I am a complete beginner in electronics but am a fast learner and very keen to take on a project.
Here I found from a forum search on here some threads back EOG part this is the one I think you are talking about
ld4all.com/forum/viewtopic.php?t … hlight=eog
A long while back there was a guy on here called meusopusmagnus and he was working on EEG type device for detecting REM by wearing something on your finger. Unfortunately his profile shows he hasn’t visited the site for a few years. Of course all of these methods were being worked on years ago with nothing coming out. IR sensors have come a long way and I think there more simple and accurate now with the current state of technology. Which is why I would rather go down the route of IR sensors.
Here is a real world product that uses EOG technology. greatlakesortho.com/commerce … ?nPID=1752 The watch PAT-200 and watch pat-100 by imatar medical. Both models cost $5000, they detect REM/NREM and loads of other things all from a sensor on the finger. Now if only we could create that tech for under $100. If we bought one of these and stripped it apart and made the device light up some LED’s when the sensor picks up REM.