Submarine Mainboard

During the winter quarter this year, my friends and I were looking for projects to do. Because many of us have the hobby of angling, we decided we wanted to create a submarine to map out some of the lakes we fish. While I don't know if we will continue to pursue the project, I did learn a lot about circuit design from it so far.

Design constraints

In terms of circuit design, a few outputs were necessary:

• Embedded Processor
• At least 8 PWM outputs (this is for driving motors + servos)
• Sensors
  • At least 4 Analog inputs (special sensors)
  • At least 4 I2C ports
  • 2 SPI ports (1 used for an on-board SD card)
• And a UART telemetry module

Schematic

The shematic was split into 3 main parts:

• ROOT
• SOC
• POWER

SOC and Power

These were by far some of the more simple schematics.