LM324 IC Operational Amplifier IC
Pin1 (OUTPUT1): O/p of the 1st comparator
Pin2 (INPUT1-): Inverting i/p of the 1st comparator
Pin3 (INPUT1+): Non-inverting i/p of the 1st comparator
LM324 is a quad operational amplifier (OP-AMP) in one integrated circuit package and all 4 op-amps can be power by the single supply voltage. These amplifiers can operate from 3V to 32V and differential input voltage can be equal to the voltage supply.