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electronic:equipment:h500 [2021/06/15 09:01] – tonyelectronic:equipment:h500 [2026/10/12 21:02] (current) – tony
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 There is a 110V version (H-500) and a 240V version (H-500-A), but all the logic runs on 5V.  It came with a Computer Lab workbook (item B-350) and an assortment of 107 patch cords of assorted lengths from 2.75" to 24.75" (item "916").  There was also a Computer Lab Teaching Wall Poster (24" x 36"). There is a 110V version (H-500) and a 240V version (H-500-A), but all the logic runs on 5V.  It came with a Computer Lab workbook (item B-350) and an assortment of 107 patch cords of assorted lengths from 2.75" to 24.75" (item "916").  There was also a Computer Lab Teaching Wall Poster (24" x 36").
 +
 +{{ :electronic:equipment:h500:dec-clw-3.gif?300|H-500 Computer Lab Poster}}
  
 ===== Hardware description ===== ===== Hardware description =====
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 There are 8 rocker switches for providing logic 0 or 1 inputs, and 3 momentary rocker switches to provide pulsed inputs.  Additionally there is also a variable resistor control for an oscillator that has 6 selectable clock ranges, 3 "fine" and 3 "coarse" There are 8 rocker switches for providing logic 0 or 1 inputs, and 3 momentary rocker switches to provide pulsed inputs.  Additionally there is also a variable resistor control for an oscillator that has 6 selectable clock ranges, 3 "fine" and 3 "coarse"
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-The patch cords are colour coded according t length:+The patch cords are colour coded according to length:
 {{ :electronic:equipment:h500:p6148949a.jpg}} {{ :electronic:equipment:h500:p6148949a.jpg}}
  
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 {{:electronic:equipment:h500:p6148952a.jpg?200}}{{:electronic:equipment:h500:p6148953a.jpg?100}}{{:electronic:equipment:h500:p6148956a.jpg?100}} {{:electronic:equipment:h500:p6148952a.jpg?200}}{{:electronic:equipment:h500:p6148953a.jpg?100}}{{:electronic:equipment:h500:p6148956a.jpg?100}}
  
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 I've got two versions, one with light bulbs as output, the other with red LEDs.  I'm not entirely sure whether the LEDs were a standard version, or whether someone has retrofitted them (possibly to replace failing light bulbs). I've got two versions, one with light bulbs as output, the other with red LEDs.  I'm not entirely sure whether the LEDs were a standard version, or whether someone has retrofitted them (possibly to replace failing light bulbs).
  
-====== References and Additional Resources ====== 
-  * {{electronic:equipment:h500:computer_lab_workbook.pdf|H-500 Computer Lab Workbook}} 
-  * {{electronic:equipment:h500:digital_computer_lab_workbook_1969.pdf|H-500 Computer Lab Workbook}} copy 2 
-  * {{electronic:equipment:h500:computerlabteachersguide.pdf|H500 Computer Lab Teachers Guide}} 
- 
-  * [[https://archive.org/details/bitsavers_dechandboobWorkbook1969_6837997|Some Thoughts from the Author of workbook]] 
-  * [[https://www.instructables.com/DEC-H-500-Computer-Lab-Reproduction/|DEC H-500 Computer Lab Reproduction]] 
-    * [[https://hackaday.io/project/170232-dec-h-500-computer-lab-reproduction/log/185600-the-designer-of-the-original-h-500-computer-lab-reaches-out|Notes from John Hughes about Computer Lab]] 
-  * [[https://so-much-stuff.com/pdp8/computerlab/computerlab.php|Vince Slyngstad's DEC "Computer Lab" page]] 
-  * [[http://www.decodesystems.com/dec-clw.html|DEC Computer Lab]] 
- 
-<html><small><p>If any referenced page no longer exists, try looking for its URL on <a href="http://archive.org">http://archive.org</a>.</p></small></html> 
 \\ \\
 ---- ----
 +===== Schematics =====
 +^DEC H-500 schematic :^
 +{{electronic:equipment:h500:h500_computer_lab.png|DEC H-500 schematic}} ((From Glenn Axelrod))
 +/* is this https://www.axelrodbroadcastsolutions.com Glen? */
 +/* Old image was electronic:equipment:h500:h500_schematic.png */
 +\\
 +----
 +
 +===== Examples =====
 +^Example 1^
 {{:electronic:equipment:h500:p6148894a.jpg?200|DEC H-500 label}} {{:electronic:equipment:h500:dsc_2578a.jpg?200|DEC H-500 label}} {{:electronic:equipment:h500:p6148894a.jpg?200|DEC H-500 label}} {{:electronic:equipment:h500:dsc_2578a.jpg?200|DEC H-500 label}}
  
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 ---- ----
 +^Example 2^
 {{:electronic:equipment:h500:p6148896a.jpg?200|DEC H-500 label}} {{:electronic:equipment:h500:p6148896a.jpg?200|DEC H-500 label}}
  
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 {{:electronic:equipment:h500:p6148928a.jpg?400|DEC H-500 light}} {{:electronic:equipment:h500:p6148928a.jpg?400|DEC H-500 light}}
  
-{{electronic:equipment:h500:h500_schematic.png|DEC H-500 schematic}}+\\ 
 +\\
  
 +====== References and Additional Resources ======
 +  * {{electronic:equipment:h500:computer_lab_workbook.pdf|H-500 Computer Lab Workbook}}
 +  * {{electronic:equipment:h500:digital_computer_lab_workbook_1969.pdf|H-500 Computer Lab Workbook}} copy 2
 +  * {{electronic:equipment:h500:computerlabteachersguide.pdf|H500 Computer Lab Teachers Guide}}
 +
 +  * [[https://archive.org/details/bitsavers_dechandboobWorkbook1969_6837997|Some Thoughts from the Author of workbook, John Hughes]]
 +  * [[https://www.instructables.com/DEC-H-500-Computer-Lab-Reproduction/|DEC H-500 Computer Lab Reproduction]]
 +    * [[https://hackaday.io/project/170232-dec-h-500-computer-lab-reproduction/log/185600-the-designer-of-the-original-h-500-computer-lab-reaches-out|Notes from John Hughes about Computer Lab]]
 +    * [[https://hackaday.io/project/170232-dec-h-500-computer-lab-reproduction/log/185604-more-from-john-hughes|More notes from John Hughes]]
 +  * [[https://so-much-stuff.com/pdp8/computerlab/computerlab.php|Vince Slyngstad's DEC "Computer Lab" page]]
 +  * [[http://www.decodesystems.com/dec-clw.html|DEC Computer Lab]]
 +
 +<html><small><p>If any referenced page no longer exists, try looking for its URL on <a href="http://archive.org">http://archive.org</a>.</p></small></html>
 +\\
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electronic/equipment/h500.1623747689.txt.gz · Last modified: 2021/06/15 09:01 by tony
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