Topic 1 - Personal Digital devices
- Created by: chelsea todd
- Created on: 30-04-17 17:22
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- Topic 1 - Personal Digital devices
- 1.1) Mobile phones
- Mobile phones were originally developed to allow users to make voice calls on the move
- Later, people were able to send short text messages via. SMS
- Todays smart phones are known as 'multifunctional'
- Common features of the modern phone include...
- SMS - to send text messages
- Camera - still images and video
- bluetooth - allows data to be exchanged over short distances
- Wifi - to exchange data, signal can travel long distances
- Mp3 player- to listen to music files
- GPS- can pinpoint your location using satellite
- Games or apps- software for entertainment or practical uses
- Responsible use of mobile phones
- Recycle old phones- help the environment
- Don't take someones photo without permission
- Don't use a mobile phone while driving
- Don't send abusive text messages
- Don't overuse
- Security of mobile phones
- Lock the Sim card
- Set up a PIN, Password or bio metric lock
- Record the unique IMEI number
- Restrict Bluetooth useage
- GPS
- GPS receivers use the data to calculate the users exact geographic location
- Smart phones now have the ability to 'tag' a photo or video by adding GPS data to it.
- Geo tagging involves applying longitude and latitude coordinates to a video or photo
- Mobile phones in different areas of the world operate on different frequencies
- If users want to use a mobile phone abroad, they need to use a Dual band, tri band or Quad band
- Mobile phones were originally developed to allow users to make voice calls on the move
- 1.2) Personal Computers
- Types of computer - select a computer that meets the needs based on functionality, weight and cost
- Desktop computers
- Heavy. designed to stay in one place
- Useful in an office environment
- Need input and output peripherals
- Powerful processors
- Easy to upgrade and add extra functions to enhance
- Laptop computers
- monitor, pointing device and webcam built in
- Portable- light enough to be carried around
- Battery powered or can use an electricity supply
- Useful for students
- Built in Wi-Fi and bluetooth
- Less easy to dismantle and upgrade
- Netbook computers
- Strong and robust
- Small and lightweight
- Designed for using the internet
- Boot up quickly because they have solid state SD cards as storage devices
- Tablet computers
- very light and portable
- Touch screen interface
- Virtual on screen keyboard
- Designed for playing media, internet use and reading ebooks
- Desktop computers
- Parts of a computer
- CPU - This part processes calculations. speed is measured in GHZ
- Hard drive- Software and data are stored in the computers hard drive. Measured in Gigabytes
- Memory - The computer uses memory to run applications. RAM is temporary and data can be lost
- Graphics card- A good one allows the system to to display high quality images, video and games.
- What to consider when buying a new computer?
- Battery life RAM Storage Processor speed
- Peripherals
- Input devices- Allow the user to input data into computer
- Output devices- Allow the user to hear, view or print processed data
- Storage devices - Allow user to store data so it can be used again
- Types of computer - select a computer that meets the needs based on functionality, weight and cost
- 1.3) Cameras and Camcorders
- Features of a Camcorder
- GPS tagging
- LCD screen- viewfinder for playback
- Lightweight and portable
- Internal hard drive or memory card
- Shockproof
- WI- Fi for uploading
- Features of a Digital Camera
- Takes still images
- some have GPS built in
- most have a Zoom feature
- stores image on a memory card
- DSLR cameras- bigger but have more features
- Download straight to PC
- Resolution and Zoom
- Digitial Zoom- Just crops and enlarges part of the image
- Optical Zoom- Moves the lens away from the sensor closer to the subject, bringing light from subject closer
- Images are made up of pixels- a tiny point of an image
- More pixels, more detailed the image
- Features of a Camcorder
- 1.4) Media players
- Key features of media players
- Small, light and easy to carry
- Long battery life
- can set playlists
- can lock to prevent accidental activation
- Uses solid state memory so songs don't skip when jolted
- Security features
- Uses anti-virus software
- Hard reset feature to allow users to delete data
- Encrypts data to prevent others accessing it
- Remote management (deactivation) allows you to remotely deactivate if stolen
- Downloading and streaming
- Most users download audio or video to store and play on their media players
- If the device has Wi-fi the user can stream media- the file is sent in compressed form over the internet and displayed by viewer in real time. Eg. YoutTube
- Adv- Uses less storage space.
- Disadv-Cannot keep a local copy for viewing online
- Disadv- user experience is dependent upon connection
- Key features of media players
- 1.1) Mobile phones
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