[Fabio Varesano’s] new Arduino compatible board packs a full power punch in a ultra compact layout, measuring at 20.7×15.2 mm, the Femtoduino is probably the smallest 328 based Arduino c… ...

Naturally, this isn’t the first tiny Arduino we’ve seen. If you are an ARM fan, there’s some little bitty cards for it, too, although not quite as small as DIL-Duino.

The small Arduino development board offers a fantastic alternative to the larger form factor of the Arduino Uno and even the Arduino Nano. Specifications of the Atto are listed below and the board ...

But it's possible to go even smaller, as the makers of a new Arduino-compatible product called "Microduino" show. At 1" × 1.1", it's nearly as small as a quarter.

News DigiSpark: What Arduino Would Be if It Were the Size of a Quarter By Cassandra Khaw Aug 14, 2012 11:57 am PDT [Credit: Erik Kettenburg/Kickstarter] ...

What do you do if even the smallest Arduino boards (or their clones) are too big for your homebrew project? If you're Johan Kanflo, you find a way to make them even smaller. His AAduino project ...

I'm a big fan of the Teensy, which is both a lot smaller than standard Arduino and (in the current version) a lot more powerful and easy to program. Not quite this small. But it retains USB ...