I do not have an ATV yet, as I need to know if I can accomplish this setup before I make the purchase. Can I use an ATV3, and use a 3rd party cord which will allow me to have an RCA output from the ATV3? If I can do that above (I assume the answer is yes, but the quality will be reduced), how will the output look if I use an iPad 1 or 2 and use AirPlay to stream non-HD content to the projector? For example, I would use Keynote to show my students a presentation, but I would be able to be anywhere in the room while presenting. Thanks.