Kaleb Engineering
Esp32USBC Corvallis Temperature Reading
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MCP2221_DEV
Location
Corvallis, OR
Project Date
Summer 2024
Project Type
PCB/Circuit Design
Info
This Board was created as a test to show how it would be possible to create a MCP board within a square inch of space for Senior Design.
Designed as a compact USB-to-I²C breakout board, this project aimed to demonstrate how small a senior design board could be—nearly 1 in² with potential for further reduction. It featured a switchable 3.3V/5V system and was built from a modified Adafruit schematic. This was the only board I fully assembled and soldered by hand without reflow tools. All functions were tested and passed using Python and Adafruit’s validation guides.
I reverse-engineered the Adafruit Eagle files using Fusion360, recreated the schematic in KiCad, and custom-built symbols for the switch and Qwiic connector. I sourced parts through DigiKey, using 0805 components for easier soldering. After layout and optimization using OSH Park guidelines, I shrunk the board to ~15/16" × 1¼". I assembled the board manually and tested USB communication, sensor control, and voltage switching—all of which worked as expected.
