I am having a hard time understanding the role of a current source. Although I know this isn't true, to me, it seems like the only thing you really need in electronics is voltage to motivate or apply pressure to the electrons that already exist in the copper of the traces and the components of a given circuit or project.
Despite the material I have read, it seems like an Ampere is just an idea - a product of the electrons in a system moving past a point. They wouldn't move without voltage. So when you have a current source from some sort of power supply are you actually introducing more electrons to the system to increase the Amps at a given voltage?
Despite the material I have read, it seems like an Ampere is just an idea - a product of the electrons in a system moving past a point. They wouldn't move without voltage. So when you have a current source from some sort of power supply are you actually introducing more electrons to the system to increase the Amps at a given voltage?