The right business card can leave a good impression, however after a while they can all start to look the same. You could always make a PCB card with a working circuit, or for something different create your own hand-held business card printer in the same manner as Instructables user Thingking has done.
By using a small Arduino-compatible board with an inexpensive thermal printer (and a hidden battery pack!) you can quickly print out a card of your own design. Although it won't last long being on thermal paper, it gives you a point of difference and would be a fun way to share your details with others at hackerspaces and other social events.
For more instructions on how to make your own, visit the project Instructable. And for more, we're on facebook, Google+, and twitter - so follow us for news and product updates as well.
Apart from being one of the smallest Arduino-compatibles on the market with USB, it also has an onboard RGB LED and piezo which can be used a knock sensor and various tune and sound effects. Plus you can add extra circuitry with the matching protostick! For more information and to order, click here.