Battery level indicator - Tri-colour?

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Jason S wrote:

You mean like this one from Jaycar

<http://www1.jaycar.com.au/productView.asp?ID=KA1683&CATID=&keywords=&SPECIAL=&form=KEYWORD&ProdCodeOnly=yes&Keyword1=K&Keyword2=K&pageNumber=&priceMin=&priceMax=&SUBCATID=

Kevin Martin

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<http://www1.jaycar.com.au/productView.asp?ID=KA1683&CATID=&keywords=&SPECIAL=&form=KEYWORD&ProdCodeOnly=yes&Keyword1=K&Keyword2=K&pageNumber=&priceMin=&priceMax=&SUBCATID=


hmmm, no, I'd rather not have 10 LED's.  A tri-colour would be nice, or just
a green, yellow and red LED.  I'm sure it's possible.  But thanks anyway. =)

to
normal
wondering
luck

For three colours you only need two leds, consider what happens when both
are on.

Search for "window detectors".

How about something like this.  I will set something up for a car battery.
To make up some numbers say one detector(A) turns on below 12 V.  The
other(B) turns off below 10V.
Now with a bicoloured led hook A to the red led, B to the Green.

Batt V   DetectA Detect B Colours
9                  ON     OFF       RED
11                ON     ON         RED + GREEN= AMBER?
13                OFF   ON         GREEN

I know that the problem with this system is that Green now becomes the
colour for overvolt, but it gives you a start.

HTH

Mike

Umm ok, that sounds like a start I suppose.  I'll check it out later on.
Thanks =)

Jaycar have an RGB led for $5.95 (ZD-0270).
You could also use a bi-colour led. Use the green and red for the normal and
high functions, then oscillate the signal to the led to create amber for the low
indicator.

Thanks. I'll take that into consideration, as I've read that a 3-pin package
is not as common as the 2-pin.  Easier to install on a PCB also.  Now all i
need is a good battery level circuit that will control it for me!  I'm
looking for a schematic as I want to be able to twink with the
components/operation. Like I want to be able to control the low, normal and
high voltages with precision, if possible.  e.g. 13.6V.