This key facts covers Real-World Examples of Logic Gates within Logic Gates for GCSE Computer Science. Revise Logic Gates in 3.4 Computer Systems for GCSE Computer Science with 16 exam-style questions and 20 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 7 of 9 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Real-World Examples of Logic Gates
| Gate Type | Real-World Application | Logic Explanation |
|---|---|---|
| AND | Car starting system | Key inserted AND brake pressed → Engine starts (both conditions required) |
| AND | Microwave oven | Door closed AND Start pressed → Microwave runs (safety requirement) |
| OR | Home security alarm | Window broken OR Door forced → Alarm sounds (either triggers alert) |
| OR | Smart lights | Voice command OR Motion sensor → Light turns on (multiple triggers) |
| NOT | Refrigerator light | NOT(door closed) → Light on (light when door is open) |
| NOT | Automatic doors | NOT(obstruction detected) → Door closes (inverts sensor signal) |
Practice questions for Logic Gates
An AND gate has inputs A=1 and B=0. What is the output?
Complete the truth table for an OR gate with two inputs A and B. | A | B | Output | |---|---|--------| | 0 | 0 | | | 0 | 1 | | | 1 | 0 | | | 1 | 1 | |