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:. Electronic Stethoscope. Stethoscopes are not only useful for doctors, but home mechanics, exterminators, spying and any number of other uses.. Circuit diagram. Parts: R1 10K 1/4W Resistor R2, R3, R9 2.2K 1/4W Resistor R4 47K 1/4W Resistor R5, R6, R7 33K 1/4W Resistor R8 56K 1/4W Resistor R10 4.7K 1/4W Resistor R11 2.5K Pot R12 330K 1/4W.
Figure 2: Current electronic stethoscope circuit diagram with microphone input located on the left and audio outputs on the right Image Courtesy of: Spring 2011 Stethoscope Team. University of Wisconsin Madison: Department of Biomedical Engineering Electronic Stethoscope 7. Electronic Stethoscope circuit. Read Also: 4 types of Preamplifier circuits using Transistors; High impedance small amplifier circuits; Try simple FET Preamplifier circuit (Very high impedance) Here is step-by-step a process. The piezo speaker(PZ1) will detect the heartbeats.