video turret


Posted on Feb 6, 2014

This is the complete design for a microprocessor-controlled, environmentally sealed 8` video turret with two cameras, remote or autofocus, zoom control, sun damage protection, 450-degree azimuth rotation, 9-speed scan and point capability, multidrop network connection, and extensive expandability. Included here are detailed photos, compl


video turret
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ete schematics, FORTH listings for the multitasking controller based on a low-cost embedded 68HC11 system, sources for hard-to-find parts, a detailed theory of operation, and comments on interfacing. The video turret began as so many projects do - yet another one of those irrepressible wild ideas that takes on a life of its own. Somewhere in the early days of this project, it occurred to me that it might be nice to have a video camera on board. I hadn`t had much luck using a hand-held camcorder in a sealed enclosure underway (too much hassle when things get interesting), so maybe we should mount one on deck somewhere. But which way should it point Hmmm. OK, so we`ll motorize it. Of course, it has to be sealed to handle the harsh environment. and hey, this would be great for the security system if it could see in low light. OK, so we`ll use two cameras, one color, one ultra low light B&W. Either should be able to point at any angle under software control, and scan between any pair of angles as well. at variable speed, of course. And, since the sun tends to damage things, it should be thermally protected, monitored for overheating, and provided with some sort of automatic shutter to protect the color CCD. Hey, while we`re at it, why not add a little laser, just for kicks Once begun, ideas like that tend to become design specifications, and that`s pretty much what happened. At the time, we were working in a lab at the...




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