Microchip Makes on Twitter: "Part binary calculator, part binary clock, a whole lot of freeform circuitry! https://t.co/iohElUBiBR https://t.co/3CM2rIwczz" / Twitter
Binary-coded decimal - Wikipedia
bitcraft lab on Twitter: "BOBCAT: Ball Operated Binary Calculator and Tutor >>> http://t.co/oVtELXygad cc @rlfbckr http://t.co/Eot5Y732Hw" / Twitter