Speed control of a CPU fan*

This work presents a minimalist lab equipment, the speed control of a CPU fan using an Arduino, which, because of the low price of its components, is particularly suitable as a take-home lab for courses implementing a project-based learning methodology. This system presents a multidisciplinary challenge in which students need to apply knowledge of electronics, programming, signal processing, and control. By assembling and controlling this simple device, which consists of only five components, students can learn basic mechatronics and control concepts at the undergraduate level.