HexCalc

The HexCalc is a business card-sized calculator designed for microcontroller developers. It supports hexadecimal, decimal, and octal bases, making number representation easy to understand with binary visualizations and ASCII characters. The calculator performs standard arithmetic and specialized functions like bit math (AND, OR, NOR, XOR), modulus, bit shifts, and 1’s and 2’s complement. Users can set bit depth (8, 16, 32, or 64 bits) to simulate real-world programming environments. Additionally, it features a color mode to convert and visualize 16-bit and 24-bit color codes directly on its TFT screen, providing a useful tool for developers working with color data.

The hardware all operates perfectly, however due to variations in the screen sizes, the holes in the TFT display board don't always line up. I plan to create some 3D-printed shims to hold things in place, but realistically they aren't necessary anwyay.