Remember, all op amps only work if you connect the power pins to power correctly! If you try to build any op amp circuit, with any op amp, without connecting the two power pins correctly, it simply won't work.

As you're about to see, the schematic symbol for the op amp doesn't even include the power pins! It's so unambiguous that you need to connect them to power, that we don't even show it in our schematics!

If you continue with analog you'll eventually see a slightly different op amp symbol that has two extra lines coming out of it for the power connections, but the simpler op amp symbol that we're using is much more common.

Both of the op amps we're using in this chapter are dual op amps - meaning each one actually has two separate, independent op amp circuits on it, conveniently both powered by the same power supply.

Not all op amps have the same pin connections, but all 8-pin dual op amps have these exact same pin connections. This is nice because you can build your circuit with one model of dual op amp, and then pop it off and put different one on and see if you can hear or otherwise find any difference.

Also... a quick sidenote about the op amp symbol. You can draw it with the inverting and non-inverting input pins in either position, as illustrated below. Based on the circuit you're making with it it can be easier to draw it one way versus the other.