This digital stethoscope can be used as computer aided diagnosis (CAD) applications for the detection of cardiac murmurs. It can assist physicians in analyzing cardiac signals in real time during auscultation to reduce the risks of not detecting heart murmurs conditions. The Stethoscope system is built based on ATmega644 AVR microcontroller and custom-built sensor to […]
This simple circuit is used to detect variations in electromagnetic fields around us. It based on an instrumentation amplifier INA122 for Texas instrument. As sensing element, the detector is equipped with Inductor (100uH-1mH). The output is routed out to oscilloscope through a BNC connector. A 9v battery is used to power the circuit.