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<div class="document" id="pyresistorcolorcode">
<h1 class="title">PyResistorColorCode</h1>
<!-- -*- Mode: rst -*- -->
<!-- -*- Mode: rst -*- -->
<!-- |PyResistorColorCodeUrl|
|PyResistorColorCodeHomePage|_
|PyResistorColorCodeDoc|_
|PyResistorColorCode@github|_
|PyResistorColorCode@readthedocs|_
|PyResistorColorCode@readthedocs-badge|
|PyResistorColorCode@pypi|_ -->
<!-- .. _PyResistorColorCode@github: https://github.com/FabriceSalvaire/PyResistorColorCode -->
<!-- .. _PyResistorColorCode@pypi: https://pypi.python.org/pypi/PyResistorColorCode -->
<!-- coverage test -->
<!-- https://img.shields.io/pypi/status/Django.svg -->
<!-- https://img.shields.io/github/stars/badges/shields.svg?style=social&label=Star -->
<!-- End -->
<!-- -*- Mode: rst -*- -->
<p><a class="reference external" href="https://pypi.python.org/pypi/PyResistorColorCode"><object data="https://img.shields.io/pypi/l/PyResistorColorCode.svg" type="image/svg+xml">PyResistorColorCode license</object></a>
<a class="reference external" href="https://pypi.python.org/pypi/PyResistorColorCode"><object data="https://img.shields.io/pypi/pyversions/PyResistorColorCode.svg" type="image/svg+xml">PyResistorColorCode python version</object></a></p>
<p><a class="reference external" href="https://pypi.python.org/pypi/PyResistorColorCode"><object data="https://img.shields.io/pypi/v/PyResistorColorCode.svg" type="image/svg+xml">PyResistorColorCode last version</object></a></p>
<div class="section" id="overview">
<h1>Overview</h1>
<!-- -*- Mode: rst -*- -->
<p>PyResistorColorCode is a Python module that provides some tools to manage <a class="reference external" href="http://webstore.iec.ch/webstore/webstore.nsf/artnum/033377!openDocument">IEC 60062</a> marking codes for
resistors.</p>
<!-- IEC 60062 is also for "and capacitors" -->
<p>The associated program <strong>resistor-decoder</strong> provides a graphical user interface to help user to
decode a resistor colour-coding using an inference algorithm. This feature is an enhancement
compared to a program like <strong>gresistor</strong> which is only a colour-coding calculator.</p>
<p>I started to develop this software a day where I had to sort a lot of unsorted resistors in a
jumble. Resistors colour-coding using no more than 3 bands (2 digits and a multiplier) are no too
difficult to decode when a person is experienced. But for more accurate resistors, it is more
tricky. Another difficulty arises when it is difficult to recognise the colour of a band, due to an
inappropriate colour contrast or tone. For strange colour-coding we can in last resort use an
Ohmmeter to measure the resistance value. But it doesn't respond to the question what is the
specification of this resistor: tolerance, temperature coefficient, etc. For all theses reasons, I
developed an inference algorithm coupled to an graphical user interface to help user to decode
resistor colour-coding.</p>
<!-- The user and API documentation is hosted `here <http://fabricesalvaire.github.io/PyResistorColorCode>`_. -->
<img alt="https://raw.github.com/FabriceSalvaire/PyResistorColorCode/master/doc/sphinx/source/_static/resistor-decoder.png" src="https://raw.github.com/FabriceSalvaire/PyResistorColorCode/master/doc/sphinx/source/_static/resistor-decoder.png" />
<div class="section" id="inference-algorithm">
<h2>Inference Algorithm</h2>
<!-- -*- Mode: rst -*- -->
<p>The inference algorithm works as follow:</p>
<ul class="simple">
<li>code orientation (left-right or right-left) doesn't matter,</li>
<li>unset bands are not take into account,</li>
<li>at least 3 colours must be provided: 2 digits and the multiplier,</li>
<li>colour band are interpreted by priority as:</li>
</ul>
<blockquote>
<ol class="arabic simple">
<li>resistance value,</li>
<li>resistance tolerance,</li>
<li>temperature coefficient,</li>
</ol>
</blockquote>
<ul class="simple">
<li>the resistance value must exists in a IEC 60063 series: E6, E12, E48, E96, E192,</li>
<li>the resistance tolerance must be defined if there is a colour band assigned to it.</li>
</ul>
<p>When there is more than one hypothesis for the given input, the hypotheses are sorted by ascending
precision (series).</p>
<!-- End -->
</div>
<div class="section" id="where-is-the-documentation">
<h2>Where is the Documentation ?</h2>
<p>The documentation is available on the <a class="reference external" href="https://fabricesalvaire.github.io/PyResistorColorCode">PyResistorColorCode Home Page</a>.</p>
</div>
<div class="section" id="how-to-install-it">
<h2>How to install it ?</h2>
<p>Look at the <a class="reference external" href="https://fabricesalvaire.github.io/PyResistorColorCode/installation.html">installation</a> section in the documentation.</p>
</div>
</div>
<div class="section" id="credits">
<h1>Credits</h1>
<p>Authors: <a class="reference external" href="http://fabrice-salvaire.fr">Fabrice Salvaire</a></p>
</div>
<div class="section" id="news">
<h1>News</h1>
<!-- -*- Mode: rst -*- -->
<!-- no title here -->
<div class="section" id="v1-2017-11-21">
<h2>V1 2017-11-21</h2>
<p>Ported to Python 3 and PyQt5</p>
</div>
<div class="section" id="v0-2012-05-20">
<h2>V0 2012-05-20</h2>
<p>Started project</p>
</div>
</div>
</div>
</body>
</html>