red_car:
Thanks for the reply.Do you think I could get away with doing this to just some of the wires within the cable? I presume that some of them are more critical than others for sending the video signal? Any ideas on the minimum number I would need to block to effectively turn off the signal?
Thanks.
I don't know for sure, it would depend the purpose of each wire and I'm not familiar with any of the details for the HDMI standards and specifications. My advice is plan to use a MOSFET for each contact. Keep in mind though, there are ways to tie them all together so they could all be switched at the same time and probably with just one digital pin.
Also have you looked for HDMI connectors? You'll need two and buying them, even at low volume prices, is going to be significantly less expensive than sacrificing a store bought cable. If you can find ready-made break-out boards (especially populated ones) that will make things easier still.