Arduino Library for controlling the Analog Devices AD5231 SPI Digital Potentiometer (DigiPot). The Analog Devices AD5231 Digital Potentiometer (DigiPot) has a 10 bit resolution(1024) avalable in several values (10 kΩ, 50 kΩ, and 100 kΩ) with either 3-5V single supply or +/- 2.5V communicating over SPI.