Swiping passwords

Today I ran across an interesting MakeZine project article that shows how to use an Arduino Leonardo and an RFID card reader to make a custom password entry gadget. According to the article, the cost was about $75.

$75?! I accomplished the same thing last year for about $16 … with no soldering and without modifying or damaging any hardware. (You can get the same parts today for closer to $11.)

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