I want to use an Arduino to control a 12v, 2A circuit and I need some advice on what components to use to make the interface.
My main concern is that I want the control to be fairly smooth. I don't want to use the raw PWM output because it can introduce a bunch of high frequency noise that I don't want. I can low-pass filter it with a simple RC circuit, but then I need to know what kind of components to use to have the resulting analog 0-5v output adjustably attenuate the power supply.
I think I need some kind of adjustable linear regulator, but I'm just not very familiar with these parts and so I don't know what one will handle the 2A currents that I'm using.
I hope this is an easy question. I also hope I'm not bringing an old question that has already been answered back up. I searched the forum before I posted and found some helpful ideas, but not all my questions were answered so I wanted to post.