I am attempting to make my own adjustable voltage supply that provides a positive voltage (anywhere from 0 to +200 VDC).
The sections I have devised so far are able to provide 450 VDC, however I need an exclusively positive voltage and one that is 200 VDC or less (voltage going to the load will be 0-200 VDC).
Unfortunately, I'm not too experienced with wiring potentiometers for this kind of a situation. To my knowledge, this is how a potentiometer would usually be included into a circuit (please note that while this diagram uses a motor, I will not be using one in my set up):
If I wanted to only have a positive voltage going to my load, should I simply ground the negative lead shown in the picture?
P.S. If people are curious about the load, it is simply a grid bias for a thyratron, nothing terribly advanced that requires anything beyond 0-200 V.