I am building an electromagnetic field detector for a school project, and I need some help getting started with the analysis of the circuit.
**broken link removed**
1) How do I figure out the gain of the op-amp? Without an input resistor, I am lost.
2) Why does the meter not work when the headphones are plugged in? Is it because that branch is the path of least resistance?
**broken link removed**
1) How do I figure out the gain of the op-amp? Without an input resistor, I am lost.
2) Why does the meter not work when the headphones are plugged in? Is it because that branch is the path of least resistance?