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A garden floodlight system uses inputs from sensors and switches to decide whether it should be turned on - OCR - GCSE Computer Science - Question 4 - 2023 - Paper 2
Question 4
A garden floodlight system uses inputs from sensors and switches to decide whether it should be turned on. The table shows the inputs into the system and the meanin... show full transcript
Worked Solution & Example Answer:A garden floodlight system uses inputs from sensors and switches to decide whether it should be turned on - OCR - GCSE Computer Science - Question 4 - 2023 - Paper 2
Step 1
Draw a logic diagram for the floodlight.
Answer
To create a logic diagram for the floodlight, we need to consider the conditions under which the floodlight (Q) is activated:
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Inputs Required:
- Motion sensor (A) must detect motion (Input 1)
- Light sensor (B) must indicate it is nighttime (Input 0)
- Light switch (C) must be ON (Input 1)
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Logic Gates Used:
- Use an AND gate to combine the outputs of the motion sensor (A), the light switch (C), and a NOT gate for the light sensor (B) to signify nighttime.
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Flow of Logic:
- Connect the output of the Motion sensor (A) to one input of the AND gate.
- Connect the output of the Light Switch (C) to another input of the AND gate.
- Connect the output of the Light sensor (B) through a NOT gate to the AND gate (indicating nighttime).
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Final Output:
- The output of the AND gate will be Q, which signifies whether the floodlight is on or off.
Step 2
Step 3