10Pcs LM324N LM324 324 Low Power Quad Op-Amp

so now I'm going to do a couple of videos on the op-amp that we are using an op-amp as an operational amplifier and for this class we need to use one when we are working with the strain gauge so I'm going to go over using the LM 324 n which is the one provided with our class notice that it is a quad op-amp meaning that there are four different ops on one single chip so you know on the left hand side starting at one we have the first three pins are the first op-amp always remember it again that the notch here is the the top for the chip so the first thing we have to understand is the sort of diagram symbol for the op-amp if you see it's a triangle and often it has five different inputs often only the two voltage inputs and the output are shown but let's just go through this if you see the plus sign here it does not mean charge or positive voltage or anything like that it is what we call