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I need to make a constant current power supply. I am thinking that i could use an adjustable voltage regulator and read the voltage drop across a resistor to measure the curent and use that to modulate the voltage regulator. does that sound right?
I need to make a constant current power supply. I am thinking that i could use an adjustable voltage regulator and read the voltage drop across a resistor to measure the curent and use that to modulate the voltage regulator. does that sound right?
Yes, but it does require that the regulator be built the right way...like the LM317. ...
Yes, but it does require that the regulator be built the right way...like the LM317. You can also do it with an op-amp (similar to how you can build a regulator with an op-amp). YOu can look at the schematic of how a LM317 works and if you understand it you can do the same thing with an op-amp.