This version has an OPAMP for the current control, this makes the shunt resistor really small saving a lot of energy.

Below all the precompiled HEX files for various type of battery package, but pay attention, i didn't test

the Lithium family!!! The FLOAT is for car lead-acid battery.

Download charger_v2 source

Download cells precompiled

Download charger_v2 FLOAT (HEX inside is precompiled for 13.86V)

Video of the box construction here!

charger 05 brd

charger 05 sch

 MG 3095