Transcription of Build A Video Switcher
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Build A Video Switcher
Build AVideo SwitcherReprinted with permission fromElectronics Now MagazineSeptember 1997 issue Copyright Gernsback Publications, Inc.,1997 Build AVIDEOSWITCHERW atch several cameras on one monitor with this simple deviceWith the cost of security cameras goingdown, adding a surveillance system for yourstore, office or home is becoming morepractical all the time. However, you mightbe dismayed at the thought of having to buya monitor for every camera that s a single monitor to a singlecamera also runs the risk of burning thecamera s image into the phosphor screen ofthe you prefer a single monitor instead of the NASA-Mission Control look, you could buya special monitor that has a Video switcherbuilt in. That type of monitor canautomatically switch between severalcamera inputs in sequence.
connect to the video inputs through J1-J4. The inputs are terminated with 75 ohm resistors R1-R4. The gain of the internal video amplifier is set by a feedback network
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