Biometric Watch
Monitor your vitals
Manan, Noah, Sanjana, Vincent
Embedded Files
Overview:
This project aims to develop a wrist-worn device capable of continuously monitoring heart rate, blood oxygen saturation (SpO2), and skin temperature.
Description:
This project attempts to create a compact, ultra low power, Bluetooth connected biometric watch, able to send data directly to a smartphone over 2.4GHz short-range radio frequency band. It offers a portable and efficient wearable, integrating sensing, compute, power management, and communication all within a small PCB.
Features:
MAX30102 optical sensor for pulse oximetry
STS4X temperature sensor
PCB Status LED to monitor power delivery
SR4W035 2.4 GHz Bluetooth antenna for smartphone connectivity
NRF52832 for low TDP and high efficiency: single 2032 cell is able to power device for 15+ hours
Ultra-compact 4 pin connector for flashing
Complete Schematic
Individual Component Schematics
Buck step-down converter to take +3 volts down to +1.8 volts for the MAX3010 sensor
Boost converter to take +3 volts from the coin cell battery to +3.3 volts for the IC to use
Digital skin temperature sensor
Bluetooth Antenna
MAX30102 Sensor for blood oxygen and pulse (right side)
NVT2003 Logic Translator to convert +3.3v to +1.8v I2C communication from the NRF52832 microcontroller to the MAX30102EFD pulse oximetry sensor
Complete Layout
Front View
Back View
Completed Bill of Materials
Progress:
Arrival of PCBs from JLCPCB!!
Applying solder paste & initial component placement
Finished placing components
Reflow soldered the front side of PCB
Front
Rear
Finished PCB!!
Page updated
Report abuse