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Old 27th September 2006, 01:54 AM   #1
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Default LED types for simple indicator lights

What size/type/package LEDs can be suggested for a front panel display (LEDs for simple functions like power indication, warning lights, etc.)?

I'm trying to get something a little smaller than the standard 3mm (because I want the lights subtle, not really noticeable), but I don't know what all of the packages are in the listing on digikey (gull-wing, rectangular, T-3/4, etc.).
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Old 27th September 2006, 04:54 AM   #2
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If you want really tiny, you can drill a hole in the front of an LED and epoxy in a plastic fiber optic strand. Coupling efficiency may not be too great, but you'll get a tiny light.
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Old 27th September 2006, 03:03 PM   #3
cpemma is offline cpemma  United Kingdom
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Default Re: LED types for simple indicator lights

Quote:
Originally posted by rtarbell
I'm trying to get something a little smaller than the standard 3mm...
There are some wire-ended usually known as "lighthouse" LEDs, flat-topped and come in 2mm, others 1.8mm with a rounded front around.

"Gull-wing" are one of the surface-mount packages, going that route the smallest LEDs easily available (AFAIK) are a 0.2mm lens in a 1.5mm x 1.0mm x 0.5mm package, but maybe harder to panel-mount.

As said, you can drill a shallow hole in a 3mm LED and glue in some fibre-optic strand, make your own mini-lighthouse. Superglue maybe better than poxy resin.
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Old 27th September 2006, 07:30 PM   #4
AndrewT is offline AndrewT  Scotland
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Hi,
another thread showed machined LED lenses of various shapes.

You could machine a normal 3mm LED to any sensible size between 1mm and 3mm using his method.
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Old 3rd October 2006, 06:06 PM   #5
lgreen is offline lgreen  United States
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Quote:
Originally posted by AndrewT
Hi,
another thread showed machined LED lenses of various shapes.

You could machine a normal 3mm LED to any sensible size between 1mm and 3mm using his method.
Yes, try taking a file to a normal size LED, surprisingly you can remove a lot of the outer glass/plastic to make it have a smaller point before wrecking the LED.
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Old 3rd October 2006, 11:21 PM   #6
cpemma is offline cpemma  United Kingdom
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Another way to make the light more subtle is to really reduce the LED forward current; think 0.2mA rather than 20mA.
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