I am looking to detect 12+v12+V from a car wire using an Arduino.
I have found the following schematic:
I know how crazy automotive voltage can get so iI just want to make sure the schematic iI found above will accommodate the crazy random currents that the car could produce.
Also, wouldn't iI need some type of heat sink taken that iI am stepping down a +12v+12V to 5v5V or less? That, in my mind, would produce a pretty good amount of heat?