[Keri] selects them not with his golden ears, but by wiring both pots together as a Wheatstone bridge. A meter between the two wipers would detect any current due to a mismatch. A Wheatstone ...

The Wheatstone bridge is a way of measuring resistance with ... Alternatively, the change in resistance could be so small that our meter couldn’t be relied upon, in which case we’d actually ...

Bridges are an integral part of measurement and measurement devices. Of the many DC bridges in existence, the Wheatstone bridge is the most often used. One use is to measure unknown resistance values.