Main PCB

We decided to break up our design into two boards for better layout flexibility, as well as to fit size and complexity constraints.

Our main PCB includes:

  • STM32F4 series chip

  • QSPI Memory: for storing patient data

  • Battery management system

  • Power regulators

  • MIPI DSI connector: for controlling the touch screen

  • Peripheral board connections

  • Optional communications PCB attachment point

Peripheral PCB

Our peripheral PCB includes:

  • Temperature sensor: reads the temperature from the surface of the Peltier module

  • H-Bridge: for switching between heating and cooling modes

  • EmStat Pico: conducts blood chip test

  • Multiplexor: for test point selection

  • Mainboard connector: power and communications

Assembled Device

After receiving the boards, we updated our enclosure design to allow more space for internal components. The enclosure features:

  • USB Type C port at the bottom for charging

  • Blood chip is inserted at the top of the device

  • Power button is on the right of the device

  • Hot air produced by the Peltier module is exhausted through the opening at the left side of the device