Highest speed for normal LEDs

Status
Not open for further replies.

MahmoudHassan

Full Member level 6
Joined
Oct 4, 2010
Messages
349
Helped
44
Reputation
90
Reaction score
40
Trophy points
1,328
Activity points
3,919
Hi All
wish you the best
I am planning to work in circuit that will switch output across normal LED , but I am confused about the highest speed the LED can work at so that my eye can detect change in light emitted by the LED ?

Thanks a lot , your help is really appreciated

Best Regards,
Mahmoud
 

The LED, any LED, will be way way way faster than your human
persistence-of-vision. You can't really make out 120Hz flicker.
LEDs can follow hundreds of MHz to multi-GHz depending on
type and so on.

It's not a LED problem.
 
Mahmoud,
audioguru probably means that if a LED is switched on for a single pulse of 30ms or longer you will be able to see it, I agree with that.

Audioguru said:
Pulse Width Modulation (PWM) is used to dim an LED. If the duration of flashes is less than 30ms then the LED will appear dimmer.
Click to expand...
audioguru, this will be a good test to do on a simulator.
 
Last edited:
Vbase said:
Mahmoud,
audioguru probably means that if a LED is switched on for a single pulse of 30ms or longer you will be able to see it, I agree with that.
audioguru, this will be a good test to do on a simulator.
Click to expand...
It is a standard dimmer system. It is also used for DC motor speed control.
 
Thanks a lot really helpful for me
Thanks a lot
God bless your efforts
really appreciated
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…