Gasoline being stolen or catalytic converter sawed off car at night may be thwarted
by microphone pickup to amplify sounds into bedroom while you sleep. True, some park beside your car and slide underneath your can in the daylight to cut off catalytic converter. This could be helpful to mother to monitor her child as well.
The two 8 ohm resistors are speakers to listen or receive. Both AC generators and switches are to run simulation.
Transformer can be stepped up if needed and the audio amplifier is LM380 powered by 8 to 20 volts DC.
Simulation shows talking from left side and listening on the right side. Open 700 Hz. switch, push both SPDT switches up, close 550 Hz. switch to reverse direction of talk and listen simulation.
