The biggest advantage of electronics simulators is that they allow you to validate on the PC what you will later assemble on the workbench. With a previous virtual simulation We understand the circuit's behavior, measure signals, detect faults, and save parts, time, and hassle before soldering anything.
Plus, today there's software for all profiles: from students to engineers, free and paid, installable on Windows 11 or directly in the browser. Choosing the right program It depends on your budget, your experience, the type of project (analog, digital, microcontrollers, PCB) and the depth of simulation you need.
What you can simulate and what components to work with
Modern environments include huge libraries of devices and blocks to design virtually any scheme. From basic circuitry (resistors, capacitors, inductors, sources, probes) to AND, OR, XOR, XNOR logic gates, flip-flops, timers, ALU units and mixed chips with their electrical rules.
If your project requires precision or complexity, you can also leverage advanced features and specific models for microwave, noise, frequency analysis, and VHDL for digital. The important thing is that the software is up to date and provide exactly the components and simulation models you will use.
Free programs for designing and simulating in Windows 11
Just because it's free doesn't mean it's limited: there are very mature tools that cover everything from schematics to professional PCBs. These options work on Windows 11 and, for the most part, also on Linux and macOS.
Kicad It's a cross-platform classic with a project manager, schematic editor, footprint selector, PCB editor, Gerber viewer, and bitmap symbol/footprint generator. It includes a PCB calculator and a 3D viewer to navigate through your board. It brings hundreds of symbols ready to use and you can create your own to customize libraries and processes.
If your thing is installation and automation documentation, ProfiCAD It allows you to draw electrical, control, hydraulic, or pneumatic diagrams with a very simple interface. The non-commercial edition has limitations (e.g., without bills of materials or netlists), but for learning and personal projects it is more than valid.
Free PCB It's a simple PCB editor with support for up to 16 layers and designs up to 152 cm², plus import/export of PADS-PCB, Gerber, and Excellon. Note: it doesn't have autorouter and it hasn't been updated since 2010, so if it suits you, great; if not, you might want to look for an active alternative.
For electrical schematics in Windows with a free software spirit, TinyCAD It offers symbol libraries, an online symbol search, and netlist export to tools like FreePCB. Perfect for drawing and annotating without complications.
whats up It excels in analog simulation (including microwaves) with a Qt interface and digital simulation capabilities using VHDL. It allows you to study signal, noise and results in various formatsIt hasn't received updates since 2017, but its open source code makes it possible to reactivate it.
Among the most popular for teaching and rapid analysis, ltspice SPICE stands out for its speed and robustness. It includes a waveform viewer, a large library of regulators and components, and advanced simulation of switching power suppliesYou'll find guides and instructional videos to help you master it without suffering.
If you want a modern ecosystem, FreePCB It's free software for schematics and PCBs with an intuitive interface, version control, and import/export automation. The project is on GitHub and is aimed at both beginners and professionals, so grows with you without forcing you to migrate.
Electric VLSI Design System (Java) is designed for design and testing from schematics to microchips, applying design rules and electrical validations during simulation. Very broad coverage of devices and technologies for demanding projects.
For profiles with experience in PCB, PCB (PCB tool) provides design rule checking, netlists, autorouter, and trace optimizer. Supports scripts and API to expand functions, ideal if you like to automate.
And if you need a virtual oscilloscope on Windows, Visual Analyzer It acts as a spectrum analyzer, includes an FFT viewer and utilities to measure frequencies, adjust filters or review signal parameters. Affordable interface with enough depth for those with a basic knowledge of electronics.
Finally, although it is a paid product, Eagle It has a trial version so you can test its workflow. It features an intuitive interface and offers editions with clear limits: the Standard (99 schematic sheets, 4 signal layers, and a 160 cm PCB area) and the Premium (999 sheets, 16 layers, and unlimited area). It has electrical screed tools, annotation of changes between schematic and PCB and design hierarchy.
Paid programs with professional features
It's not always necessary to upgrade to premium solutions, but when the project requires it, these suites offer a boost in libraries, automation, standards, and support. Windows 11 is fully supported on all major platforms in the sector.
National Instruments Multisim (formerly Electronics Workbench) integrates reference SPICE simulation with an interactive schematic environment for real-time analysis. It helps reduce prototyping iterations and PCB costs by Incorporate powerful analytics into the flow. Prices: €685 per year for students, €1926 for the base version, €3368 for the full version, and €4985 for the professional version.
Fritzing It focuses on community and accessibility as creative materials and offers courses and professional PCB manufacturing. It charges €8 for the download to fund its development and is supported by Windows 7 or higher, macOS 10.15+ and recent Linux (glibc ≥ 2.6).
eCADSTAR focuses on simultaneous 2D and 3D design, manual or automatic routing, and collaboration through a global support network. If you have a license, you get 24/7 support with local experts and access to over 20 million parts online from renowned manufacturers.
AutoCAD Electrical 2025 It adds more than 65.000 electrical symbols to the AutoCAD database and automates performance reports to validate the design. It has a steep learning curve and is subscription-based. €2.342 per year per user or €291 per month, with a 30-day trial.
SOLIDWORKS Electrical 2020 It stands out in collaboration and speed on complex designs, with an excellent interface; however, requires powerful equipment and its integration with other programs can be complex. Price on request; for students, €99 + VAT with trial option.
altium It is a reference for large engineering and academic teams: schematics, routing, documentation, simulation, flexible/rigid-flex 3D design, DFM compatibility, and easy migration from other platforms. Very complete and with a demanding curve. Price starts at €295 per month, trial available.
As a comprehensive suite, Proteus Combines schematic and simulation (ISIS) with routing (ARES), plus modules such as VSM for integrated design, measurement, and debug flows. It offers up to 16 copper layers, 14 million components and interactive manual routing. Purchase on their website and enjoy a free basic trial.
Closing the circle, OrCAD It offers a schematic editor, simulation and libraries with thousands of parts, customizable flows, and a focus on productivity. You can try it for free from its website and is one of the most widespread options in professional environments.
Simulators and online services to design without installing
If you prefer the browser or need to collaborate quickly, there are very capable platforms with SPICE backends and rich libraries. They are perfect for validating ideas from any computer, even a tablet.
EasyEDA It allows you to draw schematics, simulate, and design PCBs with a web version and app for Windows, Linux, and macOS. The free edition includes all editor features, unlimited personal projects and libraries, and collaboration, plus importing designs from popular tools like Eagle.
EveryCircuit It works on iOS, Android, and the web to build circuits like on a breadboard, share them, and embed them on websites and networks. Offers paid resources (about €13) to unlock all content.
Schematics (web editor) brings together hundreds of community elements and projects that you can open and run. Registration is required to edit, but It is excellent for learning based on real designs.
The simulator of Falstad It is educational and visual: you adjust simulation speed, control frequency and voltage, and draw your own circuits with analog, logic, and chip components. Ideal for exploring phenomenology such as LRC loads or transient responses.
Circuits Cloud, based on NGSPICE, offers a simple editor with sufficient analog and digital components for educational projects. It requires registration and is lightweight. but effective for learning SPICE running and saving your montages.
As a complement, a Virtual oscilloscope accessible in the browser, it allows you to observe the temporal evolution of signals (X time axis, Y voltage axis) without purchasing expensive instruments. Perfect for spot measurements when you are out of the lab.
Simulator.io It is very useful if you want something fast for logic and sequential gates, with accessible editor and simulator and collaboration features to co-design or share visualizations with others.
From the perspective of large databases, Schematics.com offers schematic drawing with hundreds of symbols and access to other users' designs, while PartSim.com It stands out for its enormous catalogue (generic, industrial, optoelectronics, semiconductors) for create from basic to advanced circuits. And if you need to start projects and share them, PartQuest provides a community tier with a free plan to get started.
Arduino Simulators: From the Classroom to Prototyping
If your focus is Arduino and microcontrollers, there are specific tools for testing hardware and software without having the board in front of you or before purchasing it. These options cover PC and browser and many allow you to debug and visualize signals, such as online Arduino simulator.
Arduino Cloud It allows you to work online with an in-browser editor, cloud-based IoT project manager, a GNU/Linux app, and access to the add-on store. Everything centralized to experience without complex installations.
Arduino Debugger (Paul Ware's Arduino Simulator) is open, simple, and has local libraries of sensors and actuators. It relies on a clear interface for manipulate inputs/outputs and review code quickly.
Arduino I/O Simulator Xevro is designed to simulate inputs and outputs by connecting your UNO via USB, with the option of adjusting lines of code on the fly. Ideal for validating logic seamless control.
circuit lab is an online tool for drawing and simulating circuits with documentation, tutorials, and a community-style Q&A system. It makes it easier to understand what is happening within each Arduino sketch.
If you are looking for a professional editor with a limited free version, Autodesk Eagle It offers 2 schematic sheets, 2 signal layers, and 80 cm² of board area in its hobbyist edition. It maintains real time synchronization between schematic and PCB, and modular design blocks.
In the web, EasyEDA It also works for Arduino, with a full-featured free editor, unlimited projects, import from other platforms, and collaboration. One of the most comfortable ways to go from schematic to PCB.
Emulate It allows you to run multiple projects in parallel, is free, and runs on Windows and GNU/Linux. It focuses on ATMega microcontrollers and AVR memory elements, as well as pushbuttons, timers, and LEDs. Very educational for multitasking.
Fritzing proposes to document Arduino-based prototypes and order the manufacturing of your PCB to Fritzing Lab. The simulator costs €8 to support the initiative, but the community and the maker approach more than make up for it.
Again, LTSpice It comes into play when you need to simulate with SPICE III the electrical environment (regulators, power networks, transient response) around your Arduino boards. Your wave viewer and editor They save you surprises when powering sensors and modules.
PartQuest It offers a free plan to get started, support for many features, and a community ready to help. If the project grows, you can upgrade to paid plans for complex designs.
Proteus It is very powerful for showing how the software interacts with the hardware connected to the microcontroller, with virtual instruments (timer, function generator, oscilloscope) and SPI/I2C protocol analysis. There is a free trial and licenses from about €200 to €5000.
TinkerCad Circuits, by Autodesk, is 100% online, free, and highly educational. It focuses on the Arduino UNO and allows you to program. with blocks or text and receive frequent updates.
OneArduSim, created by an engineer at Queen's University, is free, multilingual (including Spanish), and is not digitally signed (Windows may warn you when you run it). It comes with a good assortment of devices I/O to validate your designs.
Virtual Breadboard adds a differential component with its AI layer: an integrated ChatGPT for Arduino and Raspberry Pi to assist in design and programming. Interesting to explore ideas and automate tasks.
Virtronics Simulator for Arduino It is one of the most complete: it supports several models (UNO, MEGA), allows you to demonstrate the internal operation and debug. It has a limited free version and a license. about 20 € to unlock everything.
wokwi It lives in the browser and is designed for IoT projects: you choose a board, parts from templates, or start from scratch and test the code online. Quick to iterate without installing anything.
Yenka It is aimed at the educational field, but also serves advanced users. It is multi-device and domestic can be used for free; in educational settings requires a license.
How to choose the simulator that suits you best
Before you jump in, consider budget, learning curve, simulation depth, and future workload. Money mattersOpen source options like KiCad or LibrePCB are perfect for academic and personal projects; suites like Altium or OrCAD are business-oriented and justify their cost with their ecosystem and support.
Your experience also counts: if you're just starting out, EasyEDA or LibrePCB are very helpful; if you're coming from an industry background, you might need more comprehensive analysis and integrated ecosystems (Proteus, PADS Professional, Cadence Allegro). And if you're going for real simulation, Multisim stands out with its SPICE engine, while Eagle is more focused on schematic and physical design.
How to interpret the results of a simulation
In analog, the usual approach is to analyze in time and frequency. A V(t) graph shows step response, overshoot, noise, or oscillations; in current, you see drops in components and dissipations. The frequency sweep gives you the cutoff point, gain, and phase shift; a DC analysis shows static values ​​with no time variation.
In digital, tools like Proteus and logic simulators show time diagrams where bits alternate between 0 and 1. The key is to understand propagation times, edges and synchronization for logic to fulfill timing.
Important: It's not enough to simply look at graphs; you have to compare them with what you expect. If they don't match, there may be design errors, misassigned values or an unrealistic simulation setup (model, tolerances, boundary conditions).
Community and support
Beyond the software, the community saves time. Electronic component forums and subreddits are helpful for practical questions about design, repair, purchasing components, and measuring tools. Share and review projects accelerates learning and prevents you from repeating others' mistakes.
With this full range of courses—free, paid, and online—you can cover everything from educational schematics to industrial PCBs, including SPICE simulation, FFT analysis, virtual instrumentation, and firmware validation on microcontrollers. The key is to align tool and objectiveIf you prioritize speed and smooth curves, go for EasyEDA/LibrePCB and web simulators; if you're looking for analytical rigor, LTspice/Multisim/Qucs; for comprehensive PCB work, massive libraries, and a professional workflow in Windows 11, look to Proteus, Altium, OrCAD, eCADSTAR, and others, always relying on the community and good verification practices.
