Functional business card designed by Ricardo Daniel de Paula doubles as a fully operational miniature computer keyboard.

Developed on a custom PCB, business card features a capacitive touch interface that functions as a small keyboard when connected via USB-C.

Keyboard Business Card serves as a practical peripheral device and as a tangible demonstration of compact circuit design with capacitive sensing.

Most people hand out paper business cards. Ricardo Daniel de Paula hands out a working computer keyboard. It plugs into USB-C and types.

Forget glossy paper. Ricardo’s business card has a microcontroller, capacitive touch sensors, and USB-C.

Every engineer dreams of turning an idea into hardware. Ricardo turned his business card into a working computer keyboard.

If you are tired of people throwing away business cards, build one they will never forget…

Cool business card you can actually use, a piece of functional tech that blurs the line between personal branding and engineering ingenuity.

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