I'am trying to acquire single channel EEG on LABVIEW based on Arduino board. How can i increase the amplifier's gain in order to get a good signal ??
Is this an external amplifier? Or an on-board amplifier that the Arduino has? What does your hardware setup look like?
This forum is usually only supports NI products themselves, so I don't know if you'll get a lot of help directly from here about how to work amplifiers.
But researching how amplifiers work would be a good start!
Here is a basic explanation on how gain works.
Operational Amplifier, Op Amp Gain & Equations: