O-LevelComputer ScienceAutomated and emerging technologies2210/12 · May/June 2018 · Q116 Marks
A factory uses a security system to control a security light. The system uses a sensor and a microprocessor. Explain how the security system makes use of the sensor and the microprocessor to control the security light.
- A factory uses a security system to control a security light. The system uses a sensor and a microprocessor. Explain how the security system makes use of the sensor and the microprocessor to control the security light.[6]
Mark scheme
Marking points from the official mark scheme (May/June 2018). The mark or mark type is shown in brackets.
- [1] Suitable sensor (motion/infra-red)
- [1] Data converted (from analogue) to digital (using ADC)
- [1] Data sent to microprocessor
- [1] Data is compared to stored value/range ...
- [1] ... if data matches/out of range data security light turned on ...
- [1] waits for suitable period/until no motion detected ...
- [1] light turned off
- [1] Continuous loop/process
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