I would like to use the barrel jack on the Uno R3 board to help charge my batteries? Does anyone know of any breakouts or shield that would work for this? I am using 2 LiFePO4 18650 batteries, in series. I have the uno board connected to a motor driver board, but the connection between the uno board and batteries is a direct connection. The power pins are connect to the the ICSP pin 2 and 6.
What i want is to be able to plug a power cord into the barrel jack on my Uno board, that if needs be, connect to a battery charging circuit that connect up to the batteries and charge them. I would like to use the connections i already have at pin 2 and 6 to reconnect to the batteries.
What I am looking for first is if there are any pre-built breakouts or shields that does this. Second, if there are no breakouts or shields, some idea on how to build one.
Thank you for your time and help!