Digital Potentiometers:
Digital potentiometers are three-terminal resistors with an adjustable center connection. To set the output resistance, a digital signal is sent through an electrical interface.
Digital Potentiometers: Learn more
Kelvin-Varley Voltage divider circuit - more economical than the DP-500. Operates in the same way as the DP-500, except that it has an additional, but variable resistance in series with...