How To Make an Electronic Stethoscope

Stethoscope is not only for doctors it is for home mechanics spying exterminators ext.. A Stethoscope uses op-amps to amplify the signal and includes a low pass filter to remove background noise.
 

(electronic stethoscope)

  

YOU MUST NEED

              

                      1.Capacitors

                      2.Resistors

                      3.Diodes

                      4.Amplifier

                      5.Microphone

                      6.Misc

 CKT DIAGRAM

           (circuit diagram)

HOW TO BUILD

1.Build the circuit using vero board

2.Use shielded wire for the Microphone

3.Make it Build Smart