Digital Logic & Binary
📋 What it is
Computers use binary (0s and 1s) and logic gates (AND, OR, NOT) to make decisions from on/off signals.
🗣️ Coach says
Deep down, electronics thinks in TWO states: on (1) and off (0) — binary. Logic gates combine these: an AND gate outputs 1 only if BOTH inputs are 1; OR needs just one; NOT flips it. Stack enough gates and you can build any decision a computer makes.
🧠 Memory hook
Binary = 0/1 (off/on). Gates: AND (both) · OR (either) · NOT (flip). Stack them → any decision.
😂 Giggle
What did the battery say on its birthday?
"I'm feeling fully charged today!"
😲 Whoa!
Everything a computer does — every game, photo and video — is built from just these simple on/off logic gates, stacked billions of times.
✅ Quick check: An AND gate has two inputs. When does it output a 1?
Say your answer out loud first — then reveal.
Only when BOTH inputs are 1; any 0 makes it output 0.
AND requires all inputs true to output true.
🧪 Try it! (2 minutes)
Play "AND": both hands up = 1 (yes); either hand down = 0 (no). Try OR (either hand up = yes).