differential inputs with gain (10x or 200x): Arduino Mega2560

Other Hardware Sensors
1

Hello to all.

I am a beginner and I have a school project to develop the Arduino Mega2560.
It consists of 2 electrodes that are placed on the head. I have to measure the potential difference between them (because one of them is the reference), amplify the signal and make a chart.

My big problem is that I can not find and do not even know how to use differential inputs with gain (10x or 200x).
Somebody please (with some urgency), can give me an example code ?

Thanks for your help.

2

start here. (there are several methods that can be used)

If the amp. shall run from 5V, choose a rail-to-rail opamp / intrument amp