Heloo , so im new to arduino but i actualy know some advanced stuff, so you can say to me complicated things that i think i will understand.
( I'm portuguese btw sry if i spell something wrong )
Im currently working on some costum tail lights and i want to detect if current is coming from the original car wires, ill put an image example here i think it will be easier to understand.
I dont know how i will do the connection and the setup code for it
I dont want it to be analog i want it to be just true or false if the current is flowing or not.
And i know i have to lower the current to 5v
thanks in advance