Re: Fuel warning light delay
- From: kensmith@xxxxxxxxxxxxxxx (Ken Smith)
- Date: Fri, 7 Apr 2006 13:55:38 +0000 (UTC)
In article <pan.2006.04.06.19.12.59.326852@xxxxxxxxxxx>,
Rich Grise <richgrise@xxxxxxxxxxx> wrote:
[....]
Not a whole hell of a lot - it took some digging, but I finally found:
http://ww1.microchip.com/downloads/en/DeviceDoc/31030a.pdf
Where it says Voh == Vdd - 0.7 @ -3 mA. And they can't sink much
either, Vol == 0.6 @ 8.5 mA.
That is enough to bias on a transistor that runs an LED but not really
enough to run an LED directly. This seems like a mistake by microchip.
I'd have expected at least a strong pull down.
One nice thing is that the PIC does run on 5V so you have enough swing for
a MOSFET.
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