The free and/or open source electronic circuit simulation software on this page allow you to design, analyse and test a circuit virtually in a browser or on a computer. They simulate the behaviour of an electronic device/circuit, and are often used because it is cheaper, quicker and often more practical to simulate a circuit than to physically build one. The programs below may provide either analog or digital simulation capabilities or both, have a schematic editor, a waveform viewer, support resistors, capacitors, diodes, etc.
In the following, we explore a series of free online and computer software tools for circuit simulation.Online tools for circuit simulation.Here we are listing a couple of free online circuit simulators for you to try out.These circuit simulations are not needed to be downloaded in your computer, and they can work directly from the website.
In the following, we explore a series of free online and computer software tools for circuit simulation.Online tools for circuit simulation.Here we are listing a couple of free online circuit simulators for you to try out.These circuit simulations are not needed to be downloaded in your computer, and they can work directly from the website.
I also puschased PIC18F46J50 8 BIT-mcu, first time i am using PIC microcontroller so i want to know that how to download example program in PIC18F46J50 microcontroller.could anyone help, how to start this or i have to purchase another developing board.
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- 1 Computer softwares for circuit simulation
EasyEDA electrionic circuit design, circuit simulation and PCB design
EasyEDA is an amazing free online circuit simulator which is very suitable for everyone who loves electronic circuit. EasyEDA approximates some LTspice IV, but with a somewhat more friendly interface. This simulator is also very powerful , which can verify analog, digital, and mixed signal circuits with spice subcircuits and models and get results quickly from the cloud-based servers. The software environment allows you to design schematic, check operation by circuit simulator. When you make sure the circuit function is good, you can create printed circuit boardwith the same software. On the website you can find and use many projects and electronic circuits made by others because they are public and open hardware.It’s free and also allows you to share your work with others.
Circuit Sims
It was one of the first open source web based circuit simulation software, It’s an excellent tool for both students and electronic enthusiasts. Its design is based on colors that can indicate for example positive or negative voltage, and allows you to build simple circuits with mouse clicks. Regrettably, the developer failed to make the leap in quality and increase the graphical user interface.
DcAcLab
It has visual and attractive graphics, but limited circuit simulation software. It ‘s definitely a great program for teaching, very easy to use. it makes you see the components as they are made. It does not allow you to design the circuit, but only to make practise.Every Circuit
It is an electronic simulation software online with a well-made graphics. When you enter the online program and it will ask you to create a free account so that you can save your projects and have a limited portion of the area to draw your circuit. To use it without limitations demanding an annual fee of $ 10. It can be downloaded and used on platforms of Android and iTunes. The components have a limited ability to simulate with spice minimum parameters. Very easy to use, it has a great system of electronic design. It allows you to include (embed) simulation into your web page.
DoCircuits
It is an electronics circuit simulation software. Although it leaves people the first impression of confusion about the website, it provides many examples about how the program works, see yourself on video “get started in five minutes.” The measurements of the parameters of the electronic circuit are displayed with realistic virtual instruments.
PartSim
Electronic circuit simulation software PartSim is an electronic circuit simulator online. It’s good at spice simulation. You can draw electrical circuits and test it. It is still a new simulator so that there are few components to make simulations for choices.
123D Circuits
An activity program developed by AutoDesk, allowing you to create the circuit, see it onthe breadboard , use the platform Arduino, simulate the electronic circuit and eventually create the PCB. The components are displayed in 3D in their real form. You can program the Arduino directly from this software simulation,( it is) really impressive.
TinaCloud
This electronic circuit simulation program has sophisticated capabilities. It allows you to simulate, in addition to the normal mixed-signal circuits, microprocessors also, VHDL, SMPS power supplies and radio frequency circuits. The calculations for electronic simulation are performed directly on the companyserver and allow an excellent simulation speed.
Computer softwares for circuit simulation
A computer software offers different ways to manipulate and organize the electrical circuits including here the possibility to import files, share, and work with complex electronic scheme.In the following you have available a series of computer software tools to draw and simulate electronic circuits and diagrams.
Qucsis
a circuit simulation software with graphical user interface. The software aims to support all kinds of circuit simulation types, e.g. DC, AC, S-parameter, Transient, Noise and Harmonic Balance analysis. Pure digital simulations are also supported. Qucs works on almost any operating systems such as Solaris, Apple Macintosh, Microsoft windows, FreeBSD, NetBSD etc. The program is released under the GNU General Public License in source code form, so you will need to compile it yourself before you can run it.
LT Spice Simulator
Electronics circuits simulation software is available from a mainstream analog chip company, Linear Technology, works on Windows, OS X. Although it is biased towards using their parts, it is flexible and can be used with other vendor’s parts.LTspice is much fast simulation of switching regulators with enhanced SPICE (compared to normal SPICE simulators).LTspice gives access to over 200 op amp models, transistor models, MOSFET models etc. A high disadvantage of LTspice is its proprietary code base which is licensed by Linear Technology. Had they made it open source, LTspice could have gone places with collaborative development.
Ngspice
This electronics circuit simulation software is a mixed level, mixed signal circuit simulation engine, based on three open source software packages: Spice3f5, Cider1b1 and Xspice. Ngspice is part of gEDA project, a full GPL’d suite of Electronic Design Automation tools. It works on Linux andFreeBSD systems.
MultiSim National Instruments
Multisim electronics circuit simulation software is based on Berkeley SPICE and comes in both free and paid additions. MultiSim, the circuit maker software enables you to capture circuits, create layouts, analyse circuits and simulation. Highlight features include exploring breadboard in 3D before lab assignment submission, create printed circuit boards (PCB) etc. Breadboard simulation is possible with Multisim circuit simulator.It’s available in Microsoft Windows.
Proteus
Prospice is a mixed mode, Spice based electronics circuit simulation tool from LabCenter. They have two versions, basic and advanced. Basic version is free which supports interactive simulation only while advanced supports a range of useful functions and features like graph based analysis which includes frequency, noise, distortion, fourier parameters etc.The software runs on the Windows operating system.
CircuitLogix
this student version electronics simulation software from CircuitLogix enables you to perform analog, digital and mixed mode circuit analysis and simulation. This SPICE simulation software provides 4000 devices on its student version which is 1/3 of the pro version. This circuit building software give access to switches, linear IC and digital IC, FET, Transistors, relays, displays, signal generators, SCR’s, opto isolators, photo diodes, semiconductors, motors etc. It works on Windows system.
XSPICE
this is developed as an extension to Spice 3 by Georgia Institute of Technology. It has code modelling feature which enables user to add new models. Its code model library includes functional blocks like multipliers, summers, integrators, magnetics models, limiters, S-domain transfer functions, digital gates, etc. The program is provided in source code form, and is released into the public domain.
TINA supports a lot of (PIC, AVR, Arduino, 8051, HCS, STM, ARM, TI-Tiva, TI-Sitara, Infineon-XMC) microcontrollers; new MCUs are constantly being added. You can see, modify and debug the program running in the processor and, of course, you can create your own code.
There are two ways of providing the program for microcontrollers in TINA. You can use the binary code and debug file made by a standard compiler (e.g. MPLAB for PICs) or you can just load your assembly code to run and debug in TINA using its built in assembler-debugger.
Creating a simple counter circuit using a PIC microcontroller with assembly language programming
Creating a simple counter circuit using a PIC microcontroller with C language programming
Basic microcontroller debugging using TINA
In TINA microcontrollers can be simulated not only alone but also together with analog, digital, HDL or other models.
Running and editing MCU code
Load the PIC Flasher.TSC circuit from the ExamplesMicrocontrollersPic folder.
The following schematic using the 16F73 PIC microcontroller will appear with the 16F73 PIC microcontroller:
This circuit simply counts forward one-by-one. Press the button to see how it works.
The display should step forward one-by one.
Double-click the MCU to see the ASM code in it. (see more details in the Quick Start manual).
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TINA has a great feature whereby you can edit and change the source code directly in TINA.
Lets make the following change in the code:
Change the instruction (selected above) in line 25 (you can see the line number in the right bottom corner of the code editor window):
from addlw 01H
to addlw 02H
Save the changed code to TINA by pressing the icon and close the open MCU windows.
If you press the button now, the increment will be 2!
Note that the changed code will be automatically saved in the TINA .TSC file.
Using the debugger
Let’s see another application with more interactivity.
Load the PIC16F84interrupt_rb0.TSC example of TINA from the ExamplesMicrocontrollersPic folder.
Press the button. It seems at first that nothing is happening.
However, if you click on the SW-HL1 switch., the display will step forward by 1 each time the switch changes from Low to High.
The PIC’s interrupt handling capability will allow us to detect switch changes.
Now let’s see the operation in more detail using TINA’s interactive ASM debugger.
To activate the debugger, select Option on the Analysis menu. Then set the “Enable MCU Code debugger checkbox”, as shown below on the Analysis Options dialog box.
Press the OK button and the MCU debugger will appear:
Let’s follow the program execution step-by-step by pressing the Trace Into button.
After around 14 clicks we get to the PT1: label where the program seems to be in an infinite loop.
PT1: INCF TEMP, F GOTO PT1
Now click on the SW-HL1 switch and change it to High. (You should click when the cursor changes into an upward pointing arrow Î). Go back to the Debugger and click the Trace Into button twice. The program will recognize the interrupt and jump into theincrement the COUNTER and copy to PORT A, and the output will be 1. After this the program will return to the “infinite loop” at PT1.
Editing the code in the debugger
Now let’s make a small change in the program to demonstrate the use of the debugger. Duplicate the INCF COUNTER, F statement using Copy and Paste like this:
Now when you press the the program will ask:
Press Yes and press the button again. Now the increment will be 2 at each Low-High change of the switch.
You can also check the circuit in the continuous Running mode of the debugger by pressing the button.
Even though the debugger will run fast, you can still see the “infinite cycle’ and then the jump to the Interrupt server part ( INT_SERV: ) when you change the switch.
Making a breakpoint
Using the step-by-step mode, it is often impossible to get to a particular point in the program. Even if you are patient enough to step a thousand steps, the program’s flow might not allow you to step where you want.
To stop at particular line, you can mark the target statement by setting a “breakpoint”.
Run the program in the continuous mode of the debugger using the Run command and now the program will stop at the desired line before executing the marked command.
To demonstrate this, click on the increment statement in our interrupt server after the INT_SERV: label and press the Toggle break button.
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Now press the Run button. The program starts to run in an “infinite cycle”.
Even though you have set a breakpoint, code execution will not stop because it never gets to the breakpoint. However, when you change the switch from Low to High the program will stop at the marked statement:
Now you can continue either step by step or in the Run mode