diff --git a/public/_sources/page1.rst.txt b/public/_sources/page1.rst.txt
index 117865b247da9b3ddab0648bce6f0f98e8343b97..eaf4827699b66a6a6b1bc7b2c47eca2517685698 100644
--- a/public/_sources/page1.rst.txt
+++ b/public/_sources/page1.rst.txt
@@ -164,11 +164,14 @@ If you decided to use a virtual environment, it is necessary to setup Thonny Pyt
 9- Close thonny to save modifications
 
  
-Measurement and Injection board developpement
-************************************************************************** 
+Assembly of the measuring/current injection cards, and connection with the Raspberry Pi
+***************************************************************************************** 
 
-Electrical resistivity measurements
-===================================
+Electrical resistivity measurements board
+==========================================
+
+a) Description
+-----------------------------
 
 To measure electrical resistivity with Raspberry Pi, an ADS1115 was introduced, as proposed by Florsch [7]. The ADS1115
 is a 16-bit ADC (Analog-to-Digital Converter), with an adaptable gain. Its value has been set at 2/3 in this study. The 
@@ -210,19 +213,21 @@ constitutes a potential hazard. We therefore recommend adding a 1.5-A fuse betwe
    :figclass: align-center
    
    Measurement board
-
-Implementation
-==============
-
+   
+b) Implementation
+--------------------------------
 The measurement board must be printed using the PCB file (Source file repository), with components soldered onto 
 it by following the steps described below and illustrated in the following figure :
 
-
 * Step no. 1: installation of the 1-Kohm resistors with an accuracy of ± 1%. 
 * Step no. 2: installation of the 1.5-Kohm resistors with an accuracy of ± 1%. 
-* Step no. 3: installation of both the black female 1 x 10 header and the 7-blue screw terminal blocks 
-* Step no. 4: installation of the 50-Ohm reference resistor ± 0.1% 
-* Step no. 5: addition of both the ADS115 directly onto the header (pins must be plugged according to the figure) and the LM358N operational amplifiers (pay attention to the direction).
+* Step no. 3: test divider bridge
+
+				UNDERconstruction
+
+* Step no. 4: installation of both the black female 1 x 10 header and the 7-blue screw terminal blocks 
+* Step no. 5: installation of the 50-Ohm reference resistor ± 0.1% 
+* Step no. 6: addition of both the ADS115 directly onto the header (pins must be plugged according to the figure) and the LM358N operational amplifiers (pay attention to the direction).
 
 1-Kohm and 1.5-Kohm resistors apply to the divider bridge. If, for example, you prefer using a weaker 
 or stronger power supply, it would be possible to adjust the divider bridge value by simply modifying these resistors. 
@@ -248,8 +253,8 @@ place a fuse holder with a 1.5-A fuse for safety purposes.
    
    Measurement board installation with Raspberry Pi
    
-Current injection 
-=================
+Current injection board
+=======================
 
 To carry out the electrical resistivity measurement, the first step consists of injecting current into the ground.
 In our case, a simple 12-V lead-acid battery is used to create an electrical potential difference that results 
diff --git a/public/index.html b/public/index.html
index a5ba7e04b2a976fe117e1482ccc4da1b49af2821..22914225d450fda3067492a93441c1910642c7c3 100644
--- a/public/index.html
+++ b/public/index.html
@@ -191,7 +191,7 @@
 <li class="toctree-l2"><a class="reference internal" href="page1.html#the-philosophy-of-ohmpi">The philosophy of Ohmpi</a></li>
 <li class="toctree-l2"><a class="reference internal" href="page1.html#technical-data">Technical data</a></li>
 <li class="toctree-l2"><a class="reference internal" href="page1.html#raspberry-pi-configuration">Raspberry Pi  configuration</a></li>
-<li class="toctree-l2"><a class="reference internal" href="page1.html#measurement-and-injection-board-developpement">Measurement and Injection board developpement</a></li>
+<li class="toctree-l2"><a class="reference internal" href="page1.html#assembly-of-the-measuring-current-injection-cards-and-connection-with-the-raspberry-pi">Assembly of the measuring/current injection cards, and connection with the Raspberry Pi</a></li>
 <li class="toctree-l2"><a class="reference internal" href="page1.html#multiplexer-implentation">Multiplexer implentation</a></li>
 <li class="toctree-l2"><a class="reference internal" href="page1.html#electrode-connection">Electrode connection</a></li>
 <li class="toctree-l2"><a class="reference internal" href="page1.html#operating-instruction">Operating instruction</a></li>
diff --git a/public/page1.html b/public/page1.html
index 5f6564a3c4d442decedd59e57d4662f45c37c0c9..752cd38d37546a427387cd217f1e645c87eeb75a 100644
--- a/public/page1.html
+++ b/public/page1.html
@@ -92,10 +92,13 @@
 <li class="toctree-l3"><a class="reference internal" href="#activate-virtual-environnement-on-thonny-python-ide-on-rapberry-pi">Activate virtual environnement on Thonny (Python IDE)  (on Rapberry Pi)</a></li>
 </ul>
 </li>
-<li class="toctree-l2"><a class="reference internal" href="#measurement-and-injection-board-developpement">Measurement and Injection board developpement</a><ul>
-<li class="toctree-l3"><a class="reference internal" href="#electrical-resistivity-measurements">Electrical resistivity measurements</a></li>
-<li class="toctree-l3"><a class="reference internal" href="#implementation">Implementation</a></li>
-<li class="toctree-l3"><a class="reference internal" href="#current-injection">Current injection</a></li>
+<li class="toctree-l2"><a class="reference internal" href="#assembly-of-the-measuring-current-injection-cards-and-connection-with-the-raspberry-pi">Assembly of the measuring/current injection cards, and connection with the Raspberry Pi</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#electrical-resistivity-measurements-board">Electrical resistivity measurements board</a><ul>
+<li class="toctree-l4"><a class="reference internal" href="#a-description">a) Description</a></li>
+<li class="toctree-l4"><a class="reference internal" href="#b-implementation">b) Implementation</a></li>
+</ul>
+</li>
+<li class="toctree-l3"><a class="reference internal" href="#current-injection-board">Current injection board</a></li>
 <li class="toctree-l3"><a class="reference internal" href="#frist-four-electrodes-resistivity-mesurement">Frist four electrodes resistivity mesurement</a></li>
 </ul>
 </li>
@@ -319,10 +322,12 @@ to leave the virtual environment simply type:</p>
 <p>9- Close thonny to save modifications</p>
 </div>
 </div>
-<div class="section" id="measurement-and-injection-board-developpement">
-<h2>Measurement and Injection board developpement<a class="headerlink" href="#measurement-and-injection-board-developpement" title="Permalink to this headline">¶</a></h2>
-<div class="section" id="electrical-resistivity-measurements">
-<h3>Electrical resistivity measurements<a class="headerlink" href="#electrical-resistivity-measurements" title="Permalink to this headline">¶</a></h3>
+<div class="section" id="assembly-of-the-measuring-current-injection-cards-and-connection-with-the-raspberry-pi">
+<h2>Assembly of the measuring/current injection cards, and connection with the Raspberry Pi<a class="headerlink" href="#assembly-of-the-measuring-current-injection-cards-and-connection-with-the-raspberry-pi" title="Permalink to this headline">¶</a></h2>
+<div class="section" id="electrical-resistivity-measurements-board">
+<h3>Electrical resistivity measurements board<a class="headerlink" href="#electrical-resistivity-measurements-board" title="Permalink to this headline">¶</a></h3>
+<div class="section" id="a-description">
+<h4>a) Description<a class="headerlink" href="#a-description" title="Permalink to this headline">¶</a></h4>
 <p>To measure electrical resistivity with Raspberry Pi, an ADS1115 was introduced, as proposed by Florsch [7]. The ADS1115
 is a 16-bit ADC (Analog-to-Digital Converter), with an adaptable gain. Its value has been set at 2/3 in this study. The
 input signal value could lie between - to + 6.114 V. The ADS1115 is mounted on a board adapted from an in-house design.
@@ -359,16 +364,21 @@ constitutes a potential hazard. We therefore recommend adding a 1.5-A fuse betwe
 <p class="caption"><span class="caption-text">Measurement board</span><a class="headerlink" href="#id1" title="Permalink to this image">¶</a></p>
 </div>
 </div>
-<div class="section" id="implementation">
-<h3>Implementation<a class="headerlink" href="#implementation" title="Permalink to this headline">¶</a></h3>
+<div class="section" id="b-implementation">
+<h4>b) Implementation<a class="headerlink" href="#b-implementation" title="Permalink to this headline">¶</a></h4>
 <p>The measurement board must be printed using the PCB file (Source file repository), with components soldered onto
 it by following the steps described below and illustrated in the following figure :</p>
-<ul class="simple">
+<ul>
 <li><p>Step no. 1: installation of the 1-Kohm resistors with an accuracy of ± 1%.</p></li>
 <li><p>Step no. 2: installation of the 1.5-Kohm resistors with an accuracy of ± 1%.</p></li>
-<li><p>Step no. 3: installation of both the black female 1 x 10 header and the 7-blue screw terminal blocks</p></li>
-<li><p>Step no. 4: installation of the 50-Ohm reference resistor ± 0.1%</p></li>
-<li><p>Step no. 5: addition of both the ADS115 directly onto the header (pins must be plugged according to the figure) and the LM358N operational amplifiers (pay attention to the direction).</p></li>
+<li><p>Step no. 3: test divider bridge</p>
+<blockquote>
+<div><p>UNDERconstruction</p>
+</div></blockquote>
+</li>
+<li><p>Step no. 4: installation of both the black female 1 x 10 header and the 7-blue screw terminal blocks</p></li>
+<li><p>Step no. 5: installation of the 50-Ohm reference resistor ± 0.1%</p></li>
+<li><p>Step no. 6: addition of both the ADS115 directly onto the header (pins must be plugged according to the figure) and the LM358N operational amplifiers (pay attention to the direction).</p></li>
 </ul>
 <p>1-Kohm and 1.5-Kohm resistors apply to the divider bridge. If, for example, you prefer using a weaker
 or stronger power supply, it would be possible to adjust the divider bridge value by simply modifying these resistors.
@@ -384,8 +394,9 @@ place a fuse holder with a 1.5-A fuse for safety purposes.</p>
 <p class="caption"><span class="caption-text">Measurement board installation with Raspberry Pi</span><a class="headerlink" href="#id3" title="Permalink to this image">¶</a></p>
 </div>
 </div>
-<div class="section" id="current-injection">
-<h3>Current injection<a class="headerlink" href="#current-injection" title="Permalink to this headline">¶</a></h3>
+</div>
+<div class="section" id="current-injection-board">
+<h3>Current injection board<a class="headerlink" href="#current-injection-board" title="Permalink to this headline">¶</a></h3>
 <p>To carry out the electrical resistivity measurement, the first step consists of injecting current into the ground.
 In our case, a simple 12-V lead-acid battery is used to create an electrical potential difference that results
 in current circulating into the ground. The current is injected through electrodes A and B (see Fig. 2). This
diff --git a/public/searchindex.js b/public/searchindex.js
index 287a3e28aeb5e1a93c250755e104fe938d38e82b..38bd9184ab21600375d3b54298143687bd1773bb 100644
--- a/public/searchindex.js
+++ b/public/searchindex.js
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\ No newline at end of file
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Open source and open hardware resitivity-meter","<strong>OhmPi project</strong>","OhmPi V 1.01 (limited to 32 electrodes)"],titleterms:{IDE:2,The:2,activ:2,assembl:2,bienvenu:[],board:2,card:2,center:0,cett:[],configur:2,connect:2,construct:[],current:2,data:2,descript:2,developp:[],document:0,electr:2,electrod:2,environn:2,formul:[],four:2,frist:2,hardwar:0,imag:[],implement:2,implent:2,inastal:[],indic:[],initi:2,inject:2,instal:2,instruct:2,introduct:1,lien:[],limit:2,massembl:[],measur:2,mesur:2,meter:0,modif:[],multiplex:2,ohmpi:[0,1,2],onli:2,open:0,openalea:[],oper:2,packag:2,page:[],paramet:2,philosophi:2,preliminari:2,procedur:2,project:1,python:2,rapberri:2,raspberri:2,resist:2,resit:0,run:[],second:[],sourc:0,startup:2,step:[],summari:0,sur:[],tabl:[],technic:2,text:[],thonni:2,virtual:2,welcom:[]}})
\ No newline at end of file
diff --git a/sphinx/build/doctrees/environment.pickle b/sphinx/build/doctrees/environment.pickle
index 2d360a0e12835bcce271e8e5d7cc7827d635e56b..c4ee98ce19c3ba3a8c8aecd94b4b22f499c96bae 100644
Binary files a/sphinx/build/doctrees/environment.pickle and b/sphinx/build/doctrees/environment.pickle differ
diff --git a/sphinx/build/doctrees/page1.doctree b/sphinx/build/doctrees/page1.doctree
index 2680c99c120f62aef3526d4b4fb5ac38dec44327..f407fb67bc1fe6b312e12805bc146d4ec1aa4704 100644
Binary files a/sphinx/build/doctrees/page1.doctree and b/sphinx/build/doctrees/page1.doctree differ
diff --git a/sphinx/build/html/_sources/page1.rst.txt b/sphinx/build/html/_sources/page1.rst.txt
index 117865b247da9b3ddab0648bce6f0f98e8343b97..eaf4827699b66a6a6b1bc7b2c47eca2517685698 100644
--- a/sphinx/build/html/_sources/page1.rst.txt
+++ b/sphinx/build/html/_sources/page1.rst.txt
@@ -164,11 +164,14 @@ If you decided to use a virtual environment, it is necessary to setup Thonny Pyt
 9- Close thonny to save modifications
 
  
-Measurement and Injection board developpement
-************************************************************************** 
+Assembly of the measuring/current injection cards, and connection with the Raspberry Pi
+***************************************************************************************** 
 
-Electrical resistivity measurements
-===================================
+Electrical resistivity measurements board
+==========================================
+
+a) Description
+-----------------------------
 
 To measure electrical resistivity with Raspberry Pi, an ADS1115 was introduced, as proposed by Florsch [7]. The ADS1115
 is a 16-bit ADC (Analog-to-Digital Converter), with an adaptable gain. Its value has been set at 2/3 in this study. The 
@@ -210,19 +213,21 @@ constitutes a potential hazard. We therefore recommend adding a 1.5-A fuse betwe
    :figclass: align-center
    
    Measurement board
-
-Implementation
-==============
-
+   
+b) Implementation
+--------------------------------
 The measurement board must be printed using the PCB file (Source file repository), with components soldered onto 
 it by following the steps described below and illustrated in the following figure :
 
-
 * Step no. 1: installation of the 1-Kohm resistors with an accuracy of ± 1%. 
 * Step no. 2: installation of the 1.5-Kohm resistors with an accuracy of ± 1%. 
-* Step no. 3: installation of both the black female 1 x 10 header and the 7-blue screw terminal blocks 
-* Step no. 4: installation of the 50-Ohm reference resistor ± 0.1% 
-* Step no. 5: addition of both the ADS115 directly onto the header (pins must be plugged according to the figure) and the LM358N operational amplifiers (pay attention to the direction).
+* Step no. 3: test divider bridge
+
+				UNDERconstruction
+
+* Step no. 4: installation of both the black female 1 x 10 header and the 7-blue screw terminal blocks 
+* Step no. 5: installation of the 50-Ohm reference resistor ± 0.1% 
+* Step no. 6: addition of both the ADS115 directly onto the header (pins must be plugged according to the figure) and the LM358N operational amplifiers (pay attention to the direction).
 
 1-Kohm and 1.5-Kohm resistors apply to the divider bridge. If, for example, you prefer using a weaker 
 or stronger power supply, it would be possible to adjust the divider bridge value by simply modifying these resistors. 
@@ -248,8 +253,8 @@ place a fuse holder with a 1.5-A fuse for safety purposes.
    
    Measurement board installation with Raspberry Pi
    
-Current injection 
-=================
+Current injection board
+=======================
 
 To carry out the electrical resistivity measurement, the first step consists of injecting current into the ground.
 In our case, a simple 12-V lead-acid battery is used to create an electrical potential difference that results 
diff --git a/sphinx/build/html/index.html b/sphinx/build/html/index.html
index a5ba7e04b2a976fe117e1482ccc4da1b49af2821..22914225d450fda3067492a93441c1910642c7c3 100644
--- a/sphinx/build/html/index.html
+++ b/sphinx/build/html/index.html
@@ -191,7 +191,7 @@
 <li class="toctree-l2"><a class="reference internal" href="page1.html#the-philosophy-of-ohmpi">The philosophy of Ohmpi</a></li>
 <li class="toctree-l2"><a class="reference internal" href="page1.html#technical-data">Technical data</a></li>
 <li class="toctree-l2"><a class="reference internal" href="page1.html#raspberry-pi-configuration">Raspberry Pi  configuration</a></li>
-<li class="toctree-l2"><a class="reference internal" href="page1.html#measurement-and-injection-board-developpement">Measurement and Injection board developpement</a></li>
+<li class="toctree-l2"><a class="reference internal" href="page1.html#assembly-of-the-measuring-current-injection-cards-and-connection-with-the-raspberry-pi">Assembly of the measuring/current injection cards, and connection with the Raspberry Pi</a></li>
 <li class="toctree-l2"><a class="reference internal" href="page1.html#multiplexer-implentation">Multiplexer implentation</a></li>
 <li class="toctree-l2"><a class="reference internal" href="page1.html#electrode-connection">Electrode connection</a></li>
 <li class="toctree-l2"><a class="reference internal" href="page1.html#operating-instruction">Operating instruction</a></li>
diff --git a/sphinx/build/html/page1.html b/sphinx/build/html/page1.html
index 5f6564a3c4d442decedd59e57d4662f45c37c0c9..752cd38d37546a427387cd217f1e645c87eeb75a 100644
--- a/sphinx/build/html/page1.html
+++ b/sphinx/build/html/page1.html
@@ -92,10 +92,13 @@
 <li class="toctree-l3"><a class="reference internal" href="#activate-virtual-environnement-on-thonny-python-ide-on-rapberry-pi">Activate virtual environnement on Thonny (Python IDE)  (on Rapberry Pi)</a></li>
 </ul>
 </li>
-<li class="toctree-l2"><a class="reference internal" href="#measurement-and-injection-board-developpement">Measurement and Injection board developpement</a><ul>
-<li class="toctree-l3"><a class="reference internal" href="#electrical-resistivity-measurements">Electrical resistivity measurements</a></li>
-<li class="toctree-l3"><a class="reference internal" href="#implementation">Implementation</a></li>
-<li class="toctree-l3"><a class="reference internal" href="#current-injection">Current injection</a></li>
+<li class="toctree-l2"><a class="reference internal" href="#assembly-of-the-measuring-current-injection-cards-and-connection-with-the-raspberry-pi">Assembly of the measuring/current injection cards, and connection with the Raspberry Pi</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#electrical-resistivity-measurements-board">Electrical resistivity measurements board</a><ul>
+<li class="toctree-l4"><a class="reference internal" href="#a-description">a) Description</a></li>
+<li class="toctree-l4"><a class="reference internal" href="#b-implementation">b) Implementation</a></li>
+</ul>
+</li>
+<li class="toctree-l3"><a class="reference internal" href="#current-injection-board">Current injection board</a></li>
 <li class="toctree-l3"><a class="reference internal" href="#frist-four-electrodes-resistivity-mesurement">Frist four electrodes resistivity mesurement</a></li>
 </ul>
 </li>
@@ -319,10 +322,12 @@ to leave the virtual environment simply type:</p>
 <p>9- Close thonny to save modifications</p>
 </div>
 </div>
-<div class="section" id="measurement-and-injection-board-developpement">
-<h2>Measurement and Injection board developpement<a class="headerlink" href="#measurement-and-injection-board-developpement" title="Permalink to this headline">¶</a></h2>
-<div class="section" id="electrical-resistivity-measurements">
-<h3>Electrical resistivity measurements<a class="headerlink" href="#electrical-resistivity-measurements" title="Permalink to this headline">¶</a></h3>
+<div class="section" id="assembly-of-the-measuring-current-injection-cards-and-connection-with-the-raspberry-pi">
+<h2>Assembly of the measuring/current injection cards, and connection with the Raspberry Pi<a class="headerlink" href="#assembly-of-the-measuring-current-injection-cards-and-connection-with-the-raspberry-pi" title="Permalink to this headline">¶</a></h2>
+<div class="section" id="electrical-resistivity-measurements-board">
+<h3>Electrical resistivity measurements board<a class="headerlink" href="#electrical-resistivity-measurements-board" title="Permalink to this headline">¶</a></h3>
+<div class="section" id="a-description">
+<h4>a) Description<a class="headerlink" href="#a-description" title="Permalink to this headline">¶</a></h4>
 <p>To measure electrical resistivity with Raspberry Pi, an ADS1115 was introduced, as proposed by Florsch [7]. The ADS1115
 is a 16-bit ADC (Analog-to-Digital Converter), with an adaptable gain. Its value has been set at 2/3 in this study. The
 input signal value could lie between - to + 6.114 V. The ADS1115 is mounted on a board adapted from an in-house design.
@@ -359,16 +364,21 @@ constitutes a potential hazard. We therefore recommend adding a 1.5-A fuse betwe
 <p class="caption"><span class="caption-text">Measurement board</span><a class="headerlink" href="#id1" title="Permalink to this image">¶</a></p>
 </div>
 </div>
-<div class="section" id="implementation">
-<h3>Implementation<a class="headerlink" href="#implementation" title="Permalink to this headline">¶</a></h3>
+<div class="section" id="b-implementation">
+<h4>b) Implementation<a class="headerlink" href="#b-implementation" title="Permalink to this headline">¶</a></h4>
 <p>The measurement board must be printed using the PCB file (Source file repository), with components soldered onto
 it by following the steps described below and illustrated in the following figure :</p>
-<ul class="simple">
+<ul>
 <li><p>Step no. 1: installation of the 1-Kohm resistors with an accuracy of ± 1%.</p></li>
 <li><p>Step no. 2: installation of the 1.5-Kohm resistors with an accuracy of ± 1%.</p></li>
-<li><p>Step no. 3: installation of both the black female 1 x 10 header and the 7-blue screw terminal blocks</p></li>
-<li><p>Step no. 4: installation of the 50-Ohm reference resistor ± 0.1%</p></li>
-<li><p>Step no. 5: addition of both the ADS115 directly onto the header (pins must be plugged according to the figure) and the LM358N operational amplifiers (pay attention to the direction).</p></li>
+<li><p>Step no. 3: test divider bridge</p>
+<blockquote>
+<div><p>UNDERconstruction</p>
+</div></blockquote>
+</li>
+<li><p>Step no. 4: installation of both the black female 1 x 10 header and the 7-blue screw terminal blocks</p></li>
+<li><p>Step no. 5: installation of the 50-Ohm reference resistor ± 0.1%</p></li>
+<li><p>Step no. 6: addition of both the ADS115 directly onto the header (pins must be plugged according to the figure) and the LM358N operational amplifiers (pay attention to the direction).</p></li>
 </ul>
 <p>1-Kohm and 1.5-Kohm resistors apply to the divider bridge. If, for example, you prefer using a weaker
 or stronger power supply, it would be possible to adjust the divider bridge value by simply modifying these resistors.
@@ -384,8 +394,9 @@ place a fuse holder with a 1.5-A fuse for safety purposes.</p>
 <p class="caption"><span class="caption-text">Measurement board installation with Raspberry Pi</span><a class="headerlink" href="#id3" title="Permalink to this image">¶</a></p>
 </div>
 </div>
-<div class="section" id="current-injection">
-<h3>Current injection<a class="headerlink" href="#current-injection" title="Permalink to this headline">¶</a></h3>
+</div>
+<div class="section" id="current-injection-board">
+<h3>Current injection board<a class="headerlink" href="#current-injection-board" title="Permalink to this headline">¶</a></h3>
 <p>To carry out the electrical resistivity measurement, the first step consists of injecting current into the ground.
 In our case, a simple 12-V lead-acid battery is used to create an electrical potential difference that results
 in current circulating into the ground. The current is injected through electrodes A and B (see Fig. 2). This
diff --git a/sphinx/build/html/searchindex.js b/sphinx/build/html/searchindex.js
index 287a3e28aeb5e1a93c250755e104fe938d38e82b..38bd9184ab21600375d3b54298143687bd1773bb 100644
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diff --git a/sphinx/source/page1.rst b/sphinx/source/page1.rst
index 117865b247da9b3ddab0648bce6f0f98e8343b97..eaf4827699b66a6a6b1bc7b2c47eca2517685698 100644
--- a/sphinx/source/page1.rst
+++ b/sphinx/source/page1.rst
@@ -164,11 +164,14 @@ If you decided to use a virtual environment, it is necessary to setup Thonny Pyt
 9- Close thonny to save modifications
 
  
-Measurement and Injection board developpement
-************************************************************************** 
+Assembly of the measuring/current injection cards, and connection with the Raspberry Pi
+***************************************************************************************** 
 
-Electrical resistivity measurements
-===================================
+Electrical resistivity measurements board
+==========================================
+
+a) Description
+-----------------------------
 
 To measure electrical resistivity with Raspberry Pi, an ADS1115 was introduced, as proposed by Florsch [7]. The ADS1115
 is a 16-bit ADC (Analog-to-Digital Converter), with an adaptable gain. Its value has been set at 2/3 in this study. The 
@@ -210,19 +213,21 @@ constitutes a potential hazard. We therefore recommend adding a 1.5-A fuse betwe
    :figclass: align-center
    
    Measurement board
-
-Implementation
-==============
-
+   
+b) Implementation
+--------------------------------
 The measurement board must be printed using the PCB file (Source file repository), with components soldered onto 
 it by following the steps described below and illustrated in the following figure :
 
-
 * Step no. 1: installation of the 1-Kohm resistors with an accuracy of ± 1%. 
 * Step no. 2: installation of the 1.5-Kohm resistors with an accuracy of ± 1%. 
-* Step no. 3: installation of both the black female 1 x 10 header and the 7-blue screw terminal blocks 
-* Step no. 4: installation of the 50-Ohm reference resistor ± 0.1% 
-* Step no. 5: addition of both the ADS115 directly onto the header (pins must be plugged according to the figure) and the LM358N operational amplifiers (pay attention to the direction).
+* Step no. 3: test divider bridge
+
+				UNDERconstruction
+
+* Step no. 4: installation of both the black female 1 x 10 header and the 7-blue screw terminal blocks 
+* Step no. 5: installation of the 50-Ohm reference resistor ± 0.1% 
+* Step no. 6: addition of both the ADS115 directly onto the header (pins must be plugged according to the figure) and the LM358N operational amplifiers (pay attention to the direction).
 
 1-Kohm and 1.5-Kohm resistors apply to the divider bridge. If, for example, you prefer using a weaker 
 or stronger power supply, it would be possible to adjust the divider bridge value by simply modifying these resistors. 
@@ -248,8 +253,8 @@ place a fuse holder with a 1.5-A fuse for safety purposes.
    
    Measurement board installation with Raspberry Pi
    
-Current injection 
-=================
+Current injection board
+=======================
 
 To carry out the electrical resistivity measurement, the first step consists of injecting current into the ground.
 In our case, a simple 12-V lead-acid battery is used to create an electrical potential difference that results