The second kit in the Hardware Basics series. We build from transistors what every processor counts with — the adder: from one bit to eight, negative numbers and subtraction, the C, Z, N, V flags, comparison and a signed calculator. Bonus: decimal math, as in pocket calculators. A standalone kit that starts from the transistor. 1,208 transistors.
This kit is free: all lessons are open, no sign-up needed.