I have a question regarding the placement of the potentiometer pictured below. There are three solder points for each placement (RV1 and RV2), however I see an extra one in the middle. Is this one supposed to be a stand alone solder point or am I missing something?
Also I am not sure if it is even a potentiometer. If it is, am I supposed to connect something external to it so I can physically control the current?
Also I am not sure if it is even a potentiometer. If it is, am I supposed to connect something external to it so I can physically control the current?