Variable Voltage Source for 0 to 10V

There are off-the-shelf loop calibrating instruments that can do this.

Use variable voltage batteries.....

Yo guest,

PS1

PS2

on PS2 you can change a few resistors then you can go up to 20 volt

CU L8rz.. T L.

Get an eliminator/rectifer/adapter with voltage selection.It comes cheap. If you are desirous enough to solder a circuit try "electronics for you free circuits" yes google it. All the best.

a cheap, simple alternative: one 120 vac light dimmer, one 120 to 12 volt transformer, one full wave bridge rectifier.

wire the output from the light dimmer to the input (line - 120) side of transformer.

wire transformer output (load - 12) to input on rectifier.

wire d.c. output from rectifier to load.

By adjusting the light dimmer you will see variable d.c. at load.

12V battery and a potentiometer.

You did not really post enough details to warrant a decent answer / suggestion, there are so many ways to accomplish this that we could speculate on your needs ad nauseum. Please state exactly what you want to do, what you have available to work with and how you want it to work.

Or go hire a qualified person to do it for you who can look at all these issues and make an engineering decision.

Check out some of the instrumentation and equipment suppliers. All will have a 'Lab Power Supply' that will probably do what you want. Some are even low cost. Most are ready to go out of the box.