Some progress regarding Experiment 3.

Using the analog amplifier circuit, built for Experiment 2, we have been able to record an ECG signal on a digital oscilloscope screen.

Capture

After having connected the analog amplifier’s output (pin 6 of the U4 op-amp) to the analog Line  In  input of the OMAP-L138 LCDK board, we were able to obtain a  digital    signal of approximately 1 Hz frequency with clearly distinguishable QRS peaks on a PC screen, using the Oscope/Analizer function of the winDSK8 software. The signal, however, was distorted by  a  60Hz noise, which is to be removed by means of a digital Notch filter.  The results  for  filtered ECG signal, as well as the   lab guide for Experiment 3 will be posted soon.