I am building a irrigation system fully powered by 12V battery.
The final configuration will be addressed for an arduino PRO MINI or NANO.
I am following the schematic proposed by Larry:
I am not sure I have hooked up all the wires correctly.
I attached two photos.
Could you please help me to double check that everything is right.
In particular, I do not understand the reason and if I hooked up the resistances in series correctly.
Thanks for the help