This is the accompanying receiver circuit to my cable tracer project. The sender circuit is named "Cable Tracer - Sender". One intricacy here is the use of a narrow bandpass filter to specify the sender's frequency. This will make it easier for the receiver to differentiate between the unwanted noise in the cables (such as 50/60Hz mains frequency) and the sender's frequency. The gain can be controlled via the 4.7k potentiometer. Just close the switch on the right to start the simulation.
