This is a bare PCB, not a kit. You have to buy the electronic components separately.
Build a 12V lead acid battery charger with a LM338 using this PCB.
RV1 is a trimmer connected in series with R1 to adjust this resistor’s value precisely.
Depending on your battery’s charging current you may have to solder the LM338 externally with a big heatsink.
board size: 48.5mm x 48.5mm
This is a prototype. Use it at your own risk