Unit 1-Digital devices.ppt
- 1. Personal Digital Devices GCSE ICT Unit 1 Theory
- 2. What digital devices can you think of? PERSONAL DIGITAL DEVICES Mobile Phones Personal computers Satellite Navigation Cameras/ camcorders Media players Games consoles
- 3. •Text messages (SMS) •Social networking sites •Instant messaging •Media messages (MMS) •Voice calls •Video calls •Email PERSONAL DIGITAL DEVICES
- 5. 1 Byte 1 Kilobyte 1 Megabyte 1 Gigabyte 1 Terabyte PERSONAL DIGITAL DEVICES
- 6. Mitch could use a DVD or CD drive to back up his video files. a) State one reason why DVD is more suitable Larger storage capacity b) Identify one local storage, other than a DVD or CD drive that could be used for backups Memory stick, USB flash drive PERSONAL DIGITAL DEVICES
- 7. Some digital devices store data on internal hard disk drives & others use SD cards. a) Give two advantages of using a hard disk drive rather than an SD card • Larger storage capacity • Faster data access b) Give two advantages of using an SD card rather than a hard disk drive • Smaller and lighter • Easily removable & can be used to transfer data between devices PERSONAL DIGITAL DEVICES
- 8. PERSONAL DIGITAL DEVICES Input Devices Output Devices Used to enter data into a computer Allows the user to see or hear the information once processed.
- 9. PERSONAL DIGITAL DEVICES Look at the following devices, are they Input, Output or Storage devices?
- 10. PERSONAL DIGITAL DEVICES Look at the following devices, are they Input, Output or Storage devices?
- 11. PERSONAL DIGITAL DEVICES 1) List two peripheral devices that could be connected to a personal media player Headphones, speakers, microphone 2) Jo has a new games console. State two input devices that she might use with it Webcam, microphone, controller, steering wheel, balance board
- 12. PERSONAL DIGITAL DEVICES Data Cable connection (USB) • Most common method • Most mobile phones & media players can connect by USB Bluetooth • Allow devices to connect wirelessly over short distances
- 13. PERSONAL DIGITAL DEVICES Wi-Fi • Allow devices to connect wirelessly over longer distances • Most modern devices are now Wi-Fi enabled Cloud • Allows users to store all their data on a remote server that can be accessed anywhere with internet
- 14. PERSONAL DIGITAL DEVICES Security – How can you keep the data safe? Hide the phone Set a password or PIN Lock the SIM card Restrict Bluetooth usage
- 15. PERSONAL DIGITAL DEVICES Who Am I? Look at the definitions, can you decide which personal computer the description is talking about? Desktop computers Laptop computers Netbook computers Tablet computers • I am very strong & robust • I boot up very quickly • I have no hard disk • I have SD cards as storage • I need input & output peripherals • Have hard disk drives & optical drives • I have a powerful processor • I am easy to upgrade & enhance Netbook computers Desktop computers
- 16. PERSONAL DIGITAL DEVICES Who Am I? Look at the definitions, can you decide which personal computer the description is talking about? Desktop computers Laptop computers Netbook computers Tablet computers • I have a monitor, pointing device & webcam built in • I have bluetooth & WI-FI built in • I have hard disk drives & optical drives • I am very light & portable • I am battery powered • I have a touch screen interface • I have WI-Fi, Bluetooth & 3G Laptop computers Tablet computers
- 17. PERSONAL DIGITAL DEVICES http://www.youtube.com/watch?v=_v2bwkjPjjk Health Risks Solutions Eye strain RSI Neck and back problems Pain in knees and legs - Take regular breaks away from screen - Adjust the screen - Use an anti glare screen - Use wrist rests - Take breaks - Change height of chair/screen - Move computer closer/further away - Make sure feet are flat on ground or use a foot rest - Take regular breaks
- 18. PERSONAL DIGITAL DEVICES 1) Some people find it difficult to use a mobile phone. State two features that can make a phone easier to use. Louder ring tone, clearer display, larger keys, touch keypad 2) Harry is concerned about data security. State two ways he can protect the information stored on his phone. Hide the phone in public, set a PIN/password, Lock SIM card, restrict bluetooth usage
- 19. PERSONAL DIGITAL DEVICES Resolution • The maximum number of pixels that can be recorded in the images • The more pixels, the more detailed the image Zoom • Digital Zoom – just enlarges part of the image which can become blurred • Optical zoom – moves the lens closer which allows a clearer image
- 20. PERSONAL DIGITAL DEVICES Many cameras now have a GPS receiver allowing the following: GPS Tagging • Stores the exact location of where a video/image was recorded Metadata • The small text file stored with each image giving its details
- 21. PERSONAL DIGITAL DEVICES Wireless transfer: • WI-FI • Bluetooth • Infrared HDMI Port – allows users to view HD movies on TV through HDMI cable Connectivity: USB Port – allows transfer of files with USB cable
- 22. PERSONAL DIGITAL DEVICES Small, light and easy to carry Key Features: Solid State Memory - the songs don’t skip when jolted Long battery life Hold a lot of media – songs, podcasts, video Simple interface
- 23. PERSONAL DIGITAL DEVICES Streaming – the file is sent in compressed form over the internet and is viewed in real time. Advantages of Streaming: • Saves time – doesn’t have to wait for download • Uses less storage space Disadvantages of Streaming: • Cannot keep a copy for viewing offline • Limited availability • Dependent upon connection quality
- 24. PERSONAL DIGITAL DEVICES High resolution output Key Features: CD, DVD and Blu- ray Connectivity – USB, Bluetooth, Wi-Fi, ethernet Capable of multi- player online gaming
- 25. PERSONAL DIGITAL DEVICES Overuse injuries - RSI Health Risks: Muscle & joint problems Obesity Eye strain
- 26. PERSONAL DIGITAL DEVICES Route planning Uses: Check speed & warn about speed cameras Live traffic reports Locate nearest service stations Function of GPS: gives you an accurate location of where you are by receiving signals from a network of satellites
- 27. PERSONAL DIGITAL DEVICES Using a smartphone app instead of dedicated sat nav: • Always likely to have mobile phone on you so will always have sat nav • Generally smaller and lighter • Might have to pay for expensive app • Using GPS runs the battery down quickly • Charges – internet usage
- 28. PERSONAL DIGITAL DEVICES Organisations now need a strong online presence due to the popularity of the use of digital devices: Blog – tell customers about developments Viral marketing – advertise through video uploads Profiling – tracking information about customer transactions How?
- 29. PERSONAL DIGITAL DEVICES How can technology be used in education: Internet – online research Interactive whiteboards – enhance learning experience Specialist software – improves learning in certain subjects Apps – helps make learning more fun VLEs – allow access to learning resources Ebook readers – access to texts
- 30. PERSONAL DIGITAL DEVICES 1) Demi likes to use her personal media player when she goes running. List two features of personal media players that make them suitable for this. (2 marks) Portable, use solid state memory 2) Modern games consoles are multi- functional devices. Apart from gaming, give two other uses for games consoles View HD movies using blu-ray drive, use internet to stream movies, internet for social networking
- 31. PERSONAL DIGITAL DEVICES Some people claim that playing video games is beneficial. Make a reasoned argument to support this point of view. (6 marks) ESSAY PRACTICE! Mental development – spatial awareness & attention span - Improve spatial awareness & hand-eye coordination Learning skills & specific subjects - Improve thinking, problem solving, reasoning & memory - Specialist games for subjects (History etc) Social skills - Multi player games Physical activity - Dance & fitness (Kinect, Wii) Staying safe - Prevents people from going out and getting into trouble