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want to display 1,2,3,4 on four seven segemnt display connected to 8051 in such way that the display reads as "1234", but I am not able to write delay routine which refreshes the displays fast enough that our eyes is not able to catch it, kindly guide. using 12Mhz crystal.
Some people are more sensitive to flicker than others.
125Hz sounds a bit low to me, considering that many people complain of flicker from standard fluorescent lamps - which is 100Hz over here.
Erik has much experience in this area...
Personally, I find that I see the flicker in lots of the LED exterior lamps used on cars mowadays. It's not so much when I look directly at them, but when they cross my field of view...
125Hz sounds a bit low to me, considering that many people complain of flicker from standard fluorescent lamps - which is 100Hz over here. I once had a bunch of people looking at a 24*132 LED sign. all saw flicker at 75Hz some saw flicker at 100HZ none saw flicker at 120Hz
Erik