In an attempt to remedy the harm of an always-on lifestyle, Brookhaven National Laboratory astronomy instrumentation engineer Justine Haupt stripped a mobile phone down to its essentials in order to assemble her handheld rotary cellphone. For the DIY invention, three years in the making, Haupt paired a rotary mechanism from an old Trimline telephone with a microcontroller and Adafruit Fona 3G cell transceiver. She then housed it all in a 3D-printed case. The “perfectly usable” phone makes and receives calls. Read more about it within Haupt’s interview with Wired.