The device acts like an old commercial model, the Datong D70, although it can optionally accept an LCD screen, something the D70 didn’t have. You can see the project in operation in the video below.

This Arduino BASIC interpreter will make a really fun one-day project if you’ve already got the parts on hand. [Usmar A. Padow] put together an Arduino Uno, SD card, four line character LCD, and ...