Locking your Android smartphone with a password, PIN or unlock pattern is your first defense against those who would use it for malicious purposes like stealing your info or sending joke texts to your ...

The Slic Pin (for Self-Locking Implanted Cotter) secures and self-locks through an implanted plunger (locking detent) that functions as a self-contained cotter pin. The Slic Pin (for Self-Locking ...

This simple code lock circuit described here is of an electronic combination lock for daily use. It responds only to the roght sequence of four digits that are keyed in remotely. If a wrong key is ...