While most microcontroller powered business cards opt for something small and cheap, [Brian] is going in an entirely different direction. His business card features an ARM processor, some Flash storage, a USB connection, and enough peripherals to do some really cool stuff.
This is the second iteration of [Brian]‘s business card. We saw the first version, but this new version makes up for a few mistakes in the previous version. The biggest improvement is the replacement of the Molex USB plug with bare traces on the board. [Brian] couldn’t find a board house that could fab a board with the proper thickness for a USB plug, but a few strips of masking tape did enough to beef up the thickness and make his plug nice and snug. Also, the earlier version had a few pins sticking out of the board for programming purposes. This wasn’t an idea solution for a business card where it would be carried around in a pocket, so these pins were replaced with a connectorless programming adapter. Just a few exposed pads gives [Brian] all the programming abilities of the last version, without all those prickly pins to catch on clothing.
With his new business card, [Brian] has an excellent display of his engineering prowess and a very cool toy; he has a project that will turn this card into a keyboard emulator, randomly activating the Caps Lock button for a few seconds every few minutes. A great prank, and a great board to give to future employers.