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diff --git a/sphinx/build/doctrees/environment.pickle b/sphinx/build/doctrees/environment.pickle
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diff --git a/sphinx/build/html/Ohmpi_V2_00/V2_00_step_02.html b/sphinx/build/html/Ohmpi_V2_00/V2_00_step_02.html
index 3b2db4300821cb523f44bb2408fbb3fa1756e399..7a3b606b12e3e7bab7b0e6bc57bc61cf0bea348d 100644
--- a/sphinx/build/html/Ohmpi_V2_00/V2_00_step_02.html
+++ b/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>
diff --git a/sphinx/build/html/Ohmpi_V2_00/V2_00_step_03.html b/sphinx/build/html/Ohmpi_V2_00/V2_00_step_03.html
index 55294eecec2c06101ef5a9ff2775d347795e79ef..a0f022019b3988c0a13f2fee4fae332d95acdcd0 100644
--- a/sphinx/build/html/Ohmpi_V2_00/V2_00_step_03.html
+++ b/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> »</li>
- <li><a href="../V2_00.html">OhmPi V 2.xx (64 or 128 electrodes)</a> »</li>
+ <li><a href="../V2_00.html">OhmPi V 2.xx (64 or 128 electrodes and 12V)</a> »</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>
diff --git a/sphinx/build/html/_images/00_mes_board_components1.jpg b/sphinx/build/html/_images/00_mes_board_components1.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..a04c9abdf2e35f6793c3ca0230c0a6f81a7ceb5d
Binary files /dev/null and b/sphinx/build/html/_images/00_mes_board_components1.jpg differ
diff --git a/sphinx/source/Ohmpi_V2_00/step_n_3/a/IMG_20211026_123517.jpg b/sphinx/build/html/_images/MUX_00.jpg
similarity index 100%
rename from sphinx/source/Ohmpi_V2_00/step_n_3/a/IMG_20211026_123517.jpg
rename to sphinx/build/html/_images/MUX_00.jpg
diff --git a/sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_02.rst.txt b/sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_02.rst.txt
index 63caad89aa3c0842f9f7846f3f92878576f08345..a133b257eb2da6ebb028e9ba7da90701d0d83490 100644
--- a/sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_02.rst.txt
+++ b/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) |
+--------+------------------------------------------------------------+
diff --git a/sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_03.rst.txt b/sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_03.rst.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4a31501e0502b8f31828f72d0f871f0f38ef4f31
--- /dev/null
+++ b/sphinx/build/html/_sources/Ohmpi_V2_00/V2_00_step_03.rst.txt
@@ -0,0 +1,43 @@
+
+**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
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project","<strong>STEP n\u00b01</strong> : Raspberry Pi configuration","<strong>STEP n\u00b02</strong>: Measurement board","<strong>STEP n\u00b03</strong>: MUX board","OhmPi V 1.01 (limited to 32 electrodes)","OhmPi V 1.02 (limited to 32 electrodes)","OhmPi V 2.xx (64 or 128 electrodes and 12V)","OHMPI: Open source and open hardware resitivity-meter"],titleterms:{"128":6,"12v":6,IDE:[1,4,5],The:[4,5,6],activ:[1,4,5],assembl:[2,3,4,5],board:[2,3,4,5],card:[4,5],center:7,check:2,cite:0,complet:[4,5],compon:[2,3,4,5],configur:[1,4,5],connect:[4,5],current:[4,5],data:[4,5,6],descript:[2,4,5],document:7,electr:[4,5],electrod:[4,5,6],environn:[1,4,5],four:[4,5],frist:[4,5],hardwar:7,implement:[4,5],implent:[4,5],initi:[4,5],inject:[4,5],instal:[1,4,5],instruct:[4,5],introduct:0,limit:[4,5],list:[2,3,4,5],measur:[2,4,5],mesur:[4,5],meter:7,multiplex:[4,5],mux:3,ohmpi:[0,4,5,6,7],onli:[4,5],open:7,oper:[4,5],packag:[1,4,5],paramet:[4,5],part:[1,2,3],partenair:0,philosophi:[4,5,6],preliminari:[4,5],procedur:[4,5],project:0,python:[1,4,5],rapberri:[1,4,5],raspberri:[1,4,5],requir:[2,3],resist:[4,5],resit:7,sourc:7,start:2,startup:[4,5],step:[1,2,3,6],summari:7,tabl:4,technic:[4,5,6],thonni:[1,4,5],titl:4,virtual:[1,4,5]}})
\ No newline at end of file
diff --git a/sphinx/source/Ohmpi_V2_00/V2_00_step_02.rst b/sphinx/source/Ohmpi_V2_00/V2_00_step_02.rst
index 63caad89aa3c0842f9f7846f3f92878576f08345..a133b257eb2da6ebb028e9ba7da90701d0d83490 100644
--- a/sphinx/source/Ohmpi_V2_00/V2_00_step_02.rst
+++ b/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) |
+--------+------------------------------------------------------------+
diff --git a/sphinx/source/Ohmpi_V2_00/V2_00_step_03.rst b/sphinx/source/Ohmpi_V2_00/V2_00_step_03.rst
index 4684d5a143c3a16e2c534a45eb33b8f40da80fd3..4ff499043765b9f6ab0ed2bdde08b7a7d36f0c2d 100644
--- a/sphinx/source/Ohmpi_V2_00/V2_00_step_03.rst
+++ b/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
diff --git a/sphinx/source/Ohmpi_V2_00/step_n_3/a/MUX_00.jpg b/sphinx/source/Ohmpi_V2_00/step_n_3/a/MUX_00.jpg
new file mode 100644
index 0000000000000000000000000000000000000000..686a35fc45a6a18ace8edd339a876e14a9bef592
Binary files /dev/null and b/sphinx/source/Ohmpi_V2_00/step_n_3/a/MUX_00.jpg differ
diff --git a/sphinx/source/Ohmpi_V2_00/step_n_3/a/IMG_20211026_131345.jpg b/sphinx/source/Ohmpi_V2_00/step_n_3/a/MUX_01.jpg
similarity index 100%
rename from sphinx/source/Ohmpi_V2_00/step_n_3/a/IMG_20211026_131345.jpg
rename to sphinx/source/Ohmpi_V2_00/step_n_3/a/MUX_01.jpg
diff --git a/sphinx/source/Ohmpi_V2_00/step_n_3/a/IMG_20211026_135840.jpg b/sphinx/source/Ohmpi_V2_00/step_n_3/a/MUX_02.jpg
similarity index 100%
rename from sphinx/source/Ohmpi_V2_00/step_n_3/a/IMG_20211026_135840.jpg
rename to sphinx/source/Ohmpi_V2_00/step_n_3/a/MUX_02.jpg