File:TTL Clock.jpg
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TTL_Clock.jpg (340 × 474 pixels, file size: 41 KB, MIME type: image/jpeg)
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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
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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: |
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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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:59, 28 October 2013 | | 340 × 474 (41 KB) | Milicevic01 | Transferred from en.wikipedia: see original upload log above |
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