Now, this is your chance to use all of the AC circuit analysis techniques that

we've learned so far in the course. To figure out, in great detail, exactly

how this circuit works. So I want to take you through this

analysis. I and I really want to encourage you to

sit with a paper and pencil. Draw the circuit diagrams.

label all of the components, and write down the equations.

And try to reproduce every step that we take here.

The only way to do this, to learn this, is to do it yourself.

So, I'll, I'll take you through it. But you really need to sit down, and

figure this out on your own, at the same time.

So, here's the model of the pickup that we talked about a couple of weeks ago.

When I introduced electric guitar pickups.

So you have the, the pickup inductance from all of the coils of wire.

That wire has some resistance that is in series, then, with the inductor.

And then you have a voltage that's generated by the motion of the string in

Faraday's Law. And, but unfortunately you also have

small turn to turn capacitance, a parasitic capacitance in the pickup that

gives you a shunting capacitance. That goes across this, this whole thing.

So this was the model of the pickup and if you look back at those old videos to

see how the frequency responds, the pickup was a function of the R, L, and C

values here. Now, to analyze the circuit in more

detail, the first thing I want to do is transform this model.

Now, I'm not going to drag you through all of the detail of, of how to do this,

but you can figure out a way to represent this circuit as the circuit.

And actually, this is a more advanced topic then we're going to go into in this

course but you can use Thevenin's and Norton's Theorems.

They're really, they're just techniques for finding equivalent circuits for.

If I have a complicated circuit, I can reduce it to a simpler equa, a thevenin

or Norton equivalent circuit. Now if you want to look up those

techniques, and learn a little bit more about that.

Then, wonderful. But we just don't have time to go over

that in any detail here. But we can figure out what I want to

calculate here, is, if I look at this terminal.

And ask, what is the open circuit voltage at that terminal?