add

@see The Tiniest Decimal Digit Display and Adder

I'm happy to present you this time a rather useful creation of mine. It's a 3x5x6 big decimal digit display. Not only it's a digit display but also has the ability to add a number in the range 1-9 to it's value. Thus if it displays 5 and you add 7 to it it will show 2 and a carry output will...