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

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Lets go:
  • Low side high voltage.
  • Ground plane.
  • LED brightness is a function of a couple things.
  • The heat on that GPIO driver could be large!
  • Constant current drivers find the balance point for you!
  • There is the digital way and there is the analog way. (Power supply may care.)
  • There are dynamic forces which create hell. (Avoid them as most people are required to do.)
  • Some datasheets will report the pulse current, which is safe according to some undocumented metric.
  • We are not given pspice simulations! (Manufacturing this good would likely be in the USA or Europe. For china, always use statics.)
  • We rarely get wavelength information or yield data. (Again we can sort this out, but its usually not worth it.)
    • The cheaper way to do it is software with reliable PCB.
    • Chemical properties like temperature change everything, which makes life hell.
    • Please give me the name of the professional who does not know this and talks smack. (They have business to discuss.)
Text to speech is a funny joke, like a born again virgin. So my sympathy for the patience this must have taken.

Now lets see how do you know the contrast of a LED? Now be nice and learn to yield. Probably in always! Know what I mean, learn a better way. Pros work by the hour all around the clock. Trust your neighbor, but your name is Jones. Follow that way and worry not you'll get there.

Statistics: Posted by dthacher — Sun Dec 29, 2024 3:02 pm



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