SparkFun gator:particle - micro:bit Accessory Board
SEN-15271
The SparkFun gator:particle micro:bit Accessory Board incorporates the powerful MAX30102
sensor, enabling sensing of pulse oximetry (SpO2), heart rate (HR) monitoring, and particle (PM)
detection. As part of SparkFun's gator:bit series of alligator-clippable accessories, it can be easily
interfaced with the micro:bit or other microcontrollers via the SparkFun gator:bit! The MAX30102
includes internal LEDs, photodetectors, optical elements, and low-noise electronics with ambient
light rejection. The idea is to pulse the different LEDs, then detect what shines back. Based on the
reflected signature, it's possible to detect different types of particles or materials (such as
oxygenated blood or smoke from a fire).
The MAX30102 is a high-sensitivity pulse oximeter and heart-rate sensor that communicates over an
I2C bus. The specified operating voltage for the MAX30102 is between 1.7V-2V. For use with the
gator:bit (v2) and micro:bit, you should provide 3.3V through the 3V3 and GND pads to keep the
logic levels consistent; the 3.3V input is then regulated to 1.8V for the MAX301
The micro:bit is a pocket-sized computer that lets you get creative with digital technology. Between
the micro:bit and our shield-like bit boards you can do almost anything while coding, customizing and
controlling your micro:bit from almost anywhere! You can use your micro:bit for all sorts of unique
creations, from robots to musical instruments and more. At half the size of a credit card, this versatile
board has vast potential!
FEATURES
gator:bit Compatible
MAX30102: HR and SpO2 sensor
o Operating Voltage: 1.8-2V
o Supply Current:
Heart Rate and SpO2 Mode: 600-1200µA
IR Only Mode: 600-1200µA
o Operating Temperature: -40°-85°C
o (Σ∆) ADC
Resolution: 15-18-bits (programmable)
Sampling Rate: 50-3200sps (programmable)
o IR LED
LED Wavelength: 870-900nm (avg. 880nm)
Forward Voltage: 1.4V
Radiant Power: 6.5mW
LED Driver Current: 0-50 mA (programmable)
o Red LED
LED Wavelength: 650-670nm (avg. 660 nm)
Forward Voltage: 2.1V
Radiant Power: 9.8mW
LED Driver Current: 0-50 mA (programmable)
o Photodetector
Spectral Range of Sensitivity: 600-900nm
Radiant Sensitive Area: 1.36mm2
o I2C Address
0xAE - Write Address
0xAF - Read Address
https://www.sparkfun.com/products/15271?_ga=2.90160991.5532435.1561380120‐1018459942.1513696581/6‐24‐19
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