🔐 Arduino Keypad Door Lock System A simple and effective security system using Arduino Uno, a 4x4 matrix keypad, and a relay-controlled electric lock. This project allows you to unlock a door using a ...

This is a simple Arduino-based door lock system using a keypad and an I2C LCD. The system supports a 10-digit master password for administrative access and a 4-digit user password for normal door ...

What is Lock Code? What does Lock Code mean? We explain in this detailed glossary defintion for Lock Code.

Forget keys! The best smart locks we've tested are secure, easy to install, and provide several convenient ways to control who can access your home and when.

Stop using the same login credentials everywhere. The best password managers we've tested create a unique and strong password for each of your online accounts and alert you to potential data leaks.

Everyone should use a password manager, and after researching dozens and testing six, we recommend 1Password because it’s secure and easy to use.

A good smart lock should offer a combination of security, aesthetics, and convenience. We share our favorite smart locks for 2025 and what we love about them.

Arduino has created a Renesas RA4M1 microcontroller board in its Nano form-factor. Called Nano R4, it follows the Uno R4, the first Arduino to use the RA4M1. “Whether you’re working on a connected ...

The best password is one you probably can't easily remember—that's why a password manager is so crucial to your online security. We review LastPass, Dashlane, Keeper, NordPass, and others to ...

What Is a SIC Code? Standard Industrial Classification (SIC) codes are four-digit numerical codes used to categorize U.S. companies by the industries in which they operate.

Forget keys! The best smart locks we've tested are secure, easy to install, and provide several convenient ways to control who can access your home and when.