if your Arduino projects have outgrown LCD displays (or even large dot-matrix displays) then the next step could be to use a larger video display, such as a television or monitor with with composite input. This is made possible by a very simple circuit and Arduino library that gives our boards the power to create text and graphics for various forms of retro-looking displays. And as you may already know, it's simple to make various sound effects - which then give you the opportunity to create or reproduce a variety of games - such as Space Invaders:
All this and further instructions on how to connect a PS/2-interface keyboard to an Arduino have been documented by Instructables user "Mr E.". Doing so really is quite simple, so with some imagination you can have some fun or create something useful. To get started, head over to the Instructable. And for more, we're on twitter and Google+, so follow us for news and product updates as well.