I"ve got a smal RV with two 6 volt batteries; per the manufacturer there is a relationship between voltage and % charged:
100 6.37 90 6.31 80 6.25 70 6.19 60 6.12 50 6.05 40 5.98 30 5.91 20 5.83 10 5.75I would like to build an LED indicator of charge. During charging, the voltage would be a good bit higher, probably close to 7 volts (13.8/2???)
I found this little guy which looks like the ticket. What I need is something to drive it; something with a/d for the voltage in and enough resolution to make it work, and with some GPIO to drive the SPI to the maxim chip....
Any suggestions? Anyone know of a circuit that would do this?
Thanks,
--Yan