Video+Cassette+Recorder+(VCR)

Armon W Colzie
 * Video Cassette Recorder (VCR)**

-Purpose-
A device that can record and play back video to and from videotapes (video cassettes). Typical tapes can hold two to 6 hours of video, depending on quality.

-Energy-
//What energy transformations are seen in its operation?// > The energy that is used with a VCR is electricity. You have to plug it into a wall outlet, which allows the electricity to flow through the wires inside and out of the video cassette recorder, turning on all sensors, lasers, and lights on the inside. The electricity goes through the wires that are connected to the TV, and therefore creating a video signal

-Controls-
//What sensors/controls are designed into the device?// Moves the view to the oldest point of the browser-provided fetal trace- approximately 4 hours prior to the current time. Controls the scroll speed in the direction of the oldest data. When the button is pressed once with the , the trace begins moving slowly. However, if the button is pressed again with the the trace moves faster. The trace will continue to move faster upon each consecutive click of the button until the fourth click. On the fourth click the button reverts back to slow mode.
 * A video cassette recorder have just some buttons/keys that represent a specific function.When the key is pressed down, the corresponding function will either appear on the screen or will open new functions.

Pauses (stops) trace scrolling. Please note that if four hours of data is accumulated beyond the currently displayed point on the fetal trace, the trace will be shifted every minute thereafter to satisfy the 4.25 hr maximum display criterion.

Causes the trace to progress at a fixed rate toward the most recent point in time. Controls the scroll speed in the direction of the newest (most recent) data. When the button is pressed once with the , the trace begins moving slowly. However, if the button is pressed again with the , the trace moves faster. The trace will continue to move faster upon each consecutive click of the button until the fourth click. On the fourth click the button reverts back to slow mode.

Moves the view to the newest point of the browser-provided fetal trace – the most recent (current) time.

Rec for short records over videos that are blank you can record shows, movies, and other stuff of your TV.
 * These are the most common buttons in a video cassette recorder.

[[image:9_hour_Blank_video.jpg width="352" height="184"]] This is a 9 hour blank video that can be record stuff on your TV.
= -Material- = // What material(s) are essential to the device? // Science What is scientific principle is central to its operation?
 * magnetic tape
 * The drive mechanism in the VCR has to extract a good long piece of tape from the cassette and wrap it around a variety of rollers, drums and heads in order to play the tape.
 * t must deal with the tape -- an extremely thin, fairly fragile and incredibly long piece of plastic.
 * It must read the signals off of the tape and convert them to signals that a TV can understand.[[image:cg._magnetic.png]][[image:http://an.hitchcock.org/repairfaq/repair/whole/vcrxprt.gif width="613" height="459" caption="http://an.hitchcock.org/repairfaq/repair/whole/vcrxprt.gif"]][[image:file:///Users/131375/Library/Caches/TemporaryItems/moz-screenshot.png]][[image:file:///Users/131375/Library/Caches/TemporaryItems/moz-screenshot-1.png]][[image:file:///Users/131375/Desktop/vcrxprt.gif]] an.hitchcock.org/.../ repair/whole/vcrxprt.gif

-Science-
//What is scientific principle is central to its operation//
 * The main scientific principle of an VCR is electricity/magnetism.
 * The sound and light spectrum.
 * luminosity besides differing in color (frequency).
 * color mixing/additive color mixing.
 * The human aye.

-Design-
//What does a typical device look like?//
 * The very first Philips N1500 model included all the essential elements of a domestic video cassette recorder:Simple loading of cassette and simple operation by "Piano Key" controls, with full auto-stop at tape ends.
 * A tuner for recording off-air television programmes.
 * A clock with timer for unattended recordings.
 * A modulator to allow connection to a normal (for the time) television receiver without audio and video input connectors.

-Evolution-
//What changes have there been (or could there be) in this device?// In the past, the Video Cassette Recorder provided a much needed convenience. Life no longer revolved around being at home to watch prime-time television. Today’s systems have come a long way from the early analog tube cameras connected to a VCR. They now use network cameras and PC servers for video recording in a fully digitized system.

-Competitors-
//What other devices serve a similar purpose? A similar device that serves a similar purpose a VCR are.. a DVD player, a CD player .//

-Partners-
//What other devices work in conjunction with this device? a DVD, a CD player.//

-Siblings-
//What other devices use the same scientific principle? Is a DVD player.//