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General • Re: Testing high forward voltage 5mm LEDs on Pico digital pins (long post)

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Really? Do you have a link to the article, because that sounds bogus. Even if it isn't bogus I wouldn't suggest that it is "always recommended".

You might be getting confused with multiplexed displays, where each LED is turned on for a fraction of the refresh cycle, but at a much higher current to compensate for the fact that it's only on for a short time. Persistence of vision makes the eye see a less bright LED which is on for the whole time.
Yes, perhaps not always recommended. I read it below

https://www.electronics-tutorials.ws/diode/diode_8.html
So pulses at a frequency of 100Hz or more actually appear brighter to the eye than a continuous light of the same average intensity.
It seems that applies when you increase the LED current (which will make the LED brighter) but use PWM to keep the total power dissipation within the LED's limit. Which is not what you said.
Well, I guess I misunderstood. It seemed like if you could use a PWM and get the same brightness, why not? That was my line of logic to myself, but I can be wrong. ;)

Statistics: Posted by breaker — Sun Dec 29, 2024 5:19 pm



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