Designed and built a custom scale for a high school chemistry teacher, who suggested the project as a way to visualize molecular quantities in everyday samples. The hardware was constructed using an Arduino Nano, HX711 load cell amplifier, and associated circuitry housed in an aluminum enclosure. The device sends mass data via Serial to a companion Windows application developed in C#.
The software interface features a chemical formula parser to automatically calculate molecular quantities from mass measurements. It displays results in comprehensible units ranging from septillions to individual molecules. Additional features including tare functionality, hold capability, and scale calibration were implemented to provide a complete laboratory-grade (ish) instrument.