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