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Door control system: Difference between revisions
From London Hackspace Wiki
→Cards that don't work as well
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=== Cards that don't work as well === | === Cards that don't work as well === | ||
* Contactless bank cards have more processing power on-board, and need quite a lot of RF energy to activate, so may not work as reliably as simpler cards like Oyster card or simple keyfobs. | * Contactless bank cards have more processing power on-board, and need quite a lot of RF energy to activate, so may not work as reliably as simpler cards like Oyster card or simple keyfobs. This is a known problem, that might be resolved by including a DC boost converter in the reader enclosure to make sure the reader gets a good 5V supply. | ||
* Passports with RFID chips will not work, and by attempting to use them will reset some internal read count in the passport, which may raise questions at border crossings. | * Passports with RFID chips will not work, and by attempting to use them will reset some internal read count in the passport, which may raise questions at border crossings. | ||
