Input Devices

Input Devices:

Input Devices - Uses, Advantages and Disadvantages By Praveen, Jason & Tom

Slide 2:

Touch Screens Magnetic Strip Readers Smart Card Readers Chip and PIN Readers Scanners Digital Cameras Microphones

Touch Screens:

Touch Screens Touch Screens are an Input Device where the user simply touches the screen with a finger or stylus to input data. Touch Screens are used in a range of device including PC’s, ATM machines, tourist information kiosks, interactive whiteboards and mobile phones.

Touch Screens – Advantages & Disadvantages:

Touch Screens – Advantages & Disadvantages Advantages : It is easier and faster to select options on a touch screen than a mouse. Easier for people with disabilities. Users often feel touch screens are more fun to use. They feel more connected to the device. Disadvantages Typing is much slower on touch screens.

Touch Screens:

Touch Screens

Magnetic Strip Readers:

Magnetic Strip Readers A Magnetic Strip Reader simply reads information from magnetic strips found on the back of plastic cards. These are used anywhere a payment is made, such as ATM’s, EFTPOS terminals. Also used for security to prevent unauthorised access to buildings or hotel rooms.

Magnetic Strip Readers – Advantages & Disadvantages:

Magnetic Strip Readers – Advantages & Disadvantages Advantages Data entry is a much more faster, accurate and secure than with a keyboard. Prevents access to restricted areas without a card (e.g. hotel room) Disadvantages If the strip is damaged then data has to be entered manually, resulting in a loss of speed and efficiency. If the strip is damaged or if the card is lost the holder cannot gain access to the hotel room or building.

Magnetic Strip Readers:

Magnetic Strip Readers

Smart Card Readers:

Smart Card Readers Smart Cards are similar to a magnetic strip card, except data is stored on a chip rather than a magnetic strip. Smart Cards are used as payment cards (e.g. phone cards), loyalty cards, identification cards, and public transport cards. Also used in modern passports.

Smart Card Readers – Advantages & Disadvantages:

Smart Card Readers – Advantages & Disadvantages Advantages Data on the chip can be updated instantly thereby preventing fraud. The cards don't need to be in contact with the reader so it receives less damage through regular use. Data entry is more secure than a magnetic strip. Disadvantages If the cards is lost the owner risks losing all the money on the card Since a lot of information is stored on the card – if the card is stolen, hackers can use it for fraud and identity theft

Smart Card Readers:

Smart Card Readers

Chip & PIN Readers:

Chip & PIN Readers These are mostly found in EFTPOS terminals. The combined PIN pad and chip reader doesn’t have a magnetic strip reader. This device will have a slot for inserting the chip card manually, with a key pad for inserting the PIN and instructions for the rest of the transaction. The Chip and PIN readers will have account information along with the PIN code. A Chip of PIN reader can be used wherever payment needs to take place e.g. supermarkets

Chip & PIN Readers – Advantages & Disadvantages:

Chip & PIN Readers – Advantages & Disadvantages Advantages They allow a secure transaction to take place, using the PIN. The transaction is instant, rather than cheques. Chips are more robust than magnetic strips Disadvantages Forgotten PIN means no transactions Needs to be secretive in protecting their PIN code.

Chip & PIN Reader:

Chip & PIN Reader

Scanner:

Scanner Scanners enter hard copy images into the computer. The most common type of scanner is the flatbed, this is where the user places the document on a flat glass panel then closes the lid. Then sensors and lights move under the document producing a scanned image. If the document that is being scanned is text, the scanner can also be used with optical character recognition (OCR) software. This will reproduce text suitable for other software such as word publishing software or spreadsheets. Also another type of flatbed scanner is used to read barcodes used in shops and supermarkets.

Scanner – Advantages & Disadvantages:

Scanner – Advantages & Disadvantages Advantages Scanners allow images to be stored for further editing. Using OCR on printed documents save time instead of typing it again Using a barcode scanner is quicker than typing out the barcode Disadvantages The accuracy of reproduction is limited

Scanner:

Scanner

Digital Camera :

Digital Camera A digital camera is a camera that takes video or still photographs, or both, digitally by recording images via an electronic image sensor. They can do more than film cameras can do, for example displaying the image on the camera screen directly after a shot is taken and also connecting to the computer directly. They can also be much more compact than film cameras.

Advantages & Disadvantages:

Advantages & Disadvantages Advantages : Digital cameras produce better quality images than older cameras with a film. It is quicker to upload pictures to the computer, rather than scanning them. Digital Cameras can connect directly to the computer for editing and storage via USB or SD Card A memory card can hold more images than a roll of film Disadvantages : More expensive than traditional cameras Batteries need charging / replacing more than older cameras Harder for people with disabilities as there are many buttons Possibly confusing for older people

Digital Camera:

Digital Camera

Microphone :

Microphone They are connected directly to the computer and are used to input sounds. They have a sensor which can change sound vibrations into an electrical signal. Microphones are used in many applications such as telephones, tape recorders, karaoke systems, hearing aids, motion picture production, live and recorded audio engineering, FRS radios, megaphones, in radio and television broadcasting and in computers for recording voice, speech recognition and VoIP.

Advantages & Disadvantages:

Advantages & Disadvantages Advantages : Changes to voice and sound can be done in real time rather than editing it later Quicker to input by voice than by typing Disadvantages : Voice recognition software is not as accurate as a keyboard because of accents, background noise and can actually take a long time to correct mistakes The input is used for all things, so it can only be used for one purpose at a time.

Microphone:

Microphone

Summing Up...:

Summing Up... Touch Screens - Inputs data by simply tapping options on the screen. Magnetic Strip Readers - Reads information off magnetic strips found on plastic cards. Smart Card Readers - Reads information off Smart Cards where data is stored on a chip. Chip & PIN Readers - Reads information off payment cards that contain chips. Requires a PIN to access data.

Summing Up...:

Summing Up... Scanner - Optically scans images, text and converts it to a digital image. Digital Camera - Takes video and/or still photographs, digitally by recording images via an electronic image sensor. Microphone - Connects directly to a computer and used to input sound. Done by converting analogue signals to digital signals.

Questions?:

Questions?