Generally we use the term power supply, but sometimes i also see the term power rail being used. What is the difference? When should i say power rail and when power supply?
Power supply is the source of power: battery, wall wart, benchtop supply, you name it.
Power rail is, simply speaking, the name for the wire feeding power to a circuit. Also the trace on a pcb or a length of massive conductor resembling a "rail" (my guess: that's where the name comes from).
Generally we use the term power supply, but sometimes i also see the term power rail being used. What is the difference? When should i say power rail and when power supply?
Do they call it a rail - because it supplies all the parallel connections to the circuit?
(in a bar type form, on the top and the bottom, im talking about.)