Medelektra 2.0 is a system of acquisition, visualization and processing of biological signals: Temperature, pulse and oximetry, ECG and EMG. The first stage is the analogical acquisition where the circuits for measuring temperature and pulse oximetry were designed, linked, implemented and adapted to an analogous-digital conversion stage, to finally transmit the signals to the computer where they were processed and visualized through an interface implemented in Matlab, the first interface let the user to visualize in real time and save that signal, the second one is offline and has different signals to process by segments or the completely.