File:TV Typewriter Kit 1.jpg
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TV_Typewriter_Kit_1.jpg (640 × 480 pixels, file size: 166 KB, MIME type: image/jpeg)
This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
DescriptionTV Typewriter Kit 1.jpg |
The TV Typewriter was video terminal that could display 16 lines of 32 upper case characters on a standard television. Designed by Don Lancaster, it was published in the September 1973 issue of Radio-Electronics magazine. Thousands were built, this one by Bob Rethemeyer. The bare circuit boards could be ordered but Bob fabricated his own boards. The lower board is the mainframe with the power supply and RF modulator. Above that is the cursor board. The cursor keeps track of where the next character goes. The middle board has 512 six-bit words of screen memory. The top board generates all of the timing signals. These boards could be stacked in any order. The control switches are in the background. |
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Date | ||||||
Source | The photo was made by Bob Rethemeyer in November 2004 for an article on www.swtpc.com. The article and photos may be reused for any purpose without restrictions. The TVT photographs are in the public domain. [1] | |||||
Author | Bob Rethemeyer | |||||
Permission (Reusing this file) |
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Other versions | File:TV Typewriter Kit 2.jpg |
Licensing
Public domainPublic domainfalsefalse |
This work has been released into the public domain by its author, Bob Rethemeyer. This applies worldwide. In some countries this may not be legally possible; if so: Bob Rethemeyer grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. Public domainPublic domainfalsefalse |
Items portrayed in this file
depicts
November 2004
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 22:16, 30 December 2011 | 640 × 480 (166 KB) | Swtpc6800 | == {{int:filedesc}} == {{Information |Description= The TV Typewriter was video terminal that could display 16 lines of 32 upper case characters on a standard television. Designed by Don Lancaster, it was published in the September |
File usage
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Metadata
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
Image title |
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Camera manufacturer | FUJIFILM |
Camera model | FinePix2600Zoom |
Author | Photo by Bob Rethemeyer |
Copyright holder |
|
F-number | f/3.5 |
ISO speed rating | 100 |
Date and time of data generation | 13:51, 21 November 2004 |
Lens focal length | 6 mm |
Short title |
|
Width | 640 px |
Height | 480 px |
Bits per component |
|
Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 120 dpi |
Vertical resolution | 120 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop Elements 5.0 Windows |
File change date and time | 14:19, 3 February 2008 |
Exposure Program | Normal program |
Exif version | 2.1 |
Date and time of digitizing | 13:51, 21 November 2004 |
Meaning of each component |
|
Image compression mode | 1.6 |
Shutter speed | 3 |
APEX aperture | 3.6 |
APEX brightness | 1.7 |
Exposure bias | 0 |
Maximum land aperture | 3.6 APEX (f/3.48) |
Metering mode | Pattern |
Flash | Flash did not fire |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 3,053 |
Focal plane Y resolution | 3,053 |
Focal plane resolution unit | 3 |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Y and C positioning | Co-sited |
Supported Flashpix version | 1 |
Image width | 640 px |
Image height | 480 px |
Date metadata was last modified | 06:19, 3 February 2008 |
Writer | Michael Holley www.swtpc.com/mholley |
Copyright status | Copyright status not set |
IIM version | 2 |
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