Heart Rhythm Tester (the 3rd)

Published:2011/6/23 21:39:00 Author:Felicity | Keyword: Heart Rhythm Tester (the 3rd) | From:SeekIC

Work of the circuit The circuit consists of sensor B, pre-amplifying circuit, low frequency amplifying circuit and capacity amplifying circuit. (It is shows in picture 9-55.) When you use the tester, put it on the heart area. Use hands to fix it. B changes the sound of hearting beating into electronic signal. The electronic signal is pre-amplified by V1, sound controlled by RP2, low frequency amplified by V2 and capacity amplified by V3, V3. The amplifier BL will play the amplified sound of heart beating.



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