Arduino

creating variable voltage source

PWM output and RC low-pass filter

How much voltage?

How much current?

What's the application?

Are you trying to make a variable power supply? If so, does it need to be digitally controlled/programmable, or can you use a manual knob?

I thought johnwasser nailed it. Corresponding level of detail in the answer as the question.

I suspect the OP is not quite so amused as I am though...... :grin:

Regards,

Graham

ghlawrence2000: I suspect the OP is not quite so amused as I am though.

Never mind. We are, and that is more valuable than a "one hit wonder". :D