[Gmecm] Shift light load
Rob Handley
Robin
Sat May 5 14:42:25 UTC 2007
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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