A digital system was designed to control a Varian Auger spectrometer to perform automatic data acquisition and data reduction. It is based on the Apple II personal computer. The advantages of the system are: low cost, simple design and construction of interface circuits, and great flexibility and power for different setups. A detailed description is given for the interface circuits, the analog‐to‐digital converter, and the digital‐to‐analog converters. Finally, it is discussed how to make changes in the original design to suit different needs.