Ricardo Daniel de Paula is an engineer. But like every working person in the world, he's actually into sales. He's selling himself to prospective employers and this business card is an ingenious way to immediately stand out among his competitors in the job market as an inventive and skilled engineer.
At Hack A Day, de Paula describes how he designed and built this PCB board with a USB-C interface that turns this business card into a peripheral keyboard. It demonstrates capacitive touch technology, which is one of de Paula's specialties, and is inexpensive enough that, in limited numbers, de Paula can give it away.
-via Nag on the Lake
"TOTAL: 1.50$ USD in Components"