Embedded Files
Project Overview
The Unit Converter Calculator is a desktop numpad mated to a display.
It can convert units, make calculations, and send the results to your computer.
This aims to be an essential tool for engineers, especially those who perform numerous conversions and calculations on a regular basis.
Main Features
Multi-mode Functionality
Unit Conversion
Calculator
Numpad
Break-off USB-C Daughter Board
256x64 OLED Display
22x Hotswap MX Switch Sockets
Open-Air sheet metal Case
BOM
Total cost per board: $35.90
(Excluding parts provided ourselves)
Schematic
Full Top Level Schematic:
ESP32-S3-WROOM-1
USB-C Power + Data
OLED Display
16V Boost Converter
3.3V LDO
Key Switch Matrix
Layout
Front Layers
Back Layers
Bring Up
First assembly
ESP32, LDO, Boost Converter, USB-C Connector
First assembly
Display Connector & Passives, Switch Sockets & Diodes
Small hotfix after display didn't function
Successful display test
Full case + PCB CAD design
Manufactured case components
Lasercut & bent aerospace-grade aluminum + 3D printing
Final Assembled Product
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