Interested to know how a card only needs to be in close proximity to send a signal to the terminal yet doesn’t appear to have any internal power of its own to send the signal? Could understand if contact was necessary to complete a circuit and data could transfer but don’t quite get how it can wirelessly send/receive data with no power source?
In: Technology
Energy is transferred from the reader to the card. There’s a circuit with an antenna and capacitor that absorbs energy from the radio waves and give the card enough power to do what it needs to do.
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