Full Circuit of Electronic Stethoscope

Complete Circuit diagram of our electronic stethoscope is shown below.

Full Circuit Diagram

I discussed every stage of the circuit in my previous posts. Here it just shows the integration of all of the parts and  a constant 5V DC supply circuit (top in the picture) is added.

The overall performance of the circuit:

Frequency Response:

Frequency Response of the Overall Circuit

Completed circuit:

Completed Prototype:

The prototype of the Electronic Stethoscope Device.

Recorded sound: with visualization

Schematic diagram and PCB layout:
1. Schematic Diagram
2. PCB Layout