I found this voltage divider. It is a part of this project for a PIC based ammeter.
This is so simple but for some reason I am having trouble envisioning what he is trying to do here.
I realize the two wires going to the top of the page go to the 2 analog inputs of the PIC and the PIC will read the voltage drop across the .47 resistor and calculate the current.
But what I can't figure out is how any voltage appears on the right most analog input.
Why does he label one side input and the other side output?
How would I simulate the whole thing in Spice? If I see it then that will help me to understand better what is going on.
This is so simple but for some reason I am having trouble envisioning what he is trying to do here.
I realize the two wires going to the top of the page go to the 2 analog inputs of the PIC and the PIC will read the voltage drop across the .47 resistor and calculate the current.
But what I can't figure out is how any voltage appears on the right most analog input.
Why does he label one side input and the other side output?
How would I simulate the whole thing in Spice? If I see it then that will help me to understand better what is going on.