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eigenbau:analogoptocoupler:start [2024/07/31 11:26] – klauseigenbau:analogoptocoupler:start [2024/07/31 14:01] (current) – [Table] klaus
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 /************************************************************-<(kmk)>***/ /************************************************************-<(kmk)>***/
  
-====== Precision Optocoupler ======+====== Precision Optocoupler (v2.0) ======
 /* Ein Titelbild: */ /* Ein Titelbild: */
 /* {{:eigenbau:analogoptocoupler:BILDNAME.jpg?300|}} */ /* {{:eigenbau:analogoptocoupler:BILDNAME.jpg?300|}} */
  
 ==== Function ==== ==== Function ====
 +{{ :eigenbau:analogoptocoupler:pcb.jpg?400|}}
 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). 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).
  
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 == Properties == == Properties ==
 {{ :eigenbau:analogoptocoupler:step_response.jpg?100|}} {{ :eigenbau:analogoptocoupler:rms_ripple.jpg?100|}} {{ :eigenbau:analogoptocoupler:step_response.jpg?100|}} {{ :eigenbau:analogoptocoupler:rms_ripple.jpg?100|}}
 +  * Mechanical compatible with standard 160x100mm EuroCard slot (can be powered by backplane)
   * Bandwidth is roughly 200-250 kHz (step-response: 4 µs delay)   * Bandwidth is roughly 200-250 kHz (step-response: 4 µs delay)
   * RMS ripple on the output should be around  2-3 mV    * RMS ripple on the output should be around  2-3 mV 
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 Project date (v2.0): July 2024      /* Die Zeit zu der das Projekt begonnen wurde */ Project date (v2.0): July 2024      /* Die Zeit zu der das Projekt begonnen wurde */
  
 +About 10 almost fully populated boards have been ordered by VLBAI of which ~3-4 will be used.
 ==== Responsible ====  ==== Responsible ==== 
 [[zipfel@iqo.uni-hannover.de|Klaus Zipfel]] (VLBAI)   /* Auf wessen Mist das Ding gewachsen ist. Default: Der User, der die Dokuwikiseite anlegt.*/ [[zipfel@iqo.uni-hannover.de|Klaus Zipfel]] (VLBAI)   /* Auf wessen Mist das Ding gewachsen ist. Default: Der User, der die Dokuwikiseite anlegt.*/
  
 ==== Circuit diagram ==== ==== Circuit diagram ====
-The project is managed and hosted (at the moment) in the [[https://gitlab.projekt.uni-hannover.de/iqo-vlbai/electronics-hardware/analog-optocoupler|VLBAI gitlab instance]]. Access can be granted by VLBAI members. Alternatively, the project might be moved to the [[https://git.iqo.uni-hannover.de| IQ Git]]+The project is developed and managed by VLBAI at the [[https://gitlab.projekt.uni-hannover.de/iqo-vlbai/electronics-hardware/analog-optocoupler|VLBAI gitlab instance]]. Access can be granted by VLBAI members, if you need to develop on the project. A mirror is available [[https://git.iqo.uni-hannover.de/elektroniq/analog-optocoupler|IQ Gitea]]
   * The {{:eigenbau:src:analogoptocoupler:schematics_v2.0.pdf|schematic}} in PDF-Format   * The {{:eigenbau:src:analogoptocoupler:schematics_v2.0.pdf|schematic}} in PDF-Format
   * The {{:eigenbau:src:analogoptocoupler:production_v2.0.zip|production}} files (gerber, cpl, bom)   * The {{:eigenbau:src:analogoptocoupler:production_v2.0.zip|production}} files (gerber, cpl, bom)
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 Input and output signals should ideally match 100% (offset and amplitude). If not, adjust via the three trimmers until they match. Input and output signals should ideally match 100% (offset and amplitude). If not, adjust via the three trimmers until they match.
  
 +Then apply a step-function (e.g. 1V, 50% duty at 1 kHz) to the input and observe the output. If you see oscillations/harsh transients, you might have not populated capacitor C11, C14 (missed out by first JLCPCB batch -> Place 4.7 pF).
  
 ==== Kalkulation ==== ==== Kalkulation ====
-FIXME          /* Der Aufwand pro Gerät (Materialpreis, externe Fertigung, etc) */+/* Der Aufwand pro Gerät (Materialpreis, externe Fertigung, etc) */
  
-^           was ^ wieviel ^  E-Preis ^    Preis ^ Anmerkung  |  +^           was ^ wieviel  ^  E-Preis ^  Preis ^ Anmerkung                         ^ 
-|     Leiterplatte |   1x |  ??.?? € |  ??.?? € | 1/n von XXX EUR  | +|  Leiterplatte |      10x |       4€ |   40 € | JLCPCB                            | 
-|          Gehäuse |   1x |  ??.?? € |  ??.?? € |  | +|    Bestückung |      10x |    2.5 € |   25 € | JLCPCB                            | 
-|                * |   ?x |  ??.?? € |  ??.?? € | ...  | +|      Versandt |                       75 € ||| Express + Customs done by JLCPCB  | 
-|              R,C |  ??x |   0.02 € |   0.22 € | Bauform 0805  | +|                             Summe |||  150 € | 10 boards -> 15 € per board      | 
-|       Bestückung |                    ??.00 € ||| bei SRM  | + 
-|   [[..:verschnitt]] |                     ?.?? € |||  | +Additional components required per board (not populated by JLCPCB) 
-|                                         Summe |||  ??.?? € |  |+^ was               ^ wieviel  ^ E-Preis  ^ Preis    ^ Anmerkung                                                                                    ^ 
 +| Isolated BNC      | 2x       | 1.5 €    | 3 €      | Use from KMK                                                                                 | 
 +| REF03             | 2x       | 4.35 €   | 8.7 €    | Alternative: Can be REF02 of KMK                                                             | 
 +| BUF634            | 1x       | 3.42 €   | 3.42 €   | Use from KMK                                                                                 | 
 +| HCNR201           | 1x       | 7.28 €   | 7.28 €   | Use from KMK (HCNR200)                                                                       | 
 +| L7912 (TO-263-3)  | 2x       | 1 €      | 2 €      |                                                                                              | 
 +| L7812 (TO-263-3)  | 2x       | 1 €      | 2 €      |                                                                                              | 
 +| DCWN06A-15        | 1x       | 12.31 €  | 12.31 €  | Any isolated DC-DC converters that output +/-15 V can be used (industry standard footprint)  |
  
 <hidden v1.0 (2011 original version)> <hidden v1.0 (2011 original version)>
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 |   [[..:verschnitt]] |                     ?.?? € |||  | |   [[..:verschnitt]] |                     ?.?? € |||  |
 |                                         Summe |||  ??.?? € |  | |                                         Summe |||  ??.?? € |  |
- 
  
 </hidden> </hidden>