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<!DOCTYPE html><html lang="en"><head><meta content="width=device-width, initial-scale=1.0" name="viewport"/><meta charset="utf-8"/><title>OHMPI: Open source and open hardware resitivity-meter | Ohmpi: open hardware resistivity-meter documentation</title><link href="_static/pygments.css" rel="stylesheet"/><link href="_static/theme.313ea551d1799b2102b1.css" rel="stylesheet"/><link href="search.html" rel="search" title="Search"/><link href="genindex.html" rel="index" title="Index"/><link href="Ohmpi.html" rel="next" title="OhmPi project"/></head><body class="antialiased text-gray"><div class="h-screen xl:grid xl:grid-layout" data-action="keydown@window->search#focus" data-controller="sidebar search" id="page"><a class="block text-xl bg-white py-4 z-20 absolute top-0 h-18 inset-x-0 text-center transform -translate-y-full focus:translate-y-0 focus:outline-none transition-transform duration-75" href="#ohmpi-open-source-and-open-hardware-resitivity-meter" title="Skip navigation links">Skip to 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4.59L10 18l6-6z"></path></svg><a class="reference internal" data-action="click->sidebar#close" href="V1_01.html">OhmPi V 1.01 (limited to 32 electrodes)</a></div><ul><li class="toctree-l2"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_01.html#the-philosophy-of-ohmpi">The philosophy of Ohmpi</a></div></li><li class="toctree-l2"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_01.html#technical-data">Technical data</a></div></li><li class="toctree-l2"><div class="nav-link"><svg class="expand" data-action="click->sidebar#expand keydown->sidebar#expandKeyPressed" tabindex="0" viewbox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path d="M10 6L8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"></path></svg><a class="reference internal" data-action="click->sidebar#close" href="V1_01.html#raspberry-pi-configuration">Raspberry Pi configuration</a></div><ul><li class="toctree-l3"><div class="nav-link"><a 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href="V1_01.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></div><ul><li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_01.html#electrical-resistivity-measurements-board">Electrical resistivity measurements board</a></div></li><li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_01.html#current-injection-board">Current injection board</a></div></li><li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_01.html#frist-four-electrodes-resistivity-mesurement">Frist four electrodes resistivity mesurement</a></div></li></ul></li><li class="toctree-l2"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_01.html#multiplexer-implentation">Multiplexer implentation</a></div></li><li class="toctree-l2"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_01.html#electrode-connection">Electrode connection</a></div></li><li class="toctree-l2"><div class="nav-link"><svg class="expand" data-action="click->sidebar#expand keydown->sidebar#expandKeyPressed" tabindex="0" viewbox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path d="M10 6L8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"></path></svg><a class="reference internal" data-action="click->sidebar#close" href="V1_01.html#operating-instruction">Operating instruction</a></div><ul><li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_01.html#preliminary-procedure-only-for-the-initial-operation">Preliminary procedure (Only for the initial operation)</a></div></li><li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_01.html#startup-procedure">Startup procedure</a></div></li><li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_01.html#electrical-resistivity-measurement-parameters-description">Electrical resistivity measurement parameters description</a></div></li></ul></li><li class="toctree-l2"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_01.html#complete-list-of-components">Complete list of components</a></div></li></ul></li><li class="toctree-l1"><div class="nav-link"><svg class="expand" data-action="click->sidebar#expand keydown->sidebar#expandKeyPressed" tabindex="0" viewbox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path d="M10 6L8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"></path></svg><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html">OhmPi V 1.02 (limited to 32 electrodes)</a></div><ul><li class="toctree-l2"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html#the-philosophy-of-ohmpi">The philosophy of Ohmpi</a></div></li>7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
<li class="toctree-l2"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html#technical-data">Technical data</a></div></li>
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<li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html#os-installation">OS installation</a></div></li>
<li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html#virtual-environnement-and-packages">Virtual Environnement and packages</a></div></li>
<li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html#activate-virtual-environnement-on-thonny-python-ide-on-rapberry-pi">Activate virtual environnement on Thonny (Python IDE) (on Rapberry Pi)</a></div></li>
</ul>
</li>
<li class="toctree-l2"><div class="nav-link"><svg class="expand" data-action="click->sidebar#expand keydown->sidebar#expandKeyPressed" tabindex="0" viewbox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path d="M10 6L8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"></path></svg><a class="reference internal" data-action="click->sidebar#close" href="V1_02.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></div><ul>
<li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html#electrical-resistivity-measurements-board">Electrical resistivity measurements board</a></div></li>
<li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html#current-injection-board">Current injection board</a></div></li>
<li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html#frist-four-electrodes-resistivity-mesurement">Frist four electrodes resistivity mesurement</a></div></li>
</ul>
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<li class="toctree-l2"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html#multiplexer-implentation">Multiplexer implentation</a></div></li>
<li class="toctree-l2"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html#electrode-connection">Electrode connection</a></div></li>
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<li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html#preliminary-procedure-only-for-the-initial-operation">Preliminary procedure (Only for the initial operation)</a></div></li>
<li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html#startup-procedure">Startup procedure</a></div></li>
<li class="toctree-l3"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html#electrical-resistivity-measurement-parameters-description">Electrical resistivity measurement parameters description</a></div></li>
</ul>
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<li class="toctree-l2"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V1_02.html#complete-list-of-components">Complete list of components</a></div></li>
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<li class="toctree-l2"><div class="nav-link"><a class="reference internal" data-action="click->sidebar#close" href="V2_00.html#the-philosophy-of-ohmpi">The philosophy of Ohmpi</a></div></li>
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<div class="section" id="ohmpi-open-source-and-open-hardware-resitivity-meter">
<h1>OHMPI: Open source and open hardware resitivity-meter<a aria-label="Click to copy this link" class="headerlink tooltipped tooltipped-ne tooltipped tooltipped-ne" data-action="click->clipboard#copyHeaderLink" data-controller="clipboard" href="#ohmpi-open-source-and-open-hardware-resitivity-meter">¶</a></h1>
<div class="sidebar">
<p class="sidebar-title">Summary</p>
<dl class="field-list simple">
<dt class="field-odd">Release</dt>
<dd class="field-odd"><p>open hardware resistivity-meter</p>
</dd>
<dt class="field-even">Date</dt>
<dd class="field-even"><p>Feb 08, 2022</p>
</dd>
<dt class="field-odd">Date start</dt>
<dd class="field-odd"><p>July 2016</p>
</dd>
<dt class="field-even">Authors</dt>
<dd class="field-even"><p><strong>Rémi CLEMENT, Nicolas FORQUET, Julien GANCE, Yannick FARGIER, Vivien DUBOIS, Hélène GUYARD, Olivier KAUFMANN</strong></p>
</dd>
<dt class="field-odd">Target</dt>
<dd class="field-odd"><p>users, researchers and developers</p>
</dd>
<dt class="field-even">status</dt>
<dd class="field-even"><p>some mature, some in progress</p>
</dd>
</dl>
</div>
<div class="topic">
<p class="topic-title first">OhmPi Document Center</p>
<ul class="simple">
<li><p>OhmPi offcial documents</p></li>
141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210
<li><p>Release guidelines</p></li>
<li><p>General tutorials</p></li>
</ul>
</div>
<a class="reference internal image-reference" href="_images/logo_ohmpi.JPG"><img alt="_images/logo_ohmpi.JPG" class="align-center" src="_images/logo_ohmpi.JPG" style="width: 200px; height: 150px;"/></a>
<p>Contents:</p>
<div class="toctree-wrapper compound">
<ul>
<li class="toctree-l1"><a class="reference internal" href="Ohmpi.html">OhmPi project</a><ul>
<li class="toctree-l2"><a class="reference internal" href="Ohmpi.html#partenaires"><strong>Partenaires</strong></a><ul>
<li class="toctree-l3"><a class="reference internal" href="Ohmpi.html#citing-ohmpi"><strong>Citing OhmPi</strong></a></li>
<li class="toctree-l3"><a class="reference internal" href="Ohmpi.html#introduction-to-ohmpi"><strong>Introduction to OhmPi</strong></a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="V1_01.html">OhmPi V 1.01 (limited to 32 electrodes)</a><ul>
<li class="toctree-l2"><a class="reference internal" href="V1_01.html#the-philosophy-of-ohmpi">The philosophy of Ohmpi</a></li>
<li class="toctree-l2"><a class="reference internal" href="V1_01.html#technical-data">Technical data</a></li>
<li class="toctree-l2"><a class="reference internal" href="V1_01.html#raspberry-pi-configuration">Raspberry Pi configuration</a><ul>
<li class="toctree-l3"><a class="reference internal" href="V1_01.html#os-installation">OS installation</a></li>
<li class="toctree-l3"><a class="reference internal" href="V1_01.html#virtual-environnement-and-packages">Virtual Environnement and packages</a></li>
<li class="toctree-l3"><a class="reference internal" href="V1_01.html#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="V1_01.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><ul>
<li class="toctree-l3"><a class="reference internal" href="V1_01.html#electrical-resistivity-measurements-board">Electrical resistivity measurements board</a></li>
<li class="toctree-l3"><a class="reference internal" href="V1_01.html#current-injection-board">Current injection board</a></li>
<li class="toctree-l3"><a class="reference internal" href="V1_01.html#frist-four-electrodes-resistivity-mesurement">Frist four electrodes resistivity mesurement</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="V1_01.html#multiplexer-implentation">Multiplexer implentation</a></li>
<li class="toctree-l2"><a class="reference internal" href="V1_01.html#electrode-connection">Electrode connection</a></li>
<li class="toctree-l2"><a class="reference internal" href="V1_01.html#operating-instruction">Operating instruction</a><ul>
<li class="toctree-l3"><a class="reference internal" href="V1_01.html#preliminary-procedure-only-for-the-initial-operation">Preliminary procedure (Only for the initial operation)</a></li>
<li class="toctree-l3"><a class="reference internal" href="V1_01.html#startup-procedure">Startup procedure</a></li>
<li class="toctree-l3"><a class="reference internal" href="V1_01.html#electrical-resistivity-measurement-parameters-description">Electrical resistivity measurement parameters description</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="V1_01.html#complete-list-of-components">Complete list of components</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="V1_02.html">OhmPi V 1.02 (limited to 32 electrodes)</a><ul>
<li class="toctree-l2"><a class="reference internal" href="V1_02.html#the-philosophy-of-ohmpi">The philosophy of Ohmpi</a></li>
<li class="toctree-l2"><a class="reference internal" href="V1_02.html#technical-data">Technical data</a></li>
<li class="toctree-l2"><a class="reference internal" href="V1_02.html#raspberry-pi-configuration">Raspberry Pi configuration</a><ul>
<li class="toctree-l3"><a class="reference internal" href="V1_02.html#os-installation">OS installation</a></li>
<li class="toctree-l3"><a class="reference internal" href="V1_02.html#virtual-environnement-and-packages">Virtual Environnement and packages</a></li>
<li class="toctree-l3"><a class="reference internal" href="V1_02.html#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="V1_02.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><ul>
<li class="toctree-l3"><a class="reference internal" href="V1_02.html#electrical-resistivity-measurements-board">Electrical resistivity measurements board</a></li>
<li class="toctree-l3"><a class="reference internal" href="V1_02.html#current-injection-board">Current injection board</a></li>
<li class="toctree-l3"><a class="reference internal" href="V1_02.html#frist-four-electrodes-resistivity-mesurement">Frist four electrodes resistivity mesurement</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="V1_02.html#multiplexer-implentation">Multiplexer implentation</a></li>
<li class="toctree-l2"><a class="reference internal" href="V1_02.html#electrode-connection">Electrode connection</a></li>
<li class="toctree-l2"><a class="reference internal" href="V1_02.html#operating-instruction">Operating instruction</a><ul>
<li class="toctree-l3"><a class="reference internal" href="V1_02.html#preliminary-procedure-only-for-the-initial-operation">Preliminary procedure (Only for the initial operation)</a></li>
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<li class="toctree-l3"><a class="reference internal" href="V1_02.html#electrical-resistivity-measurement-parameters-description">Electrical resistivity measurement parameters description</a></li>
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<li class="toctree-l1"><a class="reference internal" href="V2_00.html">OhmPi V 2.00 (64 electrodes and 12V)</a><ul>
<li class="toctree-l2"><a class="reference internal" href="V2_00.html#the-philosophy-of-ohmpi">The philosophy of Ohmpi</a></li>
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<li class="toctree-l2"><a class="reference internal" href="V2_00.html#technical-data">Technical data</a><ul>
<li class="toctree-l3"><a class="reference internal" href="V2_00.html#ohmpi-2-step-by-step">Ohmpi 2 step by step</a></li>
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