Author Topic: Video switch  (Read 2829 times)


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Video switch
« on: September 26, 2013, 04:04:59 PM »
Here is an old video switcher. Can either do a sequential switch between the 4 inputs, or do a composite of all 4 inputs on a single screen.

IMG_1289 by SeanB_ZA, on Flickr

The front panel with the whole 2 controls.

IMG_1290 by SeanB_ZA, on Flickr

Inside, with the SMPS on the left and the big board doing the heavy lifting.

IMG_1292 by SeanB_ZA, on Flickr

Heavy video work done by 2 Rockwell 6545 CRT controllers.

IMG_1293 by SeanB_ZA, on Flickr

A whole lot of DRAM, 24k in total.......

IMG_1294 by SeanB_ZA, on Flickr

The brains of the operation, Genuine Intel 8031.

Operation was to give about 1 update every 2 seconds, or to show a full screen of a single channel at about 1Hz. Picture would be monochrome, even with a colour input it gave no colour info out, just a greyscale and limited scale at that.


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Re: Video switch
« Reply #1 on: November 04, 2013, 07:33:35 PM »
Look at all those DIPS!  ;D
Eric Haney
Systems Programmer, EE, MCSE, DMC
SilverCore Labs


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Re: Video switch
« Reply #2 on: June 04, 2014, 12:11:57 AM »
I have a 16 channel one! :D
I think its used for CCTV cameras.
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