Personal Digital Devices Flashcards
(32 cards)
Factors to consider when buying a digital device:
- battery life
- connectivity
- compatibility
- purpose
- storage
- cost
- size
- security
Processor
It controls all the functions of the device
Internal memory
While the microprocessor is working, it needs to store the program instructions and data in its internal memory. Different devices have different amounts of memory- measured in bytes.
Flash memory
Type of peripheral ideal for portable digital devices
- doesn’t lose memory when turned off
- no moving parts so cannot be damaged (solid state)
- it is removable and so can be transferred between devices.
Types of flash memory
- USB stick (256Gb)
- SD card (4Gb)
- SDXC card (2Tb)
The bytes
1 byte 1 kilobyte = 1000 bytes 1 megabyte = 1000 Kb 1 gigabyte = 1000 Mb 1 terabyte = 1000 Gb
The 3 peripherals
Input devices
Output devices
Storage devices
Input devices
- mouse
- keyboard
- webcam
- game controller
- scanner
- joystick
- microphone
Output devices
- docking stations
- headphones
- printer
- headset
- screen
Connectivity
When digital devices are able to connect and share data
Data cable connection
USB Cable e.g most mobile phones can connect by USB cable to a computer
Bluetooth
A technology allowing devices to communicate with each other wirelessly.
Communicate over short distances using radio waves.
What is WI-FI?
WI-FI is a method of wireless communication using radio waves.
Can communicate over longer distances.
Allows devices to connect with a computer network and the Internet.
What is synchronising?
When 2 devices are connected and they can automatically exchange data.
Cloud synchronisation
If you download something on one of your devices, it will automatically download to all your devices. This saves you having to sync all yr devices with the computer.
Convergence (of mobile phones)
When a phone (smartphone) can perform the functions of other devices
Examples of what is on a multifunctional phone:
- Camera
- entertainment e.g. can play music and games.
- GPS receiver
- Internet
Network band
Mobile phones in different areas of the world use different network bands. If users want to use their device abroad they will have to have a dual band, tri band or to cover the whole world, a quad band phone
How to keep your phone secure
- set a pin / passcode
- lock the SIM card
- restrict Bluetooth usage
- use Touch ID
Responsible use of mobiles
- recycle old phones
- don’t take photos without someone’s permission.
- don’t overuse
- don’t send bullying messages
- don’t use mobile whilst driving
Why would you want a desktop computer?
- powerful processor
- good connectivity
- can have Bluetooth and wifi cards fitted
- easy to upgrade and enhance
- has hard disk drives
Why wouldn’t you want a desktop computer?
Need input and output peripherals
Not portable
Adv. of laptop computers
Webcam built in Has hard disk drives and optical drives Bluetooth and wifi built in Good connectivity Reasonably portable
Disadvantages of laptops
Battery powered
Less easy to dismantle and upgrade
