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Tom Ward, whose work will appear in The Best of Instructables book we’re currently editing, has just posted an awesome new “extreme business card.” It uses a matrix of 5×15 0603 LEDs driven by a PIC16F57 MCU. He says you can get the parts cost down to about $5 each in quantity. Not the kind of card you’d give out on street corners, but if you *really* want to impress somebody…

Dot Matrix Business Card

Gareth Branwyn

Gareth Branwyn is a freelancer writer and the former Editorial Director of Maker Media. He is the author or editor of a dozen books on technology, DIY, and geek culture, including the first book about the web (Mosaic Quick Tour) and the Absolute Beginner’s Guide to Building Robots. He is currently working on a best-of collection of his writing, called Borg Like Me.


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