PIC, AVR, and Arduino are ubiquitous in projects these ... but lacking a chip for that he went with the 555 because it has one built-in. Three resistors and a capacitor later he’s in business ...

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 ...

The case even lets the Arduino’s power LED shine through so you know that it’s working! If you, too, need to automate video game button-pushing, [Facelesstech] has kindly uploaded the source ...