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<!DOCTYPE html><html class="writer-html5" lang="en" ><head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>STEP n°3: MUX board — Ohmpi: open hardware resistivity-meter documentation</title><link rel="stylesheet" href="../_static/css/theme.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <!--[if lt IE 9]> <script src="../_static/js/html5shiv.min.js"></script> <![endif]--> <script id="documentation_options" data-url_root="../" src="../_static/documentation_options.js"></script> <script src="../_static/jquery.js"></script> <script src="../_static/underscore.js"></script> <script src="../_static/doctools.js"></script> <script src="../_static/language_data.js"></script> <script async="async" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.7/latest.js?config=TeX-AMS-MML_HTMLorMML"></script> <script src="../_static/js/theme.js"></script> <link rel="index" title="Index" href="../genindex.html" /> <link rel="search" title="Search" href="../search.html" /> <link rel="prev" title="STEP n°2: Measurement board" href="V2_00_step_02.html" /> </head><body class="wy-body-for-nav"> <div class="wy-grid-for-nav"> <nav data-toggle="wy-nav-shift" class="wy-nav-side"> <div class="wy-side-scroll"> <div class="wy-side-nav-search" > <a href="../index.html" class="icon icon-home"> Ohmpi: </a><div role="search"> <form id="rtd-search-form" class="wy-form" action="../search.html" method="get"> <input type="text" name="q" placeholder="Search docs" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form></div> </div><div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="Navigation menu"> <ul class="current"><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 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"><li class="toctree-l3"><a class="reference internal" href="V2_00_step_01.html"><strong>STEP n°1</strong> : Raspberry Pi configuration</a></li><li class="toctree-l3"><a class="reference internal" href="V2_00_step_02.html"><strong>STEP n°2</strong>: Measurement board</a></li><li class="toctree-l3 current"><a class="current reference internal" href="#"><strong>STEP n°3</strong>: MUX board</a><ul><li class="toctree-l4"><a class="reference internal" href="#part-a-assembly-of-mux-board"><strong>PART A</strong> Assembly of MUX board</a></li><li class="toctree-l4"><a class="reference internal" href="#part-b-mux-board-address"><strong>PART B</strong> MUX board address</a></li></ul></li></ul></li></ul></li></ul> </div> </div> </nav> <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"><nav class="wy-nav-top" aria-label="Mobile navigation menu" > <i data-toggle="wy-nav-top" class="fa fa-bars"></i> <a href="../index.html">Ohmpi:</a> </nav> <div class="wy-nav-content"> <div class="rst-content"> <div role="navigation" aria-label="Page navigation">7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
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<div class="section" id="step-n3-mux-board">
<h1><strong>STEP n°3</strong>: MUX board<a class="headerlink" href="#step-n3-mux-board" title="Permalink to this headline">¶</a></h1>
<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.
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>
<div class="section" id="part-a-assembly-of-mux-board">
<h2><strong>PART A</strong> Assembly of MUX board<a class="headerlink" href="#part-a-assembly-of-mux-board" title="Permalink to this headline">¶</a></h2>
<div class="section" id="required-components">
<h3>Required components<a class="headerlink" href="#required-components" title="Permalink to this headline">¶</a></h3>
<div class="align-center figure">
<a class="reference internal image-reference" href="../_images/MUX_board_componement.jpg"><img alt="alternate text" src="../_images/MUX_board_componement.jpg" style="width: 600px; height: 650px;" /></a>
</div>
<table class="colwidths-given docutils align-default" id="id1">
<caption><span class="caption-text">List of components</span><a class="headerlink" href="#id1" title="Permalink to this table">¶</a></caption>
<colgroup>
<col style="width: 8%" />
<col style="width: 18%" />
<col style="width: 18%" />
<col style="width: 18%" />
<col style="width: 18%" />
<col style="width: 9%" />
<col style="width: 9%" />
</colgroup>
<thead>
<tr class="row-odd"><th class="head"><p>Component</p></th>
<th class="head"><p>Number</p></th>
<th class="head"><p>Cost per unit €</p></th>
<th class="head"><p>Total cost €</p></th>
<th class="head"><p>Manufacturer</p></th>
<th class="head"><p>Manufacturer s reference</p></th>
<th class="head"><p>Web reference</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p>Printed circuit board</p></td>
<td><p>4</p></td>
<td><p>140</p></td>
<td><p>560</p></td>
<td><p>Asler</p></td>
<td><ul class="simple">
<li></li>
</ul>
</td>
<td><ul class="simple">
<li></li>
</ul>
</td>
</tr>
<tr class="row-odd"><td><p>Pin strip no ejector 16 pins</p></td>
<td><p>16</p></td>
<td><p>0.62</p></td>
<td><p>9.92</p></td>
<td><p>BLK electronic</p></td>
<td><p>10120550</p></td>
141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210
<td><p><a class="reference external" href="https://www.conrad.com/p/tru-components-1580994-pin-strip-no-ejector-contact-spacing-254-mm-total-number-of-pins-16-no-of-rows-2-1-pcs-1580994">https://www.conrad.com/p/tru-components-1580994-pin-strip-no-ejector-contact-spacing-254-mm-total-number-of-pins-16-no-of-rows-2-1-pcs-1580994</a></p></td>
</tr>
<tr class="row-even"><td><p>diode-1n4007</p></td>
<td><p>256</p></td>
<td><p>0.091</p></td>
<td><p>23.296</p></td>
<td><p>Diodes Incorporated</p></td>
<td><p>1N4007-T</p></td>
<td><p><a class="reference external" href="https://www.mouser.fr/ProductDetail/Diodes-Incorporated/1N4007-T?qs=sGAEpiMZZMueQxo7L%2FBPyAkbORUUMREn">https://www.mouser.fr/ProductDetail/Diodes-Incorporated/1N4007-T?qs=sGAEpiMZZMueQxo7L%2FBPyAkbORUUMREn</a></p></td>
</tr>
<tr class="row-odd"><td><p>Pin strip no ejector 6 pins</p></td>
<td><p>4</p></td>
<td><p>0.39</p></td>
<td><p>1.56</p></td>
<td><p>BLK electronic</p></td>
<td><p>10120550</p></td>
<td><p><a class="reference external" href="https://www.conrad.com/p/tru-components-1580994-pin-strip-no-ejector-contact-spacing-254-mm-total-number-of-pins-16-no-of-rows-2-1-pcs-1580994">https://www.conrad.com/p/tru-components-1580994-pin-strip-no-ejector-contact-spacing-254-mm-total-number-of-pins-16-no-of-rows-2-1-pcs-1580994</a></p></td>
</tr>
<tr class="row-even"><td><p>Dual screw terminal (5.08-mm pitch)</p></td>
<td><p>12</p></td>
<td><p>0.648</p></td>
<td><p>7.776</p></td>
<td><p>CUI Devices</p></td>
<td><p>TB009-508-02BE</p></td>
<td><p><a class="reference external" href="https://www.mouser.fr/ProductDetail/CUI-Devices/TB009-508-02BE?qs=vLWxofP3U2wCFk5uCkWTkA%3D%3D">https://www.mouser.fr/ProductDetail/CUI-Devices/TB009-508-02BE?qs=vLWxofP3U2wCFk5uCkWTkA%3D%3D</a></p></td>
</tr>
<tr class="row-odd"><td><p>Generic male header - 3 pins</p></td>
<td><p>12</p></td>
<td><p>0.205</p></td>
<td><p>2.46</p></td>
<td><p>TE Connectivity</p></td>
<td><p>4-103321-5</p></td>
<td><p><a class="reference external" href="https://www.mouser.fr/ProductDetail/TE-Connectivity/4-103321-5?qs=5TwgZeq9E7HSYLqaljJYrw%3D%3D">https://www.mouser.fr/ProductDetail/TE-Connectivity/4-103321-5?qs=5TwgZeq9E7HSYLqaljJYrw%3D%3D</a></p></td>
</tr>
<tr class="row-even"><td><p>MCP23017 I2C I/O Expander</p></td>
<td><p>16</p></td>
<td><p>2.5</p></td>
<td><p>40</p></td>
<td><p>Adafruit</p></td>
<td><p>732</p></td>
<td><p><a class="reference external" href="https://www.mouser.fr/ProductDetail/Adafruit/732?qs=sGAEpiMZZMsKEdP9slC0Yfx16nYdMpXJueeOGoLBlDI%3D">https://www.mouser.fr/ProductDetail/Adafruit/732?qs=sGAEpiMZZMsKEdP9slC0Yfx16nYdMpXJueeOGoLBlDI%3D</a></p></td>
</tr>
<tr class="row-odd"><td><p>Omron G5LE-1-VD 12 VDC PCB relay 12 V DC 8 A 1</p></td>
<td><p>256</p></td>
<td><p>1.27</p></td>
<td><p>325.12</p></td>
<td><p>Omron</p></td>
<td><p>G5LE-1-VD 12 VDC</p></td>
<td><p><a class="reference external" href="https://www.conrad.com/p/omron-g5le-1-vd-12-vdc-pcb-relay-12-v-dc-8-a-1-change-over-1-pcs-503811">https://www.conrad.com/p/omron-g5le-1-vd-12-vdc-pcb-relay-12-v-dc-8-a-1-change-over-1-pcs-503811</a></p></td>
</tr>
<tr class="row-even"><td><p>ZVN4206A MOSFET-NCHANNEL</p></td>
<td><p>256</p></td>
<td><p>0.471</p></td>
<td><p>120.576</p></td>
<td><p>Diodes Incorporated</p></td>
<td><p>ZVN4206A</p></td>
<td><p><a class="reference external" href="https://www.mouser.fr/ProductDetail/Diodes-Incorporated/ZVN4206A?qs=vHuUswq2%252Bsz9b%2Ff6fcXt7g%3D%3D">https://www.mouser.fr/ProductDetail/Diodes-Incorporated/ZVN4206A?qs=vHuUswq2%252Bsz9b%2Ff6fcXt7g%3D%3D</a></p></td>
</tr>
<tr class="row-odd"><td><p>100k? Resistor</p></td>
<td><p>256</p></td>
<td><p>0.061</p></td>
<td><p>15.616</p></td>
<td><p>Vishay / Beyschlag</p></td>
<td><p>MBA02040C1003FRP00</p></td>
<td><p><a class="reference external" href="https://www.mouser.fr/ProductDetail/Vishay-Beyschlag/MBA02040C1003FRP00?qs=mzRxyRlhVdt9crF7Zyf%2F5Q%3D%3D">https://www.mouser.fr/ProductDetail/Vishay-Beyschlag/MBA02040C1003FRP00?qs=mzRxyRlhVdt9crF7Zyf%2F5Q%3D%3D</a></p></td>
</tr>
<tr class="row-even"><td><p>Adafruit TCA9548A</p></td>
<td><p>4</p></td>
<td><p>5.89</p></td>
<td><p>23.56</p></td>
211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280
<td><p>Adafruit</p></td>
<td><p>2717</p></td>
<td><p><a class="reference external" href="https://www.mouser.fr/ProductDetail/Adafruit/2717?qs=sGAEpiMZZMsyYdr3R27aV4EQf73yOH%252Baqg%252BZ3hVktao%3D">https://www.mouser.fr/ProductDetail/Adafruit/2717?qs=sGAEpiMZZMsyYdr3R27aV4EQf73yOH%252Baqg%252BZ3hVktao%3D</a></p></td>
</tr>
<tr class="row-odd"><td><p>BKL Electronic 10120558 Pin strip no ejector Contact spacing: 2.54 mm Total number of pins: 16 No. of rows: 2 1 pc(s)</p></td>
<td><p>16</p></td>
<td><p>0.51</p></td>
<td><p>8.16</p></td>
<td><p>BLK electronic</p></td>
<td><p>10120558</p></td>
<td><p><a class="reference external" href="https://www.conrad.com/p/bkl-electronic-10120558-pin-strip-no-ejector-contact-spacing-254-mm-total-number-of-pins-16-no-of-rows-2-1-pcs-741727?searchTerm=741727&searchType=suggest&searchSuggest=product">https://www.conrad.com/p/bkl-electronic-10120558-pin-strip-no-ejector-contact-spacing-254-mm-total-number-of-pins-16-no-of-rows-2-1-pcs-741727?searchTerm=741727&searchType=suggest&searchSuggest=product</a></p></td>
</tr>
<tr class="row-even"><td><p>BKL Electronic 10120862 Pin connector + strain relief Contact spacing: 2.54 mm Total number of pins: 6 No. of rows: 2 1</p></td>
<td><p>16</p></td>
<td><p>0.84</p></td>
<td><p>13.44</p></td>
<td><p>BLK electronic</p></td>
<td><p>10120862</p></td>
<td><p><a class="reference external" href="https://www.conrad.com/p/bkl-electronic-10120862-pin-connector-strain-relief-contact-spacing-254-mm-total-number-of-pins-6-no-of-rows-2-1-742063">https://www.conrad.com/p/bkl-electronic-10120862-pin-connector-strain-relief-contact-spacing-254-mm-total-number-of-pins-6-no-of-rows-2-1-742063</a></p></td>
</tr>
<tr class="row-odd"><td><p>BKL Electronic 10120158/10 Ribbon cable Contact spacing: 1.27 mm 16 x 0.08 mm Multi-coloured 10 m</p></td>
<td><p>1</p></td>
<td><p>27</p></td>
<td><p>27</p></td>
<td><p>BLK electronic</p></td>
<td><p>10120158/10</p></td>
<td><p><a class="reference external" href="https://www.conrad.com/p/bkl-electronic-1012015810-ribbon-cable-contact-spacing-127-mm-16-x-008-mm-multi-coloured-10-m-1548658?searchTerm=1548658&searchType=suggest&searchSuggest=product">https://www.conrad.com/p/bkl-electronic-1012015810-ribbon-cable-contact-spacing-127-mm-16-x-008-mm-multi-coloured-10-m-1548658?searchTerm=1548658&searchType=suggest&searchSuggest=product</a></p></td>
</tr>
<tr class="row-even"><td><p>spacer 5.5 HEX 25 mm M3 male/female</p></td>
<td><p>31</p></td>
<td><p>2.79</p></td>
<td><p>86.49</p></td>
<td><p>Keystone Electronics</p></td>
<td><p>24300</p></td>
<td><p><a class="reference external" href="https://www.mouser.fr/ProductDetail/Keystone-Electronics/24300?qs=UWqYQ%2F2cZWu0ejpOzmZC2A%3D%3D">https://www.mouser.fr/ProductDetail/Keystone-Electronics/24300?qs=UWqYQ%2F2cZWu0ejpOzmZC2A%3D%3D</a></p></td>
</tr>
<tr class="row-odd"><td><p>Screw</p></td>
<td><p>9</p></td>
<td><p>0.305</p></td>
<td><p>2.745</p></td>
<td><p>APM HEXSEAL</p></td>
<td><p>RM3X8MM-2701</p></td>
<td><p><a class="reference external" href="https://www.mouser.fr/ProductDetail/APM-HEXSEAL/RM3X8MM-2701?qs=JJSE%2F12mKnS3VxSDrYXUHw%3D%3D">https://www.mouser.fr/ProductDetail/APM-HEXSEAL/RM3X8MM-2701?qs=JJSE%2F12mKnS3VxSDrYXUHw%3D%3D</a></p></td>
</tr>
<tr class="row-even"><td><p>spacer 5.5 HEX 25 mm M3 female/female</p></td>
<td><p>9</p></td>
<td><p>0.846</p></td>
<td><p>7.614</p></td>
<td><p>Keystone Electronics</p></td>
<td><p>25515</p></td>
<td><p><a class="reference external" href="https://www.mouser.fr/ProductDetail/Keystone-Electronics/25515?qs=UWqYQ%2F2cZWuxuhUmfr%252BZuQ%3D%3D">https://www.mouser.fr/ProductDetail/Keystone-Electronics/25515?qs=UWqYQ%2F2cZWuxuhUmfr%252BZuQ%3D%3D</a></p></td>
</tr>
</tbody>
</table>
<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>Mux board pcb</p></td>
</tr>
</tbody>
</table>
<table class="docutils align-center">
<colgroup>
281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350
<col style="width: 12%" />
<col style="width: 88%" />
</colgroup>
<tbody>
<tr class="row-odd"><td rowspan="2"><p>2</p></td>
<td><img alt="../_images/MUX_01.jpg" src="../_images/MUX_01.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Installation of the 150 Kohm resistors</p></td>
</tr>
</tbody>
</table>
<table class="docutils align-center">
<colgroup>
<col style="width: 12%" />
<col style="width: 88%" />
</colgroup>
<tbody>
<tr class="row-odd"><td rowspan="2"><p>3</p></td>
<td><img alt="../_images/MUX_02.jpg" src="../_images/MUX_02.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Installation of the mosfet ZVN4206A</p></td>
</tr>
</tbody>
</table>
<table class="docutils align-center">
<colgroup>
<col style="width: 12%" />
<col style="width: 88%" />
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<tbody>
<tr class="row-odd"><td rowspan="2"><p>4</p></td>
<td><img alt="../_images/MUX_03.jpg" src="../_images/MUX_03.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Installation of the diode-1n4007</p></td>
</tr>
</tbody>
</table>
<table class="docutils align-center">
<colgroup>
<col style="width: 12%" />
<col style="width: 88%" />
</colgroup>
<tbody>
<tr class="row-odd"><td rowspan="2"><p>5</p></td>
<td><img alt="../_images/MUX_04.jpg" src="../_images/MUX_04.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Installation of the relay</p></td>
</tr>
</tbody>
</table>
<table class="docutils align-center">
<colgroup>
<col style="width: 12%" />
<col style="width: 88%" />
</colgroup>
<tbody>
<tr class="row-odd"><td rowspan="2"><p>6</p></td>
<td><img alt="../_images/MUX_05.jpg" src="../_images/MUX_05.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Instalation of the terminal screw</p></td>
</tr>
</tbody>
</table>
<table class="docutils align-center">
<colgroup>
351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420
<col style="width: 12%" />
<col style="width: 88%" />
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<tbody>
<tr class="row-odd"><td rowspan="2"><p>7</p></td>
<td><img alt="../_images/MUX_06.jpg" src="../_images/MUX_06.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Installation of generic male header</p></td>
</tr>
</tbody>
</table>
<table class="docutils align-center">
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<col style="width: 12%" />
<col style="width: 88%" />
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<tr class="row-odd"><td rowspan="2"><p>8</p></td>
<td><img alt="../_images/MUX_07.jpg" src="../_images/MUX_07.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Installation of Pin strip (6 pins) and pin strip (16 pins)</p></td>
</tr>
</tbody>
</table>
<table class="docutils align-center">
<colgroup>
<col style="width: 12%" />
<col style="width: 88%" />
</colgroup>
<tbody>
<tr class="row-odd"><td rowspan="2"><p>9</p></td>
<td><img alt="../_images/MUX_08.jpg" src="../_images/MUX_08.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Installation of DIP Dual In Line Socket 2*14</p></td>
</tr>
</tbody>
</table>
<table class="docutils align-center">
<colgroup>
<col style="width: 12%" />
<col style="width: 88%" />
</colgroup>
<tbody>
<tr class="row-odd"><td rowspan="2"><p>10</p></td>
<td><img alt="../_images/MUX_09.jpg" src="../_images/MUX_09.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Installation of Adafruit TCA9548A</p></td>
</tr>
</tbody>
</table>
<table class="docutils align-center">
<colgroup>
<col style="width: 12%" />
<col style="width: 88%" />
</colgroup>
<tbody>
<tr class="row-odd"><td rowspan="2"><p>10</p></td>
<td><img alt="../_images/MUX_10.jpg" src="../_images/MUX_10.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Installation of MCP23017</p></td>
</tr>
</tbody>
</table>
<div class="admonition note">
<p class="admonition-title">Note</p>
421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490
<p>This step must be duplicated 4 times for every Mux card.</p>
</div>
</div>
</div>
<div class="section" id="part-b-mux-board-address">
<h2><strong>PART B</strong> MUX board address<a class="headerlink" href="#part-b-mux-board-address" title="Permalink to this headline">¶</a></h2>
<p>To build an ohmpi it is necessary to have 4 MUX boards, with 4 different addresses. It is therefore necessary to identify each board, by assigning an address, which will be allocated in the Ohmpi code.
We present here the addresses selected by default.</p>
<p>For the A electrode board, we suggest addressing it with address 0x70:</p>
<table class="docutils align-center">
<colgroup>
<col style="width: 12%" />
<col style="width: 88%" />
</colgroup>
<tbody>
<tr class="row-odd"><td rowspan="4"><p>1</p></td>
<td><img alt="../_images/A_0x70.jpg" src="../_images/A_0x70.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Mount the jumpers and note the value of the address and the
electrode name on the mux board (A).</p></td>
</tr>
<tr class="row-odd"><td><img alt="../_images/A_0x70-a.jpg" src="../_images/A_0x70-a.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Zoom on the jumper</p></td>
</tr>
</tbody>
</table>
<p>For the B electrode board, we suggest addressing it with address 0x71:</p>
<table class="docutils align-center">
<colgroup>
<col style="width: 12%" />
<col style="width: 88%" />
</colgroup>
<tbody>
<tr class="row-odd"><td rowspan="4"><p>2</p></td>
<td><img alt="../_images/B_0x71.jpg" src="../_images/B_0x71.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Mount the jumpers and note the value of the address and the
electrode name on the mux board (B).</p></td>
</tr>
<tr class="row-odd"><td><img alt="../_images/B_0x71-a.jpg" src="../_images/B_0x71-a.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Zoom on the jumper</p></td>
</tr>
</tbody>
</table>
<p>For the N electrode board, we suggest addressing it with address 0x72:</p>
<table class="docutils align-center">
<colgroup>
<col style="width: 12%" />
<col style="width: 88%" />
</colgroup>
<tbody>
<tr class="row-odd"><td rowspan="4"><p>3</p></td>
<td><img alt="../_images/M_0x72.jpg" src="../_images/M_0x72.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Mount the jumpers and note the value of the address and the
electrode name on the mux board (B).</p></td>
</tr>
<tr class="row-odd"><td><img alt="../_images/M_0x72-a.jpg" src="../_images/M_0x72-a.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Zoom on the jumper</p></td>
</tr>
</tbody>
491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546
</table>
<p>For the M electrode board, we suggest addressing it with address 0x73:</p>
<table class="docutils align-center">
<colgroup>
<col style="width: 12%" />
<col style="width: 88%" />
</colgroup>
<tbody>
<tr class="row-odd"><td rowspan="4"><p>4</p></td>
<td><img alt="../_images/N_0x73.jpg" src="../_images/N_0x73.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Mount the jumpers and note the value of the address and the
electrode name on the mux board (B).</p></td>
</tr>
<tr class="row-odd"><td><img alt="../_images/N_0x73-a.jpg" src="../_images/N_0x73-a.jpg" />
</td>
</tr>
<tr class="row-even"><td><p>Zoom on the jumper</p></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
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