if you look at it as if the middle connector.. known as the wiper is right in the middle we would see half of the output voltage on the wiper connection..
as we move it closer to the negative side we would see less volts down to zero. and if we move it to the positive side we would get more volts all the way up to the 25VDC max +
so with this we have hooked up to our DC power we now have a variable output voltage from 0 to 25VDC.
the problem now is that a potentiometer will only take a small load before it burns up.. this is where the transistor comes in
how are we doing.. you guys learning this stuff??