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 ...

This is a simple 0 to 9 counter circuit constructed using Arduino! Here, a common cathode 7-segment LED display is connected to Arduino for displaying the digits. The code (Arduino sketch) allows push ...

To the human eye, it looks like multiple LED’s are lit up simultaneously. [Alex] planned to use an Arduino to control this display ... of perfboard with four push buttons.

Let it hit your red LED and you’ve lost a point. But if you can push your button while your yellow ... Inside the cool laser-cut box is an Arduino Uno and a 9V battery, plus a current-limiting ...