I would like to construct a simple adjustable dc voltage supply--just general use sort of thing: prototyping, experimenting, etc.
I was considering using the LM317 voltage regulator--two of them, actually, so I could have two outputs--and potentiometers to adjust the output voltage. As far as the range, I was thinking 1.25v to 20v, and 1.5A max for each output.
I got the idea from this project, but obviously I want the output of mine to be adjustable AND, if possible, I don't want to mess with transforming dangerous AC voltages.
I don't necessarily need help with determining resistor ratios or anything (unless there's a better option than a potentiometer), but I could use some advice on where to obtain a suitable "wall wart" type AC/DC transformer that I could use to power this project.
Is it OK for my two LM317's to draw power from the same source? If so, I assume it would need to be rated for 3A, but what voltage?
Thanks in advance for the help!!
I was considering using the LM317 voltage regulator--two of them, actually, so I could have two outputs--and potentiometers to adjust the output voltage. As far as the range, I was thinking 1.25v to 20v, and 1.5A max for each output.
I got the idea from this project, but obviously I want the output of mine to be adjustable AND, if possible, I don't want to mess with transforming dangerous AC voltages.
I don't necessarily need help with determining resistor ratios or anything (unless there's a better option than a potentiometer), but I could use some advice on where to obtain a suitable "wall wart" type AC/DC transformer that I could use to power this project.
Is it OK for my two LM317's to draw power from the same source? If so, I assume it would need to be rated for 3A, but what voltage?
Thanks in advance for the help!!