MAXREFDES117 Reference Design Maxim MAXREFDES117 Reference Design is a low-power, optical heart-rate module complete with integrated red and IR LEDs and a power supply. This tiny board, perfect for wearable projects, may be placed on a finger or earlobe to accurately detect heart rate. This versatile module can work with both Arduino and mbed platforms for quick testing, development and system integration. A basic, open-source heart rate and SpO2 algorithm are included in the example firmware. The board features 8 sewing tap pads for attachment and quick electrical connection to a development platform.Learn more