heart

Microcontroller measures heart rate through fingertip

Step 1: Sensor assembly The sensor unit consists of an infrared light-emitting-diode (IR LED) and a photo diode, placed side by side, and the fingertip is placed over the sensor assembly, as shown below. The IR LED transmits an infrared light into the fingertip, a part of which is reflected back from the blood inside […]

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Microcontroller measures heart rate through fingertip

LED Heart PWM Fading using PIC18F252