An introduction to the Arduino microcontroller, designed to be welcoming and fun for crafters and makers. I write about Arduino projects on http://www.girlwritescode.com/ and http://lostechies.com/sharoncichelli/ (as well as other tech), and I post my code on GitHub at https://github.com/scichelli/Arduino-Sketches. The Clank, specifically, is https://github.com/scichelli/Arduino-Sketches/blob/master/GirlGeniusClank/GirlGeniusClank.ino.