Defibrillator analyzers are very useful to understand how defibrillation works and how to use the different types of defibrillators. However, these analyzers are costly, and it is not always easy for a biomedical engineering laboratory to have several of these devices available for student practices. This paper presents the design, implementation and validation of a defibrillation analyzer focused on education. It has been designed with these features in mind: low cost, reliability, free open-source philosophy, easy to manufacture and simple to use by any student. It has an anthropomorphic shape of a human torso, with the ability to simulate cardiac signals with different types of arrhythmias, which in turns allows to perform a defibrillator shock and analyze the discharge signal, obtaining the amount of energy, the magnitudes of voltage and current and displaying the discharge waveform.