You can read the state of a button using Arduino and a few lines of code. The actual state is shown in the Serial Monitor window as 0 or 1, 0 meaning the button is not pressed and 1 that the button is ...

This Arduino is ... create a Red Play Button for the thousand subscriber count, Hodgins has made a full tutorial you can find on hackster.io. Files for the board and the code can also be found ...

[Lars] shows you how to get a perfect score on the first four levels of BIT.TRIP RUNNER by using an Arduino to time and send button presses ... the timing and hard-code it into the sketch.