I'm currently using an EEG toy called the Star Wars Force Trainer II to read concentration. You can see Micheal Reeves doing it here: https://www.youtube.com/watch?v=mPbtR4vorgY.
The problem is that the signal strength almost never drops down to 0 (counterintuitively, 200 is worst and 0 is best) and I need it to drop down to zero to read attention statistics. It would be un ideal to use conductive gel... are there any other things I can do? Or maybe something I'm doing wrong?
I've attached photos of my setup, as well as the measurement of the resistor I'm using.
Please explain what is signal strength and where are you reading the signal. If using the A/D pin and getting a constant low value, you have a DC bias from your instrument. Either fix that or just subtract 200 from the value being read.
The breadboard looks wrong to me..
Both wires are in row 17, they are connected..
The resistors has both ends on row 17, it is not doing anything..
Move one wire and one leg of resistor to an adjacent row and test again..
Hint: you should be able to measure the resistor between the 2 wires..
Seems like it. I dunno, the tutorial did say to use a 220 ohm resistor, and I'm using a 1 million ohm resistor. But that probably shouldn't affect anything.
Alright, fine. I found a 200 ohm resistor and correctly set it up. Unfortunately, it made no difference and the signal strength is still fluctuating between 25 and 55.
