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File:TTL Clock.jpg

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TTL_Clock.jpg (340 × 474 pixels, file size: 41 KB, MIME type: image/jpeg)

Summary

Description
English: A digital clock/calendar built of TTL parts, designed in the late 1970's as a real-time clock for a process control computer. Because of the high current draw, the standby power was a 12 V 8 AH lead-acid battery. The photo shows some loose TTL chips and a well-known manufacturer's catalog of TTL parts. I made this picture all by myself. Please Mr. Copyright Bot, don't delete it. --Wtshymanski (talk) 15:02, 3 January 2011 (UTC)
Date 10 April 2005 (original upload date)
Source Own work
Author Wtshymanski

Licensing

Public domain This work has been released into the public domain by its author, Wtshymanski. This applies worldwide.

In some countries this may not be legally possible; if so:
Wtshymanski grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

Original upload log

Transferred from en.wikipedia to Commons using For the Common Good.

The original description page was here. All following user names refer to en.wikipedia.
Date/Time Dimensions User Comment
14:58, 28 October 2013 340 × 474 (42,290 bytes) w:en:Milicevic01 (talk | contribs) Removed part of the image that shows copyrighted book
20:05, 10 April 2005 640 × 474 (106,638 bytes) w:en:Wtshymanski (talk | contribs) {{pd}} A digital clock/calendar built of TTL parts, designed in the late 1970's as a real-time clock for a process control computer. Because of the high current draw, the standby batter was a 12 V 8 AH lead-acid cell. The photo shows some loose TTL chips


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10 April 2005

File history

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Date/TimeThumbnailDimensionsUserComment
current14:59, 28 October 2013Thumbnail for version as of 14:59, 28 October 2013340 × 474 (41 KB)Milicevic01Transferred from en.wikipedia: see original upload log above

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