For this, just wire up the hardware (arduino+keypad) as described earlier. Although the code is an entry-level one, it includes a secret key option that will need to be entered on the keypad.

Not overly confident in his code, he also has it reset every 5 minutes of idling to safeguard against potential memory leaks — probably a good idea!

If you want to add a keypad to your Arduino project, the options are pretty limited. There’s that red and blue 4×4 membrane we’ve all seen in password-protected door lock projects, and the ...

Ford’s famous SecuriCode keypad is one of those little features you don’t think much about until you really need it. Instead ...

Here's the code for the Nurse's Station keypad in Silent Hill 2 Remake, and exactly how to solve the Nurse's Station keypad puzzle on Standard and Hard.

Arduino enthusiasts or those looking to learn more about programming with Arduino and electronics-in-general may be interested in a new Kickstarter campaign and Arduino compatible 42-Digit SPI ...

The keypad in the basement stands between you and the next step of the puzzle in Black Ops 6. This is how to solve it.

Arduino projects can help ease the learning curve of getting into programming, and even add some smart functionality to your everyday tasks around the house.

Silent Hill 2 Bug Room keypad code Here’s how to escape the room full of bugs that you will find yourself trapped in during the Silent Hill 2 remake.

Put Arduino to work protecting your secrets. This project is a keypad-controlled lock that will allow the user to select a six-digit secret code and lock out anyone without it.

Official Arduino Example Tutorials: The Arduino computer software is loaded with tons of examples for you to use in your own code or to run through as a learning experience.