Open-source project offers a low-cost, customizable alternative to expensive graphics calculators

Key points

• Graphics calculators remain surprisingly expensive despite using outdated technology.
• A new project called "NumOS" allows users to build their own high-functioning calculator using affordable, off-the-shelf hardware (the ESP32-S3).
• The system includes advanced features like symbolic differentiation, integration, and a display that renders math equations exactly as they appear in textbooks.
• Because it is open-source, the device is fully customizable for those who want to tinker with the software and hardware.
• These DIY devices are unlikely to be permitted in formal exam settings due to strict school policies.

This project challenges the high price point of standard educational calculators by providing a powerful, transparent, and affordable alternative for students and hobbyists. It highlights how modern, inexpensive microcontrollers can outperform legacy devices that have dominated the market for decades.