So in that light, building your own DIY calculator might not seem too exciting. But we can’t deny this Arduino calculator project by [Danko Bertović] would look good sitting on the bench.

Using a CNC machine, the calculator has been constructed using a wooden case together with acrylic screen protector, and a little Arduino hardware. Featuring an Arduino Nano microcontroller board ...

This is the SB116, an 8-bit programmer’s calculator powered by an Arduino Nano. It features a 128 x 64 pixel monochrome OLED display and can be powered by either a USB port or three AAA batteries.