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Author Topic: All ICT doubts here!  (Read 54834 times)

Offline Vin

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Re: All ICT doubts here!
« Reply #120 on: May 12, 2010, 03:47:56 pm »
Quote from: 7ood on May 11, 2010, 05:38:48 pm
can someone explain the burglar alarm system like what hardware and processing involved in that i need explanation of what is a microprocessor and how does it connect with other sensors in the burglar alarm

INPUT/HARDWARE .. Motion sensor , pressure sensor , Pressure pads ,light sensors , contact switches ,proximity sensors ..

PROCESSING : processor always monitors the input/environment , if any traces of pressure (on the plates) or movement or light or any vary in temperature .. micro processor sends a signal to an output device ..

OUTPUT : alarm light with alarm sound

 :)
..
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Offline BlackBunny103

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Re: All ICT doubts here!
« Reply #121 on: May 12, 2010, 03:56:51 pm »
Quote from: ~VIN1094~ on May 12, 2010, 03:47:56 pm
INPUT/HARDWARE .. Motion sensor , pressure sensor , Pressure pads ,light sensors , contact switches ,proximity sensors ..

PROCESSING : processor always monitors the input/environment , if any traces of pressure (on the plates) or movement or light or any vary in temperature .. micro processor sends a signal to an output device ..

OUTPUT : alarm light with alarm sound

 :)
..

Aww about to answer but you helped already :P
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Offline 7ooD

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Re: All ICT doubts here!
« Reply #122 on: May 12, 2010, 03:59:55 pm »
great answer dude :D
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Offline J.Darren

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Re: All ICT doubts here!
« Reply #123 on: May 12, 2010, 05:55:27 pm »
Quote from: ~VIN1094~ on May 12, 2010, 03:47:56 pm
INPUT/HARDWARE .. Motion sensor , pressure sensor , Pressure pads ,light sensors , contact switches ,proximity sensors ..

PROCESSING : processor always monitors the input/environment , if any traces of pressure (on the plates) or movement or light or any vary in temperature .. micro processor sends a signal to an output device ..

OUTPUT : alarm light with alarm sound

 :)
..
False. "Any traces" wold be insubmissable.

For instance if it is a five marks question, the model answer would be as follows.

- Microprocessor constantly monitors the analogue signal.
- Analogue signal is compared with preset value at real time.
- If pressure reading on the pressure pad is less than preset value, no action.
- If pressure reading on the pressure pad exceeds preset value, signal is sent to the output device.
- The output device in this case would be a silent alarm sent to the police (buzzer / light) - You can gain two marks by writing two different outputs.
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Offline Vin

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Re: All ICT doubts here!
« Reply #124 on: May 12, 2010, 06:03:54 pm »
 @ JHeroXHappy

i really appreciate tht u corrected me .. :)

thank u .. =)
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Offline J.Darren

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Re: All ICT doubts here!
« Reply #125 on: May 12, 2010, 06:11:42 pm »
Quote from: ~VIN1094~ on May 12, 2010, 06:03:54 pm
@ JHeroXHappy

i really appreciate tht u corrected me .. :)

thank u .. =)

No probs. Best of luck :)

First Language English and ICT on Friday, dang ...
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Offline Vin

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Re: All ICT doubts here!
« Reply #126 on: May 12, 2010, 06:14:52 pm »

I kno right .. studyin ICT is soo boring ..  :-\
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Offline J.Darren

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Re: All ICT doubts here!
« Reply #127 on: May 12, 2010, 06:17:01 pm »
Quote from: ~VIN1094~ on May 12, 2010, 06:14:52 pm
I kno right .. studyin ICT is soo boring ..  :-\
Somewhat, well I mean the key to success is to drill on the past paper Qs ... Gosh I lost two marks in Paper 2 for changing 0 and - 1 to Yes and No prior to importing the database :(
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Offline 7ooD

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Re: All ICT doubts here!
« Reply #128 on: May 12, 2010, 06:27:42 pm »

i have this repetitive question i need answer which i should directly write in the exam i dnt need explanation  big_smile

it is in may/june 2007 question 7 it says

7 A school in a cold country would like to grow tropical fruit. They want to use a computer
controlled greenhouse for this purpose.
(a) Name three sensors that they would need to use to measure the soil and growing
conditions.

i said
temperature sensor
light sensor
humidity sensor
my questions are

(b) Describe how three output devices would be used to control the growing conditions.
1
2
3

(c) Describe the computer processing which would be required to maintain the necessary
growing conditions.
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Offline J.Darren

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Re: All ICT doubts here!
« Reply #129 on: May 12, 2010, 06:48:26 pm »
7 A school in a cold country would like to grow tropical fruit. They want to use a computer
controlled greenhouse for this purpose.
(a) Name three sensors that they would need to use to measure the soil and growing
conditions.

i said
temperature sensor
light sensor
humidity sensor
my questions are

(b) Describe how three output devices would be used to control the growing conditions.
1 motor for shutting window - light sensor
2 water sprinkler - moisture sensor (notice that it does not have to be corresponding with the ans in part a)
3 air conditioner - temperature sensor

(c) Describe the computer processing which would be required to maintain the necessary
growing conditions.

Conditional :

- Microprocessor constantly monitors the analogue signal.
- Analogue signal is compared with preset value at real time.

Any three will do:

- If temperature is higher than preset value, turn on the fan.
- If temperature is higher than preset value, turn on the air conditioner.
- If temperature is lower than preset value, turn off the air conditioner.
- If light intensity is higher than preset value, shut the window.
- If light intensity is lower than preset value, open the window.
- If moisture level is higher than preset value, turn on the water sprinkler.
- If moisture level is lower than preset value, turn off the water sprinkler.
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Offline SEL123

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Re: All ICT doubts here!
« Reply #130 on: May 12, 2010, 07:33:59 pm »
ICT forum!!
Great!
I didn't even think this existed
I finished studying , just need some revision and a bit more practicing
Good luck everyone, the exam's on friday right?

What's new in our syllabus??
Other than blu-ray..
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Offline Vin

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Re: All ICT doubts here!
« Reply #131 on: May 12, 2010, 07:38:06 pm »

hey anybody minds briefing me about "the differences between batch processing, online processing and real-time processing."

jus wanna make sure .. =]
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Offline haris94

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Re: All ICT doubts here!
« Reply #132 on: May 12, 2010, 07:40:01 pm »
Quote from: SEL123 on May 12, 2010, 07:33:59 pm
ICT forum!!
Great!
I didn't even think this existed
I finished studying , just need some revision and a bit more practicing
Good luck everyone, the exam's on friday right?

What's new in our syllabus??
Other than blu-ray..

what about blue-ray do we need to know exactly?
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Offline princess12

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Re: All ICT doubts here!
« Reply #133 on: May 12, 2010, 07:43:03 pm »
what is the difference between verification and validation with the examples
 ??? ??? ??? answer me
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Offline haris94

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Re: All ICT doubts here!
« Reply #134 on: May 12, 2010, 07:44:39 pm »
Quote from: ~VIN1094~ on May 12, 2010, 07:38:06 pm
hey anybody minds briefing me about "the differences between batch processing, online processing and real-time processing."

jus wanna make sure .. =]

these should help u understand the differences
http://www.igcseict.info/theory/7_2/modes/index.html
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