meta data for this page
  •  

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
Next revisionBoth sides next revision
eigenbau:analogoptocoupler [2011/08/12 12:26] – [Circuit diagram] kelkareigenbau:analogoptocoupler [2012/10/12 16:25] – external edit 127.0.0.1
Line 8: Line 8:
  
 ====  Function ==== ====  Function ====
-An optocoupler is used to isolate a voltage source from the process (or experiment) by creating a optical link between the two using an LED-photodiode combination. A digital optocoupler can output only digital signals (high or low), while an analog optocoupler faithfully reproduces the input voltage into the same output voltage but now produced by an independent power source. This device provides the best isolation of the power source (typically an analog output card of a computer) from failures that occur on the experiment side (eg: voltage spikes during fast switching of magnetic fields).+An optocoupler is used to isolate a voltage source from the process (or experiment) by creating a optical link between the two using an LED-photodiode combination. A digital optocoupler can output only digital signals (high or low), while an analog optocoupler faithfully reproduces the input voltage into the same output voltage but now produced by an independent power source. This device provides good electrical isolation of the power source (typically, an analog output card of a computer) from potentially harmful processes that might occur on the experiment side (eg: voltage spikes during fast switching of magnetic fields).
  
-The optocoupler circuit and the board is a replica of the circuit by Todd Meyrath which can be found {{http://george.ph.utexas.edu/~meyrath/informal/|here}}. The original board was designed using the layout software "pcb123". Since the version is now obsolete, it has been remade by me using "Eagle" version 5.11.0. The schematic is identical with no exceptions. The board layout is similar except for minor adjustments. The complete documentation for the original circuit can be found on the above website and I am not including all the options here. The options mentioned in the documentation can be implemented by identifying the respective components in the schematic.+The optocoupler circuit and the board is a replica of the circuit by Todd Meyrath which can be found {{http://george.ph.utexas.edu/~meyrath/informal/|here}}. The original board was designed using the layout software "pcb123". Since the version is now obsolete, it has been remade by me using "Eagle" version 5.11.0. The schematic is identical to the original one and only the part labels are different. The board layout is similar except for minor adjustments. The complete documentation for the original circuit can be found on the above website and I am not including all the options here. All options mentioned in the documentation can be implemented by identifying the labels of respective components in the schematic.
  
 /* Ausführlichere Beschreibung: {{:eigenbau:analogoptocoupler:analogoptocoupler.lyx|}} */ /* Ausführlichere Beschreibung: {{:eigenbau:analogoptocoupler:analogoptocoupler.lyx|}} */
Line 38: Line 38:
 ==== Circuit diagram==== ==== Circuit diagram====
   * The {{:eigenbau:src:analogoptocoupler:analogoptocoupler.pdf|schematic}} in PDF-Format   * The {{:eigenbau:src:analogoptocoupler:analogoptocoupler.pdf|schematic}} in PDF-Format
-  * The source files can be obtained from the [[eigenbau:src:sourcen#Precision Analog Optocoupler|Download-page]] of wiki.+  * The Eagle source files can be obtained from the [[eigenbau:src:sourcen#Precision Analog Optocoupler|Download-page]] of wiki. (Direkt-Link: {{:eigenbau:src:analogoptocoupler:analogoptocoupler.sch|Schematic}}, {{:eigenbau:src:analogoptocoupler:analogoptocoupler.brd|Board}})
  
-{{:eigenbau:src:analogoptocoupler:analogoptocoupler.png? 600|}} 
 ==== Layout ==== ==== Layout ====
   * Abmessungen der Leiterplatte: FIXME /* Höhe mal Breite in mm */   * Abmessungen der Leiterplatte: FIXME /* Höhe mal Breite in mm */