd really like to hear other people's theories.