I have an apparently simple question, but I can't seem to figure it out.
I learned in school that the generators (source powers) are defined by their voltage, and that made a lot of sense to me. Afterall, we say 1.5v, 6v, 9v, batteries, right?
But I noticed that in my source (that converts from wall socket's 100-240V AC), it reads: Output: 5V, 1A. My question is, how can it possible have a constant voltage and current? That makes no sense!
That is, we have U = Ri, and R is fixed in the circuit (sum of the resistance of the wires and components), so the source has to specify either the voltage OR the intensity of the current, not both! The other value is calculated, given the resistance. So which one is it? And what does the other value in my source means? Is it the maximum voltage/current? That would make more sense.
My problem with this was that I was trying to make my Integrated Circuits Chips (SN74LS series) to work with this source, but I think they burned out, because they simple didn't work. I made I simple test with the NOT gate, and it did nothing. It's such a simple setup I think it's very likely it has burned out. The 1A really freaked me out when I read them (after testing), because I'm aware that the regular current in a circuit is around 20-50mA (way less). If the current specified is the maximum (as it was clear to me), it should have worked; if the current was fixed, and the voltage was the maximum, then it might had burnt out, as it did in reality - but that makes absolutely no sense to me. What I am missing?