Each year millions of old smartphones are either tossed ... sized bit of perfboard. With modern phones without removable batteries simultaneous USB/audio dongle and charging usage via the USB ...

The Octo4a project lets you use an old Android phone as a 3D printer ... Most 3D printers are designed to run on USB anyway, so connecting it to the phone is as simple as buying a USB OTG cable.

Turn an old phone into a NAS for own storage network with a USB-powered storage drive. Learn how Android or iOS works by ...