So I have a Panda II project that is designed to plug into a wall via a 6-9 Volt adapter. It will be plugged in all the time (i.e.; the board is continuously powered).
However, I do not want to contribute to “vampire loads” in the house, so I want to build in an intelligent recharable battery IC that will use the power outlet to charge battery and then (using a relay I guess) close the power source from the wall outlet and switch over to running 100% off of the battery.
The board would then intelligently monitor the battery until such time it comes within say 10% of being depleted and then switch back on the relay to charge the battery again - starting the cycle all over again.
I have to assume such an IC already exists somewhere on the planet but can’t seem to find such a beast.
Any thoughts on how I might buy/build this IC??