I am needing some advise on how to build a circuit that can charge a 9v rechargable whilst it is still connected to my small robot. The battery will power an arduino, meastro, 4 std servos and 2 dc motors.
Input to the battery should have something basic that will convert ac to dc just in case.
Secondary to direct dc / ac input, i require another input source but that acts as a harvester. It will take power from solar panels and a piezoelectric source ( so again an a/c to d/c converter could be needed ). Maybe this could put the power into a capacitor of some kind, and when it reaches a required amount, release the power to the battery.
Hope you guys can advise