At 10:11 AM 8/25/2003 -0700, you wrote:
>Hi,
>
>The problem here is not, "can segments be blown?"  The question is
>whether or not it is possible to blow segments without destroying other
>display segments.  As this is a multiplexed array, other segments (ones
>which you do not want to destroy) will be reverse biased, through some
>forward biased segments, once the initial segment is (presumably) burned
>open.
>
>The two manufacturers I just checked (Panasonic and Chicago Miniature)
>list LED reverse breakdown voltages ranging from 3V to 5V.  This matches
>well with my experience.  LEDs do not tolerate reverse breakdown well.

FWIW, the red ones we have break down typically at >30 VDC (as high as my
bench supply goes), even though they are spec'd at only 5V.

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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