I have 'recovered' a C4570HA amplifier chip (from a defunct a music amp) and am hoping to put it to use.
I have a sensor (i'm building a pyranometer with a PV cell) that produces 0-40mV DC. I want to bump that up so I can read on an Arduino. Amongst other things I'm going to connect pin #3 to GND and pin #4 to sensor pos, then measure pin #2 (Vout) on one of analog pins of arduino.
What I am trying to understand is (pls bear in mind I have no idea what I am doing)