First of all, sorry if this is the wrong place to ask this question, please redirect me if it is so.
I have a project in mind involving and EEG, which is the following :
Using a "consumer-grade" EEG (see this one, for example) I would like to be able to control a binary system with my mind (for example, turning a led on and off). From what I've seen until now, this seems to be possible since the headset is able to detect eye blinks, for example. It also gives access to two variables "focus" and "relaxation", which you can learn to control somewhat accurately (accurately enough for a binary system, at least).
Now here's my problem. While the methods that I described above do work, they would also continuously activate even when I don't want them to. Everytime I blink, my led would turn on, even though my intention wasn't to turn the led on. Everytime the "focus" level goes over 50/100, the led would turn on, even though I'm just focusing on my physics problem.
Having said that, I was wondering if it is possible to pick up more subtle and "controlled" information on the EEG. One thing I was thinking about is, if I think and visualise the color red, maybe that could cause a signal that can be picked up ?(Of course the led would activate when I look at something red, but that's still an improvement) Or even looking at the led I want to turn on, would that have any discernable effect on the EEG ? My guess is that those "thoughts" are way to subtle to be picked up by an EEG, which is just an average of the brain activity, but I'm not an expert on the subject !
So I guess my question is : what are the "kind" of thoughts that I can somewhat reliably see on the EEG data ? For example, I know I can reliably pick up a eye-blink. Are there any thoughts that are not related to muscle movement that can also be reliably read on a EEG ?