Little Bird
MAX30102 Heart Rate Sensor Module
The MAX30102 is an integrated heart rate and pulse oximetry (SpO2) sensor module. It combines red and infrared LEDs, a photodetector, and low-noise analogue ...
The MAX30102 is an integrated heart rate and pulse oximetry (SpO2) sensor module. It combines red and infrared LEDs, a photodetector, and low-noise analogue electronics in a single package, communicating over I²C. Ideal for wearable health monitors, fitness trackers, and biomedical prototyping.
The module accepts 3.3–5 V input and draws a maximum of 6 mA. A software-controlled shutdown mode reduces standby current to near zero, making it well-suited for battery-powered applications.
Key Features
- Heart Rate + SpO2 – Measures pulse and blood oxygen saturation via PPG
- Dual-Wavelength LEDs – 660 nm (red) and 880 nm (IR) for accurate readings
- 18-Bit ADC – High-resolution analogue-to-digital conversion
- Adjustable Sampling Rate – 50 Hz to 3200 Hz
- I²C Interface – Standard two-wire connection to any microcontroller
- Low Power – 6 mA max; software shutdown for near-zero standby
- Interrupt Pin – Hardware interrupt for real-time event notification
Specifications
- Sensor: Maxim MAX30102
- Input Voltage: 1.8–5 V DC
- Current Draw: 6 mA max
- ADC Resolution: 18-bit
- LED Wavelengths: 660 nm / 880 nm
- Sampling Rate: 50–3200 Hz
- Operating Temperature: −40 to +85 °C
- Interface: I²C
Pinout
- VIN – Power input (1.8–5 V DC)
- SCL / SDA – I²C clock and data
- INT – Interrupt output
- RD / IRD – Ground for red and IR LEDs
- GND – Common ground
Ideal For
- Wearable fitness and health monitors
- Biomedical and SpO2 prototyping
- Arduino and Raspberry Pi health-sensing projects
Package Contents
- 1× MAX30102 Heart Rate and Pulse Oximeter Sensor Module
Jargon buster
Plain-language definitions for the technical terms used above.
- ADC
- An analogue-to-digital converter reads a changing voltage and turns it into a number the microcontroller can use. It matters when connecting analogue sensors such as light, sound, or variable-resistor sensors.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- Torque
- A twisting force that causes something to rotate, usually measured in newton-metres or kilogram-centimetres. It matters when choosing motors, servos, gears, and tools because higher torque is needed to lift heavier loads, turn larger wheels, or move mechanisms without stalling.
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Sensors & Input
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