On Feb 6, 2006, at 9:03 AM, Bob Axtell wrote:

> identified the 1N4148 across a telecom relay as the primary problem.

I always thought signal diodes were a little fragile in this
application, and tend toward 1n400x rectifiers instead.  But
based on your first message, if speed is an issue, they might
be worse.  But if the diodes blew in that design, that's not
a diode speed issue, is it?  And are the protection diodes in
something like a ULN2003 that much faster than discreet diodes,
or are they just useless marketing ploys?

Sigh.  I though I knew what I was doing, and now I'm all confused!

BillW

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