1.Design a block diagram for an alarm that triggers if a door is open AND either a window OR motion is detected.
2.Convert this block diagram to a logic diagram: [Switch A] → [OR Gate] ← [Switch B] → [AND Gate] ← [Power] → [Light].
3.How can AND and NOT gates control a traffic light that turns green only if a sensor is off AND a timer is on?
4.Design a system where a fan runs if it’s hot OR humid, but NOT both. Draw the block diagram.
5.Create a logic diagram for a system where a bell rings if either a teacher OR student is present, but NOT if both are.
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1.
Answer: [Door (A)] → [AND Gate] ← [OR Gate] ← [Window (B)]
← [Motion (C)] → [Alarm]
Description: Combining AND and OR gates in a block diagram tests multi-gate logic application, simulating real-world security system design.
← [Motion (C)] → [Alarm]
Description: Combining AND and OR gates in a block diagram tests multi-gate logic application, simulating real-world security system design.
2.
Answer: A──┐OR──┐
B──┘ AND → Light
C──┘ (C=Power)
Description: This advanced conversion combines OR and AND gates, reinforcing symbolic logic and system flow understanding.
B──┘ AND → Light
C──┘ (C=Power)
Description: This advanced conversion combines OR and AND gates, reinforcing symbolic logic and system flow understanding.
3.
Answer: [Sensor (A)] → [NOT Gate] → [AND Gate] ← [Timer (B)] → [Green Light]
Description: This real-world problem uses NOT and AND to model traffic control, enhancing practical application and system design skills.
Description: This real-world problem uses NOT and AND to model traffic control, enhancing practical application and system design skills.
4.
Answer: [Hot (A)] → [OR Gate] → [AND Gate] ← [NOT Gate] ← [NAND Gate] ← [Hot (A)]
[Humid (B)] ───────────────┘ ← [Humid (B)] → [Fan]
Description: This complex design uses OR, AND, NOT, and NAND to model an exclusive OR (XOR)-like condition, challenging students to optimize logic.
[Humid (B)] ───────────────┘ ← [Humid (B)] → [Fan]
Description: This complex design uses OR, AND, NOT, and NAND to model an exclusive OR (XOR)-like condition, challenging students to optimize logic.
5.
Answer: A──┐OR──┐
B──┘ AND → Bell
NOT──┐
A──┐NAND──┘
B──┘
Description: This simulates an XOR scenario using basic gates, testing students’ ability to solve nuanced real-world problems with Boolean logic.
B──┘ AND → Bell
NOT──┐
A──┐NAND──┘
B──┘
Description: This simulates an XOR scenario using basic gates, testing students’ ability to solve nuanced real-world problems with Boolean logic.
Ruwan Suraweera Changed status to publish
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