For this, just wire up the hardware (arduino+keypad) as described earlier ... Note that the good old 3×4 telephone keypad from your junk box can also be used for this project. Like most keypads, it is ...

He used an Arduino, and multiplexed RGB LEDs with some digital potentiometers to create a color mixing keypad. Since we couldn’t fit the complete 4×4 keypad into a standard 2 gang wall box ...

The box contains ... runs on an Arduino Mega. This is hooked up to several sensors, including a temperature sensor, GPS unit, and CO sensor. There is also an LCD screen and numeric keypad for ...

The Arduino biometric lock box is equipped with an infrared sensor ... or add a small display to show status messages or even a keypad for an additional layer of security. The flexibility of ...

The box can be unlocked using a keypad, three tunable knobs, a ‘knocking’ pattern (through a piezo electric sensor), and a fingerprint sensor. The user must provide the proper inputs to each ...

You can also make one for yourself. Instructables user MakersBox did just that, with a tiny, modular Arduino-compatible board that can fit inside a Tic Tac box. The build uses a handful of parts ...

or a keypad. Your smartphone can display information, or playback sound. Why not let the smartphone be the shield? Enter 1Sheeld. 1Sheeld connects your Arduino to your smartphone (Android only ...