Heart beat monitoring works with PPG sensors: https://www.theengineeringprojects.com/2023/01/heartbeat-monitoring-system-with-ads1115-raspberry-pi-4.html PPG & ECG sensors works with the ADS1115, but we did not yet find any EEG project which use the ADS1115 after a first quick google search. Several years ago, we asked Scott Harden if it was possible to replace his ECG chip for instance with an …