This project is a keypad-controlled lock that will allow the ... their thoughts with the world at large. Instead of programming an Arduino to tweet, follow these directions to let it send texts ...

connect to the column C1-C3 pinouts of the keypad Next is a project example, where the Arduino is instructed to do something based on a correct key (secret number) being entered into the keypad, ...

For our latest workspace, we decided to skip the boring numbered keypad and build a custom ... but it’s digitally controlled by the Arduino. Meanwhile, each column of LEDs is activated by ...

He’s using an Arduino Uno and an Ethernet breakout board to hook it up to the network. This allows him to send text messages to himself when the alarm system is armed, disarmed, or triggered.