Meet the Enigma Machine Wrist Watch: a wearable device powered by an Arduino, featuring a tiny OLED screen and a LiPo battery. The case is made out of steel while the strap is made out of scrap leather. The developer also came up with the code for the Enigma.
The above video shows this interesting wristwatch in action. It just goes on to show what’s possible when you know your Arduino and coding. You can find out more about this watch here.