update doc

sphinx/build/html/Ohmpi_V2_00/V2_00_step_02.html

@@ -947,7 +947,7 @@ on the ground terminal.</p></td>
 </td>
 </tr>
 <tr class="row-even"><td><p>Run Ohmpi_4elec.py, if everything works you should
-get the following result</p></td>
+get the following result (220 ohm)</p></td>
 </tr>
 </tbody>
 </table>

sphinx/build/html/Ohmpi_V2_00/V2_00_step_03.html

@@ -39,7 +39,7 @@
 <li class="toctree-l1"><a class="reference internal" href="../Ohmpi.html">OhmPi project</a></li>
 <li class="toctree-l1"><a class="reference internal" href="../V1_01.html">OhmPi V 1.01 (limited to 32 electrodes)</a></li>
 <li class="toctree-l1"><a class="reference internal" href="../V1_02.html">OhmPi V 1.02 (limited to 32 electrodes)</a></li>
-<li class="toctree-l1 current"><a class="reference internal" href="../V2_00.html">OhmPi V 2.xx (64 or 128 electrodes)</a><ul class="current">
+<li class="toctree-l1 current"><a class="reference internal" href="../V2_00.html">OhmPi V 2.xx (64 or 128 electrodes and 12V)</a><ul class="current">
 <li class="toctree-l2"><a class="reference internal" href="../V2_00.html#the-philosophy-of-ohmpi">The philosophy of Ohmpi</a></li>
 <li class="toctree-l2"><a class="reference internal" href="../V2_00.html#technical-data">Technical data</a></li>
 <li class="toctree-l2 current"><a class="reference internal" href="../V2_00.html#ohmpi-2-step-by-step">Ohmpi 2 step by step</a><ul class="current">
@@ -69,7 +69,7 @@
           <div role="navigation" aria-label="Page navigation">
   <ul class="wy-breadcrumbs">
       <li><a href="../index.html" class="icon icon-home"></a> &raquo;</li>
-          <li><a href="../V2_00.html">OhmPi V 2.xx (64 or 128 electrodes)</a> &raquo;</li>
+          <li><a href="../V2_00.html">OhmPi V 2.xx (64 or 128 electrodes and 12V)</a> &raquo;</li>
       <li><strong>STEP n°3</strong>: MUX board</li>
       <li class="wy-breadcrumbs-aside">
             <a href="../_sources/Ohmpi_V2_00/V2_00_step_03.rst.txt" rel="nofollow"> View page source</a>
@@ -255,6 +255,27 @@
 </tr>
 </tbody>
 </table>
+<p>The multiplexing of the channels is a mechanical multiplexing based on OMRON’s manufacturing relays (G5LE-1-VD 12 VDC). Each relay is combined with
+a ZVN4206A power MOFSET. The raspberry has only 30 GPIOs, which is not enough to activate all the 64 electrodes, which represent 512 GPIOs.
+We used gpio expender I2C (MCP23017). We have associated these components with an I2C muliplexer of type type TCA9548A from adafruit.
+This combination allows to go up to 512 GPIOs and up to 128 electrodes.
+Each card has its own digital address between 0X70 and 0X77.</p>
+<p>In the following presentation for an Ohmpi 64 electrodes, we will use the addresses 0X70 for channel A, 0X71 for channel B, 0X72 for channel M and 0X73 for channel N.
+0X73 for the N channel. 4 MUX board will be needed to multiplex an Ohmpi 64 electrodes.</p>
+<table class="docutils align-center">
+<colgroup>
+<col style="width: 12%" />
+<col style="width: 88%" />
+</colgroup>
+<tbody>
+<tr class="row-odd"><td rowspan="2"><p>1</p></td>
+<td><img alt="../_images/MUX_00.jpg" src="../_images/MUX_00.jpg" />
+</td>
+</tr>
+<tr class="row-even"><td><p>Take the Mux PCB</p></td>
+</tr>
+</tbody>
+</table>
 </div>
 </div>
 </div>

sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_02.rst.txt

@@ -461,5 +461,5 @@ Setting up an equivalent electronic circuit, for this you will need:
    |        |   .. image:: step_n_2/c/20211206_144334.jpg                |
    |7       +------------------------------------------------------------+
    |        | Run Ohmpi_4elec.py, if everything works you should         |                    
-   |        | get the following result                                   |
+   |        | get the following result (220 ohm)                         |
    +--------+------------------------------------------------------------+ 

sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_03.rst.txt

+
+**STEP n°3**: MUX board
+****************************************************
+
+
+**PART A** Assembly of MUX board
+======================================================
+
+
+Required components 
+----------------------------------------------------
+
+.. figure:: step_n_3/a/00_mes_board_components.jpg       
+	   :width: 600px
+	   :align: center
+	   :height: 450px
+	   :alt: alternate text
+	   :figclass: align-center 
+
+
+.. csv-table:: List of components
+   :file: step_n_3/a/MUX_board_list_2_xx.csv
+   :widths: 30, 70, 70, 70, 70, 35, 35
+   :header-rows: 1 
+   
+The multiplexing of the channels is a mechanical multiplexing based on OMRON's manufacturing relays (G5LE-1-VD 12 VDC). Each relay is combined with 
+a ZVN4206A power MOFSET. The raspberry has only 30 GPIOs, which is not enough to activate all the 64 electrodes, which represent 512 GPIOs. 
+We used gpio expender I2C (MCP23017). We have associated these components with an I2C muliplexer of type type TCA9548A from adafruit. 
+This combination allows to go up to 512 GPIOs and up to 128 electrodes.
+Each card has its own digital address between 0X70 and 0X77. 
+   
+In the following presentation for an Ohmpi 64 electrodes, we will use the addresses 0X70 for channel A, 0X71 for channel B, 0X72 for channel M and 0X73 for channel N. 
+0X73 for the N channel. 4 MUX board will be needed to multiplex an Ohmpi 64 electrodes.
+   
+.. table::
+   :align: center
+   
+   +--------+------------------------------------------------------------+
+   |        |   .. image:: step_n_3/a/MUX_00.jpg                         |
+   |      1 +------------------------------------------------------------+
+   |        | Take the Mux PCB                                           | 
+   |        |                                                            |                                                                       
+   +--------+------------------------------------------------------------+
\ No newline at end of file

sphinx/source/Ohmpi_V2_00/V2_00_step_02.rst

@@ -461,5 +461,5 @@ Setting up an equivalent electronic circuit, for this you will need:
    |        |   .. image:: step_n_2/c/20211206_144334.jpg                |
    |7       +------------------------------------------------------------+
    |        | Run Ohmpi_4elec.py, if everything works you should         |                    
-   |        | get the following result                                   |
+   |        | get the following result (220 ohm)                         |
    +--------+------------------------------------------------------------+ 

sphinx/source/Ohmpi_V2_00/V2_00_step_03.rst

@@ -21,4 +21,33 @@ Required components
 .. csv-table:: List of components
    :file: step_n_3/a/MUX_board_list_2_xx.csv
    :widths: 30, 70, 70, 70, 70, 35, 35
-   :header-rows: 1 
\ No newline at end of file
+   :header-rows: 1 
+   
+The multiplexing of the channels is a mechanical multiplexing based on OMRON's manufacturing relays (G5LE-1-VD 12 VDC). Each relay is combined with 
+a ZVN4206A power MOFSET. The raspberry has only 30 GPIOs, which is not enough to activate all the 64 electrodes, which represent 512 GPIOs. 
+We used gpio expender I2C (MCP23017). We have associated these components with an I2C muliplexer of type type TCA9548A from adafruit. 
+This combination allows to go up to 512 GPIOs and up to 128 electrodes. Each card has its own digital address between 0X70 and 0X77. 
+In the following presentation for an Ohmpi 64 electrodes, we will use the addresses 0X70 for channel A, 0X71 for channel B, 0X72 for channel M and 0X73 for channel N. 
+0X73 for the N channel. 4 MUX board will be needed to multiplex an Ohmpi 64 electrodes.
+   
+.. table::
+   :align: center
+   
+   +--------+------------------------------------------------------------+
+   |        |   .. image:: step_n_3/a/MUX_00.jpg                         |
+   |      1 +------------------------------------------------------------+
+   |        | Take the Mux PCB                                           | 
+   |        |                                                            |                                                                       
+   +--------+------------------------------------------------------------+
+
+.. table::
+   :align: center
+   
+   +--------+------------------------------------------------------------+
+   |        |   .. image:: step_n_3/a/MUX_01.jpg                         |
+   |      1 +------------------------------------------------------------+
+   |        | Take the Mux PCB                                           | 
+   |        |                                                            |                                                                       
+   +--------+------------------------------------------------------------+   
+   
+   
\ No newline at end of file