If you bought an old phone on the used marketplace, it might not be safe to use. Here's how to protect yourself.

First, the application. The Octo4a project lets you use an old Android phone as a 3D printer server, web interface, and even time-lapse camera to make those nice movies where the print seems to ...

The circuit to make two phones work as an intercom is extremely ... Possibly a unique use of the old hack. I was pleasantly surprised by my children’s reactions. I just installed this today ...