Buck Converter Controlled by Arduino Uno

The paper presents a buck converter controlled with microcontroller integrated on Arduino Uno board. The control is implemented by use of PI controller embedded on Arduino Uno board. Open loop control-to-output transfer function is obtained from measured step response. The PI controller and feedback divider transfer functions are synthesized to get desired loop gain. As a verification of analysis, input voltage step responses of regulated and unregulated buck converter are compared and improvements are identified.