• Electronic circuit emulator. Review of the best programs for drawing electrical circuits

    There aren't that many open-source CAD programs out there at the moment. However, among electronic CAD (EDA) there are some very worthy products. This post will be dedicated to the modeler electronic circuits with open source code. Qucs is written in C++ using the Qt4 framework. Qucs is cross-platform and released for Linux, Windows and MacOS.

    The development of this CAD system began in 2004 by the Germans Michael Margraf and Stefan Jahn (currently not active). Qucs is currently being developed by an international team, which includes me. The project leaders are Frans Schreuder and Guilherme Torri. Below the cut we will talk about key capabilities our circuit simulator, its advantages and disadvantages compared to analogues.

    The main window of the program is shown in the screenshot. There a resonant amplifier is modeled on field effect transistor and oscillograms of the voltage at the input and output and also the frequency response were obtained.

    As you can see, the interface is intuitive. The central part of the window is occupied by the actual simulated circuit. Components are placed on the diagram by dragging and dropping from the left side of the window. Modeling views and equations are also special components. The principles of editing circuits are described in more detail in the program documentation.

    The Qucs schema file format is XML based and comes with documentation. Therefore Qucs schema can be easily generated third party programs. This allows you to create circuit synthesis software that is an extension of Qucs. Proprietary software typically uses binary formats.

    Let's list the main components available in Qucs:

    1. Passive RCL components
    2. Diodes
    3. Bipolar transistors
    4. Field effect transistors (JFET, MOSFET, MESFET and microwave transistors)
    5. Ideal op amps
    6. Coaxial and microstrip lines
    7. Library components: transistors, diodes and microcircuits
    8. File components: subcircuits, spice subcircuits, Verilog components

    The component library uses own format, based on XML. But you can import existing component libraries based on Spice (listed in datasheets for electronic components).

    The following types of simulation are supported:

    1. DC Operating Point Simulation
    2. Frequency Domain Modeling on AC
    3. Modeling transition process in the time domain
    4. S-parameter modeling
    5. Parametric analysis

    Simulation results can be exported to Octave/Matlab and data post-processing can be performed there.

    Qucs is based on a newly developed circuit simulation engine. A distinctive feature of this engine is the built-in ability to simulate S-parameters and SWR, which is important for analyzing RF circuits. Qucs can convert S-parameters into Y- and Z-parameters.

    The screenshots show an example of S-parameter modeling broadband amplifier high frequency.

    So, distinctive feature Qucs is the ability to analyze complex frequency characteristics(CCH), construction of graphs on the complex plane and Smith diagrams, analysis of complex resistances and S-parameters. These capabilities are not available in the proprietary MicroCAP and MultiSim systems, and here Qucs even outperforms commercial software and achieves results unattainable by Spice-based circuit simulators.

    The disadvantage of Qucs is the small number of library components. But this drawback is not an obstacle to use, since Qucs is compatible with the Spice format in which the models are presented electronic components in datasheets. The modeler is also slower than similar Spice-compatible modelers (such as MicroCAP (proprietary) or Ngspice (open-source)).

    We are currently working on the ability to provide the user with a choice of engine for circuit simulation. It will be possible to use the built-in Qucs engine, Ngspice (a Spice-compatible console modeler similar to PSpice) or Xyce (a modeler that supports parallel computing via OpenMPI)

    Now let’s look at the list of innovations in the recent release of Qucs 0.0.18 promising areas in Qucs development:

    1. Improved Verilog compatibility
    2. Porting of the interface to Qt4 continues
    3. Implemented a list of recent open documents in the main menu.
    4. Implemented export of graphs and diagrams to raster and vector formats: PNG, JPEG, PDF, EPS, SVG, PDF+LaTeX. This function is useful when preparing articles and reports containing simulation results
    5. Ability to open a schematic document from a future version of the program.
    6. Fixed bugs related to the modeler freezing under certain conditions.
    7. A system for synthesizing active filters for Qucs is being developed (expected in version 0.0.19)
    8. Development of interface with other open-source engines for modeling electronic circuits is underway (

    10 Best Free Online Circuit Simulators

    List of demons paid programs electronic circuit simulation online is very useful for you. These circuit simulators that I offer do not need to be downloaded on a computer and can be run directly from the website.

    1. EasyEDA electronic circuit design, circuit simulation and PCB design:
    EasyEDA is an amazing free online circuit simulator which is very suitable for those who love electronic circuit. The EasyEDA team has been committed to making a sophisticated design program on a web platform for several years now, and now the tool is becoming wonderful for the users. Software environment allows you to design the circuit yourself. Check the operation through the circuit simulator. When you make sure the circuit function is good, you will create the PCB with the same software. There are over 70,000+ diagrams available in their web databases along with 15,000+ Pspice library programs. On the site you can find and use many designs and electronic circuits made by others because they are public and open source hardware. It has some pretty impressive import (and export) options. For example, you can import files into Eagle, Kikad, LTspice and Altium designer, and export files as .PNG or .SVG. There are many examples on the site and useful programs training that allows people to easily manage.

    2. Circuit Sims: This was one of the first web based circuit emulators with open source I tested it a few years ago. The developer failed to improve quality and increase GUI user.

    3. DcAcLab has visual and attractive plots, but is limited to circuit simulation. This is certain great program for learning, very easy to use. This makes you see the components as they are made. This will not allow you to design the circuit, but will only allow you to practice.

    4. EveryCircuit is an online electronics emulator with well-made graphics. When you enter online program, and it will ask you to create a free account so you can save your designs and have a limited area to draw your diagram. To use it without restrictions, it requires an annual fee of $10. It can be downloaded and used on Android platforms and iTunes. Components have limited ability to simulate with small minimum parameters. Very easy to use, it has a great system electronic design. It allows you to include (embed) simulations in your web pages.

    5. DoCircuits: Although it leaves people with a first impression of confusion about the site, but it gives many examples of how the program works, you can see yourself in the video "will start in five minutes." Measurements of electronic circuit parameters will be demonstrated with realistic virtual instruments.

    6.PartSim electronic simulator schemes online. He was capable of modeling. You can draw electrical circuits and test them. It's still a new simulator, so there are several components to make the simulation to choose from.

    7. 123D Circuits An active program developed by AutoDesk, it allows you to create a circuit, you can see it on breadboard, use the Arduino platform, simulate the electronic circuit and finally create the PCB. The components will be demonstrated in 3D in their actual form. You can program Arduino directly from this simulation program, (it) is really impressive.

    8. TinaCloud This modeling program has advanced features. It allows you to simulate, in addition to conventional mixed-signal circuits and microprocessors, VHDL, SMPS electrical supply and radio frequency circuits. Calculations for electronic modeling are performed directly on the company’s server and allow excellent modeling speed

    Today, not a single experienced electrician uses manual drawing of electrical circuits on a piece of paper. It is much simpler, more convenient and clearer to draw up a project for the electrical wiring of a room on a computer using a special software package in Russian. However, the problem is that not all programs are easy to use, so when you stumble upon an inconvenient and, moreover, paid version software, most old-school masters simply discard modern way modeling aside. Next, we will provide readers of the site with an overview of the most simple programs for drawing electrical diagrams apartments and houses on the computer.

    Free software

    There are not many Russian-language, easy-to-use and, moreover, free software for drawing up single-line electrical diagrams on a computer. So we created small rating, so that you know which programs are best for drawing power supply diagrams for houses and apartments:

    1. . Oddly enough, the most popular and, no less important, free program for drawing single-line electrical diagrams on a computer is vector graphic editor Visio. With its help, even a novice electrician can quickly draw a circuit diagram of a house or apartment. Regarding functionality, they are not as advanced as those of the software that we will provide below. To summarize, we can say that Microsoft Visio is easy to use and at the same time in Russian free program for modeling electrical circuits, which is suitable for home electricians.
    2. . A more professional software package for designing indoor electrical circuits. In Compass there is own base data, which stores the names and ratings of all the most popular types of automation, relay protection, low-voltage installations and other circuit elements. In addition, the database contains graphic symbols of all these elements, which will make it possible to create a clear diagram of the power supply or even a separate distribution board. The software is completely in Russian and you can download it for free.
    3. Eagle(Easily Applicable Graphical Layout Editor). This software package will allow you not only to draw single-line power supply diagrams, but also to independently develop a drawing of a printed circuit board. As for the latter, drawing can be done either manually or without one’s own participation (in automatic mode). Today there are both paid and free versions of the Eagle program. For home use It will be enough to download the version labeled “Freeware” (there are some restrictions in relation to maximum size useful area of ​​the printed circuit board). The disadvantage of this software package is that it is not officially Russified, although if you try a little, you can find a Russifier on the Internet, which will allow you to draw electrical diagrams of apartments and houses without any obstacles.
    4. Dip Trace. One more popular program for drawing electrical circuits and creating routes for printed circuit boards. The program is simple and easy to use, and is also entirely in Russian. The interface allows you to design a printed circuit board in three-dimensional form, using a database with ready-made elements electrical circuit. Rate full functionality You can only use the software for money, but there is also a stripped-down free version, which will be quite enough for a novice electrician.
    5. " A completely free program for drawing electrical circuits on a computer. From the official website you can download it in Russian and full version. In addition to modeling power supply projects for apartments, houses and other types of premises, in this software package you can easily create a diagram in which the most suitable ratings of circuit breakers, relay protection, etc. will immediately be provided. A nice addition to this software is a database with stickers that can be printed and pasted in your own distribution panel to graphically designate all circuit elements according to GOST.
    6. . One of free versions The popular AutoCAD editor is AutoCAD Electrician. Briefly about this software, we can say the following: the functionality is suitable for both beginners and professional electricians working in the energy field. Everything in the interface is simple, you can figure it out quickly. All functions are in Russian, so you can easily use AutoCAD to draw electrical wiring diagrams for your house or apartment.
    7. Elf. Interesting name a simple program for modeling power supply circuits in construction drawing. The software package itself is no less interesting and multifunctional. Using the Elf Design program, you can create power supply drawings of any complexity. In addition, the software helps with the appropriate denomination, etc. "Elf Design" is a completely free software package in Russian.

    You can see some of the listed programs in video reviews:

    AutoCAD Electrical

    KOMPAS-Electric

    In addition to the 7 programs provided for drawing electrical circuits, there are more than a dozen editors in which you can draw up a basic plan for the power supply of a house or apartment for free, but other programs have a more complex interface or problems with the Russian version. We recommend giving preference to representatives this rating, so as not to waste time in the future searching for localization codes, user manuals, and the like!

    Paid software

    We reviewed free programs for creating electrical circuits on our own. However, you yourself understand that in paid versions a wider range of features and convenient add-ons are provided that will allow you to draw an electrical circuit on a computer. There are many popular paid programs for drawing electrical circuits. We have provided some of them above, but there is one more program that is worth talking about a little - sPlan. This is one of the easiest to use and also multifunctional software packages for drawing up electrical wiring diagrams and tracing electronic boards. The interface is convenient, in Russian. The database contains all the most popular graphic elements for drawing electrical circuits.

    Proteus Professional is a circuit modeling system based on models of electronic components adopted in PSpice. A distinctive feature of the Proteus Professional package is the ability to simulate the operation of programmable devices: microcontrollers, microprocessors, DSPs, etc. Additionally, the Proteus Professional package includes a PCB design system. Proteus Professional can simulate the operation of the following microcontrollers: 8051, ARM7, AVR, Motorola, PIC, Basic Stamp.

    Electronic Lab v2.2 (Three Phase Chains) Program for calculating three-phase electrical circuits

    Electronic Lab (Three phase chains) - A program for calculating three-phase electrical circuits using the symbolic method, has a convenient, intuitive interface. Calculates a three-phase electrical circuit, both with normal and emergency operating modes: when connecting the load with a star - short circuit phases (short circuit), line wire break; when connecting the load with a triangle, there is a break in the load phase, a break in the line wire. Electronic Lab (Three phase chains) -

    CadSoft Eagle 5.6.0

    Cadsoft EAGLE is an excellent all-in-one tool for the full cycle of PCB development, starting with the creation of a circuit diagram and ending with the creation of a printed circuit board and its routing. The Pro version of the program allows you to develop printed circuit boards up to 1600x1600 mm in size (16 layers) with a resolution of up to 1/10000 mm. To do this, the program implements three modules: Schematic Module, Layout Editor, Autorouter. In addition, the program has a fairly large library, which contains large number standard and fairly common components, for example microcontrollers, that is, now there is no need to draw an image of the desired component on the circuit diagram and create a footprint for the printed circuit board.

    D-Navigator v 0.0.106 program for selecting accessories for cell phone.

    With this program you can find out the accessories that suit your phone, as well as see new products. The program updates the database automatically (Online) via the Internet, you will always be up to date latest news! The program has a convenient Russian menu with icons, flexible settings menu, detection system. Download - D-Navigator v 0.0.106 program for selecting accessories for a cell phone. D-Navigator v 0.0.106 program for selecting accessories for a cell phone. An example of selecting compatible accessories for Nokia 6230i.

    Electronics Workbench Multisim is one of the world's most popular electronic circuit design programs, characterized by a combination of professional capabilities and simplicity, extensibility of functions from a simple desktop system to a network corporate system. This explains the widespread use of this wonderful program both for educational purposes and for industrial production of complex electronic devices. The archive contains the Professionals version, Russian models of op-amps, transistors, microcircuits.

    Electronics Workbench Multisim v8.2.12.SP1 free download.

    Features of Electronics Workbench Multisim v8.2.12 Electronics Workbench Multisim v8.2.12.SP1 - electronic laboratory on your computer at your fingertips! Electronics Workbench Multisim v8.2.12 circuit modeling system is designed for modeling and analysis of electrical circuits. Electronics Workbench allows you to simulate highly complex analog, digital, and digital-to-analog circuits. The libraries available in the program include a large set of widely used electronic components.

    Electronic reference book bipolar transistors Transistors v 1.2

    Electronic reference book on bipolar transistors with Russian letter indices (2089 pcs.) and their foreign analogues. Pin layout drawings; sorting by different parameters; saving in a file and printing the parameters of the selected device; the ability to edit and add new transistors to the directory. Every time you start the program, it creates backup database file, which will be used if the main database file is lost or damaged. Compression (defragmentation) of a database file, the size of which may unjustifiably grow after work related to writing/deleting data.

    Cadsoft EAGLE 4.11 is a program for the development of printed circuit boards and circuits.

    Cadsoft EAGLE is a comprehensive tool for PCB design, from creating a circuit diagram to creating a printed circuit board and routing it. The Pro version allows you to develop printed circuit boards up to 1600x1600 mm in size (16 layers) with a resolution of up to 1/10000 mm. To do this, the program implements three modules: Schematic Module, Layout Editor, Autorouter. In addition, the EAGLE program has a fairly large library containing many standard and fairly common electronic components, such as microcontrollers, so you will not need to draw an image of the component on the circuit yourself and create a footprint for the printed circuit board.

    Libraries for Splan and Sprint-Layot

    Download >>>>> Library for Splan_5.0 Download >>>>> Library for Splan_4.0 and Splan_4.0_plus Download >>>>> Library for Splan_3.0 Download >>>>> Library for Sprint-Layot

    sPlan 6.0.0.2 Full (rus) - drawing diagrams. Tool for drawing electronic and electrical circuits.

    Updated simple and handy tool for drawing electronic and electrical circuits sPlan 6.0.02. The program makes it easy to transfer symbols from a library of elements to a diagram and link them to a coordinate grid. sPlan has many drawing and editing tools that make diagram development convenient and efficient, such as auto-numbering of elements, compiling lists of elements, and others. sPlan contains so many convenient and varied functions that their use is limited only by your desires and needs, you can create a wide variety of drawings and diagrams!

    Navigate discs at the speed of thought. Explorer Lista

    Sometimes you can look at ordinary and familiar things from a different angle and get completely unexpected results. program Windows Explorer It's already been two decades. It would seem that there could be something new in it? It turns out that in a couple of minutes you can make Explorer much more convenient and faster. The object of our attention today will be the Explorer Lista program, developed for Windows XP/2000/2003. You can download it here. After installation and launch, a navigation bar appears in Explorer.

    Electronic circuit simulator in Russian is an ordinary SPICE simulator called TINA-TI with an easy to understand graphical shell. This program It works without any limit on the number of devices used and easily handles all-round work. Perfectly matches the imitation of the behavioral response of a variety of analog circuits, as well as switching power supplies. Using TINA-TI, you can easily design a circuit of any degree of complexity, connect previously created fragments, examine and recognize the quality indicators of the circuit.

    All presented elements available electronic circuit simulator in Russian TINA-TI, are dispersed into six types: passive components, switching switches, semiconductor devices, measuring devices, miniature models of devices of increased complexity. Additionally, this software includes many representative samples.

    Electronic circuit simulator compiled in Russian, so with its help you can easily master drawing and adjustment circuit diagrams. The process of creating a circuit in itself is not complicated, and after this operation is completed, the simulation stage begins. The program can perform the following types of research: assessment of permanent and AC. IN this analysis includes - calculation of key stresses, plotting the final result, determining intermediate parameters and testing temperature.

    Next comes the study of intermediate processes and noise distortions. Conditionality from the category of research, curriculum generates the final result in the form graphic images or tables. Before starting the simulation, TINA-TI checks the circuit for errors or errors. When any deviations are detected, all the defects will be shown in a separate window in the form of a list. If you click on an inscription with an error not recognized by the simulator, the part or part of the drawing will be indicated by markers.

    Additionally, TINA-TI can measure various signals and their test. To implement this type there are studies for this virtual devices: digital multimeter, oscilloscope, signal tester, source periodic signals and a recording device. All simulation devices available in the program correspond as closely as possible to the use of actual measuring devices. They can be virtually connected in any part of the circuit under study. All information data received by conventional devices is stored in the computer memory.

    Tina-TI is designed to function in an environment operating systems Windows 7, Vista, meanwhile the program effectively copes with work in Linux OS if used virtual machine Wine. The determining condition must be consistency of the OS language with the program being installed.

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