Direct data and entry device
• Also input device
• Like sensors, do not require human to control them
• Often be used for large amount of data
Chip and PIN reader:
Uses of chip and PIN reader:
• Transact money
• Use in ATM/stores
Advantages of Chip and PIN reader:
• High security
• Fast and quick
Disadvantages of chip and PIN reader:
• PIN codes can be seen when enter
• You can forget the PIN code
Magnetic stripe readers:
• Read magnetic data on a card
Uses of magnetic stripe reader:
• (old) ATM and credit cards, hotel key cards.
Advantages of magnetic stripe reader:
• Simple to use
• Cheap
• Very fast
Disadvantages of magnetic stripe readers:
• Can’t store many data
• Data can be lost – magnetic fields
• Less durable
• Fraud: readers and writers can be brought and use by anyone
RFID reader:
• Passive RFID reader: is versatile, can be used in many ways
Uses of RFID readers:
• Dog’s chips
• Apple pays
• Clothing security tags
Advantages of RFID readers:
• Work within a few meters of antenna
• Scan multiple tags
• Can write data into tags
• Versatile
Disadvantages of RFIB readers:
• Limited range
• No authentication (password/secure)
• Effect by electrical interference
QR scanners and bar code readers:
Advantages of QR scanners and bar code readers:
• Can contain lots of data
• Versatile – many purposes.
o E.g.: bank transfer
• Can be scanned from any direction meaning easier to read
Disadvantages of QR scanners and bar code readers:
• Need a device with a scanner app
• Can easily be fraudulently as they become more common
OCR and OMR:
OCR- optical character reader:
Advantages of OCR- optical character reader:
• Fast
• May avoid typing atom
• Cheap
Disadvantages of OCR- optical character reader:
• Unreliable
• Needs manual checking
OMR – optical mark recognition:
Advantage of OMR – optical mark recognition:
• Fast
• More accurate
Disadvantages of OMR – optical mark recognition:
• Paper needs to be align correctly
• Damaged/dirty papers could be misunderstood
• Marked only
