Using a microcontroller to charge a NMH battery?

[MillenniumFalsehood]

I have a large project that has need of an independent power supply for one area, and I was thinking about using a microcontroller to switch off the main power when the NMH battery is fully charged. Something like telling it "if v=12 disconnect power, else connect power to batteries" to make it top off the 12 volt battery pack. I'd have it also monitor a switch at the same time to make sure both sections aren't connected when it uses the batteries. I'm pretty sure this is something I can have a small PIC do, I just wanted you guys' thoughts on such a project.

[EVApodman]

Such a project is possible but it involves much electronics. I know from similar type circuits in emergency battery power supplies to stop main charging once the batteries have reached their maximum charge.

[seam-filler]

Try trawling through Arduino sketches. A very quick search turned up the following (although this is just the charger, not the switch you want)

https://www.allaboutcircuits.com/projec ... y-charger/

[MillenniumFalsehood]

Thanks for the link! It was a really good read and a big help with this project.