Date:         Mon, 30 Sep 2002 23:56:31 -0400
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: Red light flashing
Comments: To: George Averill <averill@ldl.net>
In-Reply-To:  <002701c268f7$4d1619a0$6fc5c2d1@averill>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 11:04 PM 9/30/2002, George Averill wrote:
>Do you know a good source of a reliable replacement temp. gage?  Seems like
>all of the ones on the shelf since 84 are the same age and all will have old
>components in them.
>
>Mine doesn't blink at all any more.

No, sorry.  If you're dead in the water I could probably take a look at it
for you.  Can't help if it's the chip though, that's custom I'm pretty sure.

Maybe we should start thinking about an auxiliary blinker.  Basically the
same as a low-fuel blinker -- could make a combined unit.  Interesting
notion.  The coolant light would have to latch, since the newer controllers
don't send a continuous signal like the older ones.  Hmmm...the output of
the controller could probably drive a blinker directly, the old one is an
open-collector with a zener diode to limit it to ?2.5? volts or so and the
new one has to be similar since it's forcing the gauge output and therefore
has to be strong.   I'll see what kind of waveform the output is -- has to
be some low-duty-cycle pulse to keep the gauge reading from rising noticeably.

david


--
David Beierl - Providence, RI
  http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage"
'85 GL "Poor Relation"