Yes, you can actually make cell phone calls with your Arduino now. The real star of this build is the new GSM Shield library.

Have an ancient cell phone sitting around? Tinkernut shows you how to make use of it by turning it into a smartwatch with an Arduino brain.

Tronixstuff has a borderline insane tutorial series going, and as of now, 27 chapters have been published. It's essentially the Arduino Bible, but the two most recent additions in particular have ...