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 +Free Software  {{ :qelectrotech-fin-1_1.jpg?100|}}
  
 +presentation qelectrotech
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 +Sofiane Ait Chabane & Robert Saint-Fort
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 +Summary
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 + Under EU Free Software , we discover a multitude of free software in the field of electrical engineering but also more general science. Work under Linux
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 +made the experience much more interesting .
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 + In our turn , we will be presenting qelectrotech , a simple tool for mapping electrical circuits. The result is a remarkable graphic quality that makes possible the operation , including educational purposes.
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 +Abstract
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 +Within the unit of Free Softwares , We Have Discovered many free tools and softwares related to electrical engineering goal aussi more general scientific domains . Working on a Linux environment made ​​the experience even more interesting. In turn , we will present qelectrotech , a single mapping software for electrical circuits. The results show a remarkable That makes the graphic quality can use in educational purposes.
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 +   "Teaching a non-free program returns to teach dependence , which is contrary to the mission of the school " - Richard Stallman
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 +introduction
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 +It was in 1984 that the free software movement was born , headed by researcher Richard Stallman followed by a handful of programmers. Opposed to the restrictive policy source code , they are expressed
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 +for a free user access to programs.
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 +Free software gives users the freedom to run , copy, distribute, study, change and improve the software .
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 +Qelectrotech is a program under GNU / GP is free and open . It is specially designed to make the electrical mapping oriented electrical and power electronics , no simulation or calculations. Its simplicity and practicality make it a must for any electrician software.
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 +A. Interface Overview
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 + {{ :qelectrotech-fin-3_13.jpg|}}
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 +TEQ interface is simple and easy to use . At the top is the menu bar . It provides access to many functions : creating project files , editing, etc. preferences .
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 +The work area is to the right , this is where they deposit items, and link them to form the pattern.
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 +The left side gives access to two components: the first is the " panel elements ", which includes the current project , the associated diagrams, all projects of the user, mainly collections of components. The first is the common collection provided by default , the second is that of combining its components created by user himself
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 +same or imported from outside .
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 +The second 'Cancellation' pane displays a list of all the shares of companies changes and cancellations in the diagram.
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 +At the bottom of the work area are editable elements of cartridge.
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 +Note that in the current version , support is not available , however explanations are available on the website of the software.
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 +B. features
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 +We will explore the features of TEQ through a small example schema : Industrial Process . 1 . Creating a project
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 +{{:qelectrotech-fin-4_14.png?100|}}
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 +Press this icon to create a new project. Note that TEQ can handle multiple projects simultaneously , and each project can contain multiple schemas .
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 +  {{:qelectrotech-fin-4_15.png?200|}}
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 +By clicking on Project in the menu bar we can add a diagram to remove , to clean .
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 +It is necessary to change the project properties to properly define and to work as desired. We will go back the project name , size patterns , the type of driver to use (single or multi-wire ) , date etc. . Projects are saved in a file . Qet incorporating all the parameters of the project,
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 +diagrams with all components .
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 +  {{ :qelectrotech-fin-5_16.jpg |}}
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 +2 . Make a diagram
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 + a. Submit a component and annotate  {{ :qelectrotech-fin-5_17.png |}}
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 +Make a diagram TEQ is so quick and easy : just locate the component to be used in the panel and then click on elements by drag / drop in the work area .
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 +After moving the desired component
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 +You can annotate by double clicking
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 +on empty fields provided for this purpose .
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 +The components can be rotated , deleted, copied , or by clicking
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 +above with the right mouse button or by using shortcuts
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 +.
 +{{:qelectrotech-fin-5_18.png?200 |}}  {{ :qelectrotech-fin-5_19.png?200 |}}
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 +Text can be inserted by clicking the icon at the top right
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 +                                                                                          
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 +b . Wiring components
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 +To connect a component to another , simply position the mouse over the component terminal and "pull
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 +"Until the arrival terminal .
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 +If you want to connect a third component after the second , simply not click on the link already drawn but on the terminal of the first element as shown below if . The connection point will automatically .
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 +  {{ :qelectrotech-fin-6_20.jpg |}}      
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 +In case of son would overlap , as shown below , it is sufficient to click a son concerned, it becomes red and can then be shifted so as to be distinguished from the other thread .
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 +    {{:qelectrotech-fin-6_22.png|}} {{ :qelectrotech-fin-6_21.png|}}     
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 +3 . Printing diagrams and export
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 + Once the plan is finalized, we can TEQ is : - D
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 +e launch direct printing or save as PDF or
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 +Postscript via
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 +print icon  {{ :qelectrotech-fin-6_23.png|}}
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 +{{ :qelectrotech-fin-7_24.png |}}
 +To export the drawings to an image file (JPEG , PNG , Bitmap and SVG ) via
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 +" File " in the menu bar .
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 + {{ :qelectrotech-fin-7_25.png |}}
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 +The image size can be changed, security settings , format, options also made .
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 +4 . Edit an item
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 +Here is one of the strengths of this software and free software in general
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 +: The freedom to adapt
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 +software according to these needs. Among these requirements , the user can for example edit a component provided by default. Note that this is only possible for the system administrator , other users can not modify shared content between different sessions . Edit component is as follows : Click the right mouse button on the target component in the
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 +Panel elements . Select "Edit element".
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 +We took the example of a simple circuit breaker that we want to edit. It can be selected either in the collection of components , or if the pattern is already .
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 +  {{ :qelectrotech-fin-8_26.jpg |}}
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 +Several geometric shapes can be added from the toolbox basic element " terminal " must be used by all components against . Care must be taken to adapt the framework to the size of the component {{ :qelectrotech-fin-8_27.jpg|}}
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 +avoid
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 +some display problems due to a disproportionate scale. The button display in configuration displays all the parameters characterizing a piece of the scheme: The color, position, orientation , etc. and modify them if necessary . This version of TEQ adds , adjust elements freely pixel by pressing the Ctrl key during the operation.
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 + 5. Creating a new element
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 +TEQ provides the ability to create yourself a new item. To do this, simply
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 +click on the icon
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 +A window appears, in laqelle must be specified category where the element is created , its
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 +name ( including language ), the dimensions of the new element and the point of entry of the element with the mouse , and finally the possible orientations. The design of the new component is exactly the same as for editing.
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 +The official website of qelectrotech provides a space for exchanging elements for
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 +user community.
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 +C. Conclusion
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 + We discovered a more free software in the field of Electrical Engineering . Qelectrotech is a young but very promising free software as evidenced by the notoriety he already bénificie within academic and professional electrical engineering. The number of developers increases dramatically , and major improvements are planned , both in terms of functionality in terms of graphics .
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 +references
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 +http://fr.wikipedia.org/wiki/QET_ ( qelectrotech ) http://fr.wikipedia.org/wiki/Logiciel_libre http://qelectrotech.org/
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 +nomenclature
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 +Qelectrotech 0.22 Original Idea : Benedict Ansieau Programming: Xavier Guerrin Translated into English, Spanish, Russian , Portuguese and Czech. GNU / race license
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