Abstract
This work presents a project-based learning experience implemented in the third year of the Degree in Physics at the University of Zaragoza within the Physical Techniques II course, focused on the learning of the basic skills in the analysis and design of measurement systems, data acquisition, instrumentation control and data processing of physical systems. Students must integrate the theoretical and experimental knowledge acquired along the course, completing all the scientific method steps that will be required in their future professional activity to design an automated measurement system for a biometric signal such as the heart rate: sensor, conditioner, acquisition, processing and results visualization system. Taking a biometric signal allows the project to be framed within a real application, with a signal presenting characteristics (weak amplitude, low signal-to-noise ratio) that makes clear the need and advantages of performing an automated acquisition to reliably extract the information even under conditions of very high noise level, thanks to its mathematical processing using advanced techniques such as the Fourier transform, all by means of public domain and open source software tools.
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