Once the code is uploaded to the BlinkM, you essentially have a micro Arduino running at 8MHz with a built in LED and 2 I/O lines (5 if you snip off the LED).

When you read “Arduino wristwatch”, you fall into the trap of envisioning an Arduino UNO clumsily strapped to someone’s wrist. [Marijo Blažević’s] creation is much more poli… ...

Arduino provides a very gentle introduction to microcontrollers for hobbyists and artists, so saving that extra $1 and using a Cortex M0 is not that big a deal.

Here's another tome worthy of the Gadget Master library: Arduino for Arduinians, written by John Boxall and due out next month. Here's another tome worthy of the Gadget Master library: Arduino for ...