shanu Posted October 29, 2004 Report Share Posted October 29, 2004 answer me as early as possible Quote Link to comment Share on other sites More sharing options...
audioguru Posted October 31, 2004 Report Share Posted October 31, 2004 Hi Shanu,My corrected and improved Electronic Stethoscope-2 project has been posted recently in our projects section. It is here:http://www.electronics-lab.com/projects/science/019/index.htmlI have used a cheap low-noise TL072 dual opamp for its mic preamp and low-level filter, instead of noisy 741 opamps. The descriptions of all opamp functions are explained. The precision filter is explained in detail.The circuit description also describes why an LM386 1/4W power amp was used to drive the headphones instead of a 741 opamp. Quote Link to comment Share on other sites More sharing options...
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