different types of LEDs!

Started by gutsofgold, November 05, 2007, 06:53:02 PM

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gutsofgold

i'm building an active a/b/y box and it's using two leds to indicate which position is present. (one for a, one for b, and both on at y).

small bear has a few different 5mm leds available...diffused, clear tint, and water-clear high brightness.

which type would you recommend? i'm not looking to blind anybody but i'd like it to be semi-visible in light environments.

gutsofgold

I'll just buy a lot and see what they're all about.

axg20202

I prefer to use diffused, but that's just my taste. I find that sometimes it can be difficult to see if a water clear LED is on or off unless viewed directly from above.

Mark Hammer

That's just it.  You pick the LED type based on usage context.  If it needs to be viewed from a variety of angles and distances, diffuse is best (though you can always buff the plastic dome with sandpaper to make a clear one more diffuse).

High brightness or "superbright" LEDs (which I would say is anything with a rating over 2000mcd, although they can get much brighter than that) have the advantage of being able to provide the same brightness as a more conventional type with lower current draw (assuming you stick in a larger-value current-limiting resistor like 10-15k).  If you are powering everything from a wallwart, that extra few milliamps won't make any difference, but if you would like to have a 9v battery last a while longer superbrights provide an advantage.

As broad and reasonably-priced an inventory as Steve has, and as much as I like him and enjoy dealing with Small Bear, this may be one of those instances where it is wiser to go to a local electronics distrobuter and see what they have on their shelves so you can compare brightnesses, size, color, and anything else that might make your unit more usable for you.

I know folks like the mounting bezels for their look.  It is quite possible, however to simply pop a snug hole in the top of a Hammond box, let the "head" of the LED just poke through, and achieve good visibility from a distance and many angles.