This key-driven, manual verifier has 15 black rubber keys. Twelve are for the 12 columns on a punch card. These are labeled from 0 to 9, X, and blank. Two other keys move the card one space, and the ...

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If you’ve already started slipping on your New Year’s resolutions, you’re not alone — and the internet thinks it has a solution. Enter 2026 Punch Cards, a viral habit-tracking trend sweeping TikTok as ...

I built a card reader interfaced with a LCD and Microcontroller. It displays the name of the person on the LCD to confirm identity when a card is inserted. It’s a simple prototype of card identifiers ...