Computers and Technology, 26.12.2020 17:50 Justadumbemo
An electronic pet flap is fitted with an RFID receiver to provide an automated security system that unlocks the pet flap as the animal approaches and locks it again once it has moved away. A unique collar worn by the pet is also fitted with an active RFID transponder.
a) The active RFID transponder worn by the animal is powered by a small battery. Why might a passive system not be suitable in this instance? [1]
b) Describe the principles of operation of the RFID system in locking and unlocking the pet flap. [3]
c) Suggest a potential problem with this system.
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