A Gardener wants to use a computer to monitor the growing conditions in his greenhouse.
(a) Name Three Sensors that he would need.
1. Moisture Sensor
2. Light Sensor
3. Temperature Sensor
(b) Explain why computers are unable to read the data directly from these sensors.
Computers use digital (1's and 0's) where as the sensors use analogue. Computers cannot understand
analogue as it only uses digital.
(c) What device is needed to enable the computer to read data?
An Analogue to Digital Converter (and Vice Versa)
(d) Give two advantages of using a computer to monitor the conditions rather than having it done by humans.
1. Measuring is more accurate on a computer as they can measure finer results and than humans.
2. Computers can be left on and can record constant results whereas humans must take breaks and can't record constant results.
A House has a burglar alarm system. Describe the Inputs, Outputs and Processing involved in such a system.
The Inputs required in a burglar alarm system would be a Motion System to detect movement in the area. Also, sound sensors would be used to detect noises in a close proximity. The Processes involved would be if a certain amount of movement is detected, a buzzer will go off. If too much sound is detected, a light will go off to signify this. The Output devices in the system would be a buzzer to let off sound to warn or alert you that there is too much movement. A Light would go off to show that two much sound is being sensed in the area.
(a) Name Three Sensors that he would need.
1. Moisture Sensor
2. Light Sensor
3. Temperature Sensor
(b) Explain why computers are unable to read the data directly from these sensors.
Computers use digital (1's and 0's) where as the sensors use analogue. Computers cannot understand
analogue as it only uses digital.
(c) What device is needed to enable the computer to read data?
An Analogue to Digital Converter (and Vice Versa)
(d) Give two advantages of using a computer to monitor the conditions rather than having it done by humans.
1. Measuring is more accurate on a computer as they can measure finer results and than humans.
2. Computers can be left on and can record constant results whereas humans must take breaks and can't record constant results.
A House has a burglar alarm system. Describe the Inputs, Outputs and Processing involved in such a system.
The Inputs required in a burglar alarm system would be a Motion System to detect movement in the area. Also, sound sensors would be used to detect noises in a close proximity. The Processes involved would be if a certain amount of movement is detected, a buzzer will go off. If too much sound is detected, a light will go off to signify this. The Output devices in the system would be a buzzer to let off sound to warn or alert you that there is too much movement. A Light would go off to show that two much sound is being sensed in the area.