![]() This pin is open drain in nature, so it's pulled high through an onboard resistor. This IC can be programmed to generate an Interrupt a on each pulse. Connect this pin to the A4 pin of the Arduino. SDA Stands for Serial Data, through this pin data exchange happens between two devices. SCL SCL stands for Serial Clock the master device pulses this pin at a regular interval to generate clock signal for communication. ![]() VCC is the power supply pin of the Pulse Oximeter and Heart Rate Sensor that can be connected to 3.3V or 5V of the supply. The Pinout of the Pulse Oximeter and Heart Rate Sensor is shown below: All the pins of this sensor module are digital, except VCC and Ground. The MAX30102 Digital Pulse Oximeter and Heart Rate Sensor, and this module have 7 pins VCC, SCL, SDA, INT, IRD, RD, and GND. But for now, let's check other parameters of the sensor MAX30102 Pulse Oximeter and Heart Rate Sensor Pinout This is a very short explanation of how this sensor works and we will elaborate more later in the article. Based on the reflection you can determine the blood oxygen level and heart rate. The main idea is that you shine a single LED at a time and check the amount of light that is getting reflected back to the sensor. This is a sensor designed by Analog Devices and features two LEDs (one Infrared and one Red), a photodetector, optics, and low-noise signal processing unit to detect pulse oximetry (SpO2) and heart rate (HR) signals. The MAX30102 is a very versatile sensor and it can also measure body temperature other than heart rate and blood oxygen level. The MAX30102 Pulse Oximeter and Heart Rate Sensor ![]() So without further ado let's get right into it. So in this article, we will interface the popular MAX30102 pulse oximeter and heart rate sensor with Arduino and in the process learn how this sensor works. Not only heart rate, this device can also measure the concentration of oxygen in blood. A digital pulse oximeter and heart rate sensor is an electronic device which can measure the heart rate of a person by measuring the difference between oxygen rich and oxygen less blood.
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