I wanted to have a way of remotely switching between the multiple video cameras that I have on my layout using the TMCC/Legacy remotes. I decided to try using an Accessory/Switch Controller as the switching device. I figured that the video bandwidth would pass through the ASC’s relays without much degradation.
I purchased an 8-connector “RCA” style connector array at Radio Shack for a couple of dollars to use as the inputs. I had to add one more RCA jack for the output. I mounted these connectors to the back of the ASC’s case with enough room to access the screw terminals on the ASC.
I used short jumper wires from the 8 input RCAs to the screw terminals. The 4 ASC output terminals are tied together and to the output connector with a formed piece of solid 22ga bus wire.
It works! It isn’t very convenient that you must turn OFF a camera in use before switching to the next camera, but that is tolerable.
Just when I was finishing up this project, I realized that some of the cameras include an audio output. If I decide to include audio, I can split this ASC into 4 video feeds (1-4) and 4 audio feeds (5-8) by simply adding another output connector and using two shorter looping bus wires. If I ever got really serious, I could add a second identically-modified ASC for the audio switching and program both ASCs to the same address range so that audio and video would switch together.