Before you build a CPU
by Froga
The handful of ideas that make the Build a CPU lab make sense: what a truth table is, how counting works with nothing but on and off, and why adding two bits needs two digits. Ten minutes.
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Study material
Each switch doubles the number of possibilities: one switch has 2 states, two switches have 4, three have 8. The pattern continues.
Four switches, each either on or off. How many different patterns can they make between them?
multiple choice
8
16
4
32
Two possibilities for the first switch, and for each of those, two for the second…
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