Question

An office has an automated lighting system. When movement is detected in the office the

lights are switched on. If movement is not detected for a period of 2 minutes the lights are
switched off. The system uses a sensor and a microprocessor.
Describe how the automated lighting system uses a sensor and a microprocessor.

Answer 1

Answer: Here.

Explanation: Microprocessor contacts with the motion sensor or basically any sensor according to its output type and supporting protocols , if it’s a digital sensor which means the output signal is a binary (parallel or serial) value then the microprocessor uses the peripheral interface protocols supported by this sensor and microprocessor like SPI or I2C .. etc.On the other hand if it’s an analog sensor which means that the output value is a voltage level then the microprocessor uses it’s Analog to Digital Converter (ADC) and reads this value and use it in any application ( the application here can be a sound signal for example).