A Heartbeat Sensor is a biometric module that detects pulse rate using optical or electrical sensing technology. It is widely used in health monitoring, fitness tracking, and biomedical applications.
HEART BEAT SENSOR PCB TYPE
Heart beat sensor works on a very basic principle of optoelectronics. All it takes to measure you heart rate is a pair of LED and LDR and a microcontroller. IR led emits infrared radiation and surface reflects the infrared light. Depending on reflectivity of the surface amount of light reflected varies This reflected light is made incident on reverse biased ir sensor which results in reverse leakage current. Amount of electron-hole pairs generated depends on intensity of incident IR radiation. More intense radiation results in more reverse leakage current. This current can be passed through a resistor to get proportional voltage. Thus as intensity of incident rays varies, voltage across resistor will vary accordingly.
FEATURES
·Heat beat indication by LED.
·Instant output digital signal for
directly connecting to microcontroller.
