A keypad is one of the most commonly used input devices in microprocessor applications. In a standard keypad wired as an X-Y switch matrix, normally-open switches connect a row to a column when ...

Watch the video below to learn more about his Arduino-based portable keypad that connects to your ... and the software eliminates switch bounce like a boss! The complete alphabet (A-Z), numbers ...

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 ...

He’s constructed an Arduino keypad door lock — without using any ... The system auto-locks after 5 seconds, and just in case, [Andrea] has hard-coded in a few safety codes into the firmware ...