2667186
Description
Mind Map by George Buck, updated more than 1 year ago
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Created by George Buck
over 9 years ago
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GCSE ICT WJEC
Unit 1
- Data validation
- Checking for errors
- The computer
checking data is:
- Sensible
- Within stated ranges
- Sensible
- Types of check
- Range checks
- Range checks
- Checking for errors
- Data Logging
and weather
forecasting
- Types
- Analogue
sensors
- Digital
sensors
- Can convert
analogue to
digital
- Analogue
sensors
- Weather
forecasting
- Data collected
- Temperature
/ thermistor
- Thermometer
- Thermometer
- Wind
speed
- Anemometer
- Anemometer
- Air
pressure
- Barometer
- Barometer
- Air
humidity
- Hygrometer
- Hygrometer
- Relative
humidity
- Wet and dry
thermometers
- Wet and dry
thermometers
- Rainfall
- Rain
gauge
- Rain
gauge
- Wind
direction
- Wind /
weather
vane
- Wind /
weather
vane
- Sunshine
hours
- Sunshine
recorder
- Sunshine
recorder
- Temperature
/ thermistor
- Data collected
- Types
- Control systems
- Device control
- One piece of equipment
controlling the operation of
equipment by sending to it.
- Equipment is usually
- One piece of equipment
controlling the operation of
equipment by sending to it.
- Device control
- Personal
communication
systems
- Fibre optic cable
- Works by transmitting
data as a series of
pulses along a thin glass
fibre. One bundle of
fibres is used to send
messages and a second
bundle carries messages
in the opposite direction
- Are good at
transferring data
because they are fast
and do not suffer
from interference
like metal cables.
- Broadband
- Very high
speed
digital lines
- Very high
speed
digital lines
- A router is a special
piece of hardware
which co-ordinates
the switching of
messages between
the computers and
the rest of the
internet
- Broadband
allows you to
be on the
phone whilst
on the internet
- Works by transmitting
data as a series of
pulses along a thin glass
fibre. One bundle of
fibres is used to send
messages and a second
bundle carries messages
in the opposite direction
- Wireless
media /
Radiowaves
- Microwaves
- Mobile phones use
microwaves. Ideal for
linking computers in
two separate buildings
fairly near each other.
Satellite systems also
make use of
microwaves.
- Mobile phones use
microwaves. Ideal for
linking computers in
two separate buildings
fairly near each other.
Satellite systems also
make use of
microwaves.
- Infra-red
- Short range
communications
- Key freatures are
- Robustness
- Low cost
- Low power
- Robustness
- Examples
- Wireless
mouse /
Keyboard
- Link from a
laptop
computer
to a printer
- Wireless
hands
free for
mobile
phones
in cars
- Wireless
mouse /
Keyboard
- Short range
communications
- Bluetooth
- Can only travel
short distances and
line of sight and this
limits their use
- TV
remote
control
- TV
remote
control
- Can only travel
short distances and
line of sight and this
limits their use
- Microwaves
- Mobile
phones
- Disadvantages
- Signal
cannot
be
recieved
- Limit
calls
- Low
battery
- Low
credits
- Low
battery
- Microwave
radiation that
comes from
the phone can
affect health
- Users can build
up large phone
bills using
internet service
- Can be a
nuisance is
they ring at
inconvenient
times
- Can be
an
incentive
for theft
- Signal
cannot
be
recieved
- Used for
- Speaking
to other
people
- Testing.
- Short
message
service
- SMS
- Short
message
service
- Photo /
Picture
messaging
- Other services
- M commerce
- GPRS
- Using
Wireless
Application
Protocol
systems
- Email
- Internet
- Email
- Speaking
to other
people
- Disadvantages
- Fibre optic cable
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