Did you know that you can use Arduino to turn on an LED when you press a button? Well, it is true, you can do this! Leaving the joke aside, let me show how you can achieve this. You will need the ...

Carefully push ... blinking LED demo, come back here and get your keypad rolling. Once you’ve set up and tested your Arduino, it’s time to test out your prototype. Download the button_test ...

The loop code ... Upload button in the Blink Sketch IDE window. That's it. You've now compiled and run your first sketch. If everything worked, you will see the built-in LED on your Arduino ...