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A Wearable Pulse Oximeter

In this report, the design and implementation of a low-cost, portable and wearable pulse oximeter is presented. A pulse oximeter is a non-invasive device capable of monitoring the blood’s oxygen saturation. It has been widely used in the medical, fitness and clinical care worlds. A low-cost wearable oximeter can significantly expand its applicability. The goal of this capstone design project was to design and build a low-cost wearable pulse oximeter, by using wearable electronics. The system consists of three main parts: 1) the optical sensor: consisting of the optical transmitter and receiver for emitting the light and receiving it and filter; 2) the microcontroller: which receives and processes the signal to display the heart rate and blood’s oxygen saturation on an LCD display in real time; and 3) mobile phone app which is designed to receive data wirelessly through Bluetooth. The app can send the data to another phone via text message, which will make it easy for sending the heart-rate information to medical doctors in real time, in case of emergency.