[Gmecm] Shift light load

[JohnsHome]

LEDs work nice on a quad output when used with the right resistor.
The only thing is that the leakage current will keep the LED dimly lit.
Not a big deal but you may want to fiddle with resistors to get the best
dim/bright settings.
John

> -----Original Message-----
> From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org]On
> Behalf Of Rob Handley
> Sent: Saturday, May 05, 2007 9:42 AM
> To: gmecm at diy-efi.org
> Subject: Re: [Gmecm] Shift light load
>
>
> Thanks Scott.
>
> I'm going to a car show tomorrow - so shall have a look out for
> ultra bright
> LED fittings.
>
> Robin
>
> ----- Original Message -----
> From: "Scott Peitzsch" <jlg-sep at comcast.net>
> To: <gmecm at diy-efi.org>
> Sent: 03 May 2007 21:47
> Subject: Re: [Gmecm] Shift light load
>
>
> >A typical dash indicator bulb - shift light or otherwise - is going to be
> > either a 194 or a 168, which will consume 0.27 - 0.35A.  The other
> > typical device those quad driver outputs control are vacuum solenoids
> > and relays, which generally check in around 60 ohms (at least the few
> > I have here to measure), which is a sinking load of ~200mA.
> >
> > If I had to guess, I'd say those drivers have to be good for sinking
> > at least an amp.  However, I'd probably consider using a relay much
> > above 500mA just to be conservative.
> >
> > Have you looked into any of the ultra bright LEDs?  You can get the
> > brightness you want without the penalty of hugely increased current
> > consumption.  In fact, you'd probably end up drawing LESS than you
> > do today.  I've used these in the past:
> >
> > http://www.autolumination.com/
> >
> > -Scott
> >
> >
> >> Anybody know what load can be put on the shift light pin of a '727?
> >>
> >> I'm using a small dash light ATM, but it's not wonderfully
> visible so I
> >> was thinking of fitting something bigger and higher wattage -
> as long as
> >> it doesn't fry the ECM!
> >>
> >> Robin
> >
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