Builders · Ages 10–13· 4-bit

Logic: Machines that Decide

A logic gate takes bits in and gives one bit out, following a simple rule. Play with every kind of gate, then connect five of them into a circuit that adds numbers, exactly as the chip in a calculator does.

2 lessons 21 min 105 XP

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Lessons

1🔀AND, OR, NOTA logic gate applies one simple rule to its input bits. A truth table lists everything it can do.10 min50 XP
2➕Gates that addAn XOR and an AND add two bits. Chain those circuits and you can add numbers of any size.11 min55 XP