Main Question or Discussion Point
if you have a power source, how do you keep the voltage constant while varying the current?
Vary the load.if you have a power source, how do you keep the voltage constant while varying the current?
Huh ??? I have no idea what you mean. Draw a circuit diagram. I'm sure the answer is no, but I'd still like to see a diagram.this is a pretty ghetto solution but, after the load, could i reverse bias a few zener diodes to get the V back up?
You misunderstand power sources. The fact that your source CAN put out 10 times the current you need does not mean it WILL put out that current. It will put out whatever current is drawn by your load. That is, if you have a 10volt power source that can produce one million amps of current and you hook it to a 10 ohm load, it will put out 1 amp of current. The fact that it CAN put out one million amps is irrelevant.are you saying if you apply a load across something, there is no potential drop?...
i need a power source with a certain voltage and current output. the power source i have at hand has the correct voltage i need, but it has 10 times the current output i need (at that particular voltage). you suggested a load to lower the current. fine, but i need to put the this load in series with the actual load that i'm trying to power which will mess with the potential across the actual load i need to power. so to get this potential back up to the original V_out by the power source, i was asking if reverse biasing a few zener diodes in series would raise the potential without affcting the current output of the power source.