Design with MAX30102 HR + SpO2 sensor in Cirkit DesignerThe MAX30102 is an integrated pulse oximetry and heart-rate monitor sensor module. It combines two LEDs, a photodetector, optimized optics, and low-noise analog signal processing to detect pulse oximetry and heart-rate signals. The MAX30102 is widely used in wearable health devices, fitness trackers, and medical monitoring devices due to its small form factor and low power consumption.
This circuit is a portable health monitoring device that uses an Arduino Nano to interface with a MAX30102 heart rate and SpO2 sensor and a 0.96" OLED display via I2C. The device is powered by a 3.7V LiPo battery, which is managed by a TP4056 charging module and a boost converter to provide a stable 5V supply.
Open Project in Cirkit Designer
This circuit uses a Raspberry Pi 5 to interface with a MAX30102 sensor for measuring heart rate and SpO2 levels, and displays the readings on a 0.96" OLED screen. The Raspberry Pi handles the I2C communication with both the sensor and the display, providing real-time health monitoring data.
Open Project in Cirkit Designer
This circuit consists of an Arduino Mega 2560 microcontroller connected to a MAX30102 heart rate and SpO2 sensor. The Arduino provides power to the sensor and communicates with it via I2C protocol, enabling the measurement and monitoring of heart rate and blood oxygen levels.
Open Project in Cirkit Designer
This circuit integrates a Seeed Studio nRF52840 microcontroller with a MAX30102 sensor module. The microcontroller powers the sensor and communicates with it via I2C protocol, enabling functionalities such as heart rate and SpO2 monitoring.
Open Project in Cirkit Designer| Pin Number | Name | Description |
|---|---|---|
| 1 | VIN | Power supply (1.8V to 3.3V) |
| 2 | SDA | I2C Data Line |
| 3 | SCL | I2C Clock Line |
| 4 | INT | Interrupt pin (active low) |
| 5 | IR | Infrared LED cathode |
| 6 | R | Red LED cathode |
| 7 | GND | Ground |
#include <Wire.h>
#include "MAX30105.h" // Include the MAX30105 library
MAX30105 particleSensor;
void setup() {
Serial.begin(115200); // Initialize serial communication at 115200 baud rate
Wire.begin(); // Initialize I2C
if (!particleSensor.begin(Wire, I2C_SPEED_FAST)) { // Initialize sensor
Serial.println("MAX30102 was not found. Please check wiring/power.");
while (1);
}
particleSensor.setup(); // Configure sensor with default settings
particleSensor.setPulseAmplitudeRed(0x0A); // Set Red LED amplitude
particleSensor.setPulseAmplitudeIR(0x0A); // Set IR LED amplitude
}
void loop() {
long irValue = particleSensor.getIR(); // Read IR value
if (irValue > 50000) { // Check if the sensor is covered
// Read the heart rate and SpO2 levels
float heartRate, spO2;
if (particleSensor.checkForBeat(irValue) == true) {
if (particleSensor.getSpO2(&spO2, &heartRate)) {
Serial.print("Heart Rate: ");
Serial.print(heartRate);
Serial.print(" bpm - SpO2: ");
Serial.print(spO2);
Serial.println("%");
}
}
} else {
Serial.println("No finger?");
}
delay(1000); // Wait for 1 second before next reading
}
Q: Can the MAX30102 be used on a 5V system? A: The MAX30102 operates at 1.8V to 3.3V. A logic level converter is required for 5V systems.
Q: How can I improve the accuracy of the readings? A: Ensure a snug fit against the skin, minimize motion, and avoid direct sunlight on the sensor.
Q: What is the I2C address of the MAX30102? A: The default I2C address is 0x57 (7-bit).
Q: Can the MAX30102 measure heart rate through clothes? A: No, the sensor needs to be in direct contact with the skin for accurate measurements.