https://petergamma.org/category/optical-heart-rate-sensor/ 2. Why we will not choose products which are based on the ADS1299 EEG chip from Texas Instruments for our application: here: https://petergamma.org/tag/ads1299/ here: https://petergamma.org/tag/openbci/ here: https://petergamma.org/tag/openbci_made_in_china/ and here: https://petergamma.org/tag/pi-eeg/ 3. We will not choose YouTube video makers and product reviews and offers which we find somewhere in the web as a source where …