Computers and the Internet have dramatically expanded the information available at our fingertips. Then again, the fact that monitors are generally configured in a landscape orientation can be cumbersome for viewing PDFs and similar documents. Though you could permanently park a monitor in portrait mode, this isn’t always ideal for one’s normal workflow.
Bob from Making Stuff now has a solution, a monitor setup that uses a rack and pinion gearset powered by a stepper motor and a lazy susan bearing to allow one of his monitors to rotate with the click of a button. It also takes care of the needed Windows configuration changes.
To accomplish this, he used an ATmega328 with a bootloader to control the device, though he notes that a Nano would work just as well, and make things simpler to build. Now he can read docs page-by-page, then switch back to landscape mode at ease!