WHITE LED''s lenght
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Posts: 46,084
How long do those things last?
I might just be stupid, but I heard, or thought I heard those lights
burn out. If not, how long do they burn out at higher Volts?
Original Message
From: Gerry Shand/Corrinne Bergen [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=mmwCS3CjuWNXIMgzIpj5qj1van2RIYSvBMwmAmCtz5g4lneDIIx1ootkJ279Q3Mx41qoGnRrWet4]res@c...[/url
Sent: Saturday, August 03, 2002 10:53 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re: WHITE LED's
My two cents on this issue (please ignore if already said as I am
joining
this string a bit late). I got my white LED's from Digi-Key for about
$2.40
each (okay, I bought in small lots so the price is higher - d'oh!) but
the
MCD output is 3000 at Vf = 3.75V with an If = 20mA and they do leave
spots
in your eyes. If you up the voltage by 20%, the current almost doubles
and
the light intensity really takes off! I do not know how long you can run
the
LED at the high end before the junction dies of heat exhaustion. Neat
stuff.
Other suppliers: www.nichia.com and www.theledlight.com
These guys have different colors available too. Red, orange, green and
blue.
Groovy man.
It appears from what I have seen is that these LED's are probably made
at
the same plant in Japan and are then distributed by more than one
company in
North America. If different plants are manufacturing these items, I
would be
willing to bet the dies for the LED's are either identical or pretty
darn
close (clone) to each other. If this is wrong, please let me know.
> Beats me, but the surplus superbright red LED's I bought at Tanners in
> Dallas are nasty -- at about 30 mils they are too bright to look at. I
think
> they were 5-6,000 mcd. Can't imagine anything brighter.
>
> I did notice that superbrightleds.com appears to be the OEM
manufacturer
of
> some LED micro lights that sell for $12-15 in stores -- their price is
$3.
> Might have to try a few.
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I might just be stupid, but I heard, or thought I heard those lights
burn out. If not, how long do they burn out at higher Volts?
Original Message
From: Gerry Shand/Corrinne Bergen [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=mmwCS3CjuWNXIMgzIpj5qj1van2RIYSvBMwmAmCtz5g4lneDIIx1ootkJ279Q3Mx41qoGnRrWet4]res@c...[/url
Sent: Saturday, August 03, 2002 10:53 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re: WHITE LED's
My two cents on this issue (please ignore if already said as I am
joining
this string a bit late). I got my white LED's from Digi-Key for about
$2.40
each (okay, I bought in small lots so the price is higher - d'oh!) but
the
MCD output is 3000 at Vf = 3.75V with an If = 20mA and they do leave
spots
in your eyes. If you up the voltage by 20%, the current almost doubles
and
the light intensity really takes off! I do not know how long you can run
the
LED at the high end before the junction dies of heat exhaustion. Neat
stuff.
Other suppliers: www.nichia.com and www.theledlight.com
These guys have different colors available too. Red, orange, green and
blue.
Groovy man.
It appears from what I have seen is that these LED's are probably made
at
the same plant in Japan and are then distributed by more than one
company in
North America. If different plants are manufacturing these items, I
would be
willing to bet the dies for the LED's are either identical or pretty
darn
close (clone) to each other. If this is wrong, please let me know.
> Beats me, but the surplus superbright red LED's I bought at Tanners in
> Dallas are nasty -- at about 30 mils they are too bright to look at. I
think
> they were 5-6,000 mcd. Can't imagine anything brighter.
>
> I did notice that superbrightleds.com appears to be the OEM
manufacturer
of
> some LED micro lights that sell for $12-15 in stores -- their price is
$3.
> Might have to try a few.
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from the same email address that you subscribed. Text in the Subject
and Body of the message will be ignored.
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http://docs.yahoo.com/info/terms/