There are a thousand ways to skin this cat. Some involve bias voltages
triggering transistors, some would use a A/D converter outputting to a octal
or hex decoder...

Me (a computer engineer),
I would buy the $8.95 kit and be done with it. A little solder, a few tests,
install it, and then it's Miller time. Well, Sierra Nevada Pale Ale time.

tim in san jose

>
>Chris,
>
>I just bought a kit that does what you are describing from Jameco
>Electronics
>(part # 181833) for the not so steep price of $8.95.  You get all of the
>components, including the 7 LEDs (2 red, 2 yellow, 3 green) and can set it
>up
>for 1, 1/2 or 1/4 volt increments around  the 12 VDC center LED indicator.
>It is mounted on a circuit board approx. 1 1/2 X 2 1/2".
>
>www.Jameco.com
>
>Hope this helps.
>
>Roger

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