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Re: [N8VEM-S100:1105] dual IDE card

The displays are designed to run at 5V, there is just NO need for a
diode...Yes, they do get warm, but thats the way they work.... and
yes, they are bright.

If you want to use a diode to run them a bit cooler, use a 1N5817 -
1N5819 Schottky Barrier Rectifier or equiv... rated at 1 amp and a
drop of .4v, should work just fine.... but a jumper is just fine.


On Wed, Sep 5, 2012 at 10:10 AM,  <norwe...@aol.com> wrote:
>>> Hi!  Try a diode with a lower forward voltage drop like a Schottky or
>>> Germanium diode.
>>> It must be able to carry 1A current though.  A Si diode will drop 0.7V
>>> which may be
>>> pushing your TIL311’s too low.
> I tried all kinds of diodes, including a germanium.  None seemed to supply
> enough power (the displays showed "-").  The polarity was fine.  A wire
> jumper did the trick, and the digits aren't too bright or "hot".  Both 5v
> regulators on the card remain cool when it is in use.  I will probably pull
> the TIL311's anyway, after all the check-out.  They are quite visible when
> the card is in an extender, but what good will they be when the card is down
> in the card cage?

~~ _/) ~~~~ _/) ~~~~ _/) ~~~~ _/) ~~

Tom Lafleur
(858) 759-9692