At 11:02 AM 1/18/2005 -0800, you wrote:
>Hi Bill:
>
>For years I've been searching the Jameco catalog for low current LEDs, and 
>in Catalog 244 they are stocking units speced for 1 and 2 ma.  I have 
>tried using other LEDs at reduced current and so far all of them have shut 
>off at the 2 ma level (or they are so dim by comparison to a "true" 2 ma 
>LED that it's the same as being off).
>These are all rated at 1 or 2 ma:
>Jameco #        p/n
>253690CR        HLMP-1700
>253729CR        HLMP-K150
>253681CR        HLMP-1790
>253673CR        HLMP-1719
>253817CR        HLMP-4700
>253850CR        HLMP-D150
>253833CR        HLMP-4740
>253825CR        HLMP-4719
>
>
>My guess is that Jameco got a good deal on a remainder lot.  It's too bad 
>these are not being made any more because for battery powered devices the 
>low current LEDs are the way to go.

They've been eclipsed by superbright LEDs. Vf is a bit higher, but a 13,500
mcd green LED (@20mA) is quite bright (just not blinding) at 2mA.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com




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