Heath site help

[Alan KB7MBI]

I was at a Heath site a few nites ago and on that site was a circuit for
indicating when a battery gets to a certain threashhold value. it had a pot
in the circuit to adjust at what level the light would come on. For the life
of me I can't find it again (grrrrr). Would any of you might know the Heath
site?  Thanks--Alan KB7MBI

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