The MAXREFDES117# is a heart rate and pulse oximetry monitor. The 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 works with both Arduino and mbed platforms for quick testing, development and system integration. A basic, open-source heart-rate and SpO2 algorithm is included in the example firmware. The board features 8 sewing tap pads for attachment and quick electrical connection to a development platform.