This is an output pin at which a filtered analog signal is present, and it gives the electrical activity of the heart. In AC Lead Off detection mode LO- is always LOW. RA (of module AD8232) is connected and LO- is HIGH when electrode at –IN (of IC AD8232) i.e., RA (of module AD8232) is disconnected. In DC Lead Off Detection mode LO- is LOW when electrode at –IN (of IC AD8232) i.e. LA and RA (of module AD8232) are connected, and LO+ is HIGH when the electrode at LA or RA is disconnected. In AC Lead Off Detection mode, LO+ is LOW when electrodes at both +IN and –IN (of IC AD8232) i.e. In DC Lead Off Detection mode, LO+ is LOW when electrode at +IN (of IC AD8232), i.e., LA (of module AD8232) is connected, and LO+ is HIGH when electrode at +IN (of IC AD8232) i.e. ECG Module Data Output and Comparator Pins Pin Name To detect which method is being used, LEAD OFF DETECTION is implemented in this module. Two Electrodes method uses the AC signal, and the Three Electrodes method uses DC signal. ![]() There are two methods to detect the heartbeat: the two-electrode method and Three electrode method. ![]() We can connect three electrodes to this connector instead of RA, LA, and RL pins using a 3.5mm male jack. This connector has been provided as an alternate of RA, LA, RL pins. 3.5 mm Female Biomedical Electrode Connector Jack
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