The ElephantStaircase wiki has posted a how to on building your own RCA switch box.
Most people only utilize the Video input on the front of their TV s for video game systems. Even if you utilize the inputs on the back you are still limited to probably 3 inputs total. This switch box allows you to plug in 4 RCA devices at once using only one input on your TV. A turn knob allows you to toggle between the 4 devices easily without unplugging devices.
This looks like a pretty cool project for all you DIYers out there sick of switching out their PS2, NES, Xbox, etc. Also looks like a good project for ambitious beginners in DIY electronics.
RCASwitchBox [ElephantStaircase]