All by itself, a calculator based on an Arduino isn’t necessarily very novel ... We’d love to see an option to replace the LED with an LCD and maybe even some different CPU options, as ...

Featuring an Arduino Nano microcontroller board and the keyboard from a small numeric keypad the LCD display the calculator is powered by a set of AA batteries through a DC-to-DC converter.

[Usmar A. Padow] put together an Arduino Uno, SD card, four line character LCD, and PS/2 keyboard. but he’s also included alternative options to go without an LCD screen by using a computer ...