Heart rate detection circuit diagrams

Posted on Mar 28, 2007

Cadmium sulfide photoresistor CD1 fingertip can be detected through the filter, CD1 form the sense amplifier feedback network, a part of the sense amplifier ICA produces weak s

Heart rate detection circuit diagrams
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ignals, these signals may be further amplified ICB. These signals are often used and user-adjustable threshold for comparison, comparator ICD trigger piezoelectric buzzer PZ1 the switch.

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