rickb@bucket.UUCP (Rick Bensene) (11/13/89)
Hello, Net, I have a need for something that switches video. What I'm looking for is a device that will accept N (where N is a number from 2 on up) RF video sources, and allow me to select one of them to be routed to the output. This device should be remotely controllable, by either infrared remote control, RS-232C serial, or by TTL compatible inputs. Low cost is a must. I could get by with only two inputs, so if there is something such as an RF relay that I could use, that would be acceptable. This is for a home automation project that I'm working on. I have a small computer which puts out video on Channel 3. This computer is connected to the larger master controller computer via RS232 serial. The video capabilities of the small computer are used to create displays which I want to be able to put on on the screen on all TVs in the house (they are all connected together with a video distribution system (aka Rabbit). Normally, the cable tuner box outputs video to channel 3, so all of the TVs in the house are tuned to channel 3. I want to be able to switch out the cable box, and switch in the Channel 3 video from the small computer to display reminders, system status information, etc., as the control system sees fit. The key is that the switch has to be able to be thrown remotely by the control system...a manual switch won't do it. I'm not a high-frequency design person, so I don't know much about the details of how to make such a device, but if it isn't critical, I'd build one if someone can give me some guidelines. If there's something cheap that I can buy that will fit the bill, I'd consider that, too, but I don't have much of a budget for this. Any suggestions or hints gratefully appreciated. Rick Bensene -- Rick Bensene Tektronix, Inc. PO Box 3500 C1-890 Vancouver, WA 98668 rickb@tekigm2.MEN.TEK.COM (work) Voice: (206) 253-5685 (10A-5P Pacific) ..tektronix!tessi!bucket!rickb (home) BBS: (503) 254-0458 300/1200/2400
barry@hprmokg.HP.COM (Barry Fowler) (11/16/89)
Try looking at the Signetics TDA8440 Video and Audio Switch IC. Page 11-46 of the Feb. 1987 Video Linear IC manual. ' Two video inputs, 4 audio inputs, switched to 2 audio out. and 1 video out.
mmm@cup.portal.com (Mark Robert Thorson) (11/16/89)
Matrix Systems Corporation makes exactly what you describe. 5177 North Douglas Fir Road Calabasas, CA 91302 (818) 992-6776