BLOCK DIAGRAM

This is block diagram of development of electronic stethoscope.  For this block diagram, the input that the microphone stethoscope will receive is heart beats vibration on the diaphragm. Then this vibration of sound will enter to the condenser sensor to produce the voltage output for heart beat. Operational amplifier will increase the voltage supply when move to the output, then enter the voltage comparator as a high or low circuit to make the digital input signal that can be read by the software IC  that is as an indicator to the signal that came out from the heart beats sound signal.

This signal input then will enter the microcontroller of arduino that is at atmega 328P to run the software program that being initialize to get the output for display result at the LCD monitor. The result will appear as same as the instruction from the software program that is need.