Complete Circuit diagram of our electronic stethoscope is shown below.
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:
Completed circuit:
Completed Prototype:
Recorded sound: with visualization
Schematic diagram and PCB layout:
1. Schematic Diagram
2. PCB LayoutÂ