ok. This is tougher than I thought.... :-)
take the output of your computer (DVI right) .... get an dvi to hdmi converter plug .... then use this plug to connect your computer to an hdmi input of your receiver via an hdmi cable. OK? You now have to connect your receiver to your projector. Take the hdmi output of your receiver and use either an hdmi -> dvi cable (if you have one) or use and hdmi cable and get an hdmi to dvi plug converter and then connect this into your projector. Result.... your PC is now connected to your projector thru your receiver. Any new devices that you buy, connect them up to your receiver and you are done. Your receiver IS a switch.
As for you confusion about the switch, I think you need to sit down and "breathe"... :-)
Look, an hdmi output allows you to plug in an hdmi cable. That cable can have an hdmi connector on both ends OR it can have an hdmi connector on ONE end and a DVI connector on the OTHER end.... in essence, it is a "converter" cable...... OR you can take an hdmi cable (with hdmi connectors on BOTH ends) and use an HDMI-> DVI converter PLUG to CONVERT the other end. It is basically the same thing.... you are going from HDMI -> DVI.... its basically that simple with a little "twist".... you have to worry about "SEX". As you know or should now that in the "normal world", "sex" works "best" between male and female. So as you make your connections, for instance, the FEMALE plug on your equipment must mate with a MALE plug on the cable and so on. That is the "birds and bees" of the electrical world. You have to follow this thru on your connection path from one end to the other.
End of lesson... :-)
oops not quite..... you CAN'T mix "species" readily. analog (COMPONENT) to digital (HDMI or DVI) works and is supported via electronic boxes / chipsets.... an example of that is likely your receiver which can take in analog video / audio signals and output digital signals on to an HDMI "creature". As I indicated, the reverse is basically against "industry nature", going HDMI to analog. Yes there are "unsanctioned"boxes that allow this in some form. I think the only "sanctioned" analog output is 480P.
OK.... thinking more on this. IF It is less likely that you will be playing / using content from your computer that is HDCP protected, then DVI -> component converters are readily available. Use one of these to move your computer signals from the DVI input on your projector to a component input. On the now empty DVI input, you can now plug in your receiver using a HDMI -> DVI converter plug.... OK? But note this only works when your computer plays / uses non-HDCP material.
Edited by budwich - 9/12/13 at 7:33am