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Turn an idea into a circuit you can build, simulate, and understand.
Describe your circuit. Assistant creates it right in your workspace.
Change component values and ask for help setting up simulations.
Get circuit explanations and help using CircuitLab’s features.
Open the editor and find Assistant to get started.
Master the analysis and design of electronic systems with CircuitLab's free, interactive, online electronics textbook.
Open: Ultimate Electronics: Practical Circuit Design and Analysis
from the CircuitLab Community
Easy-wire mode lets you connect elements with fewer clicks and less frustration.
Cross-window copy/paste lets you easily explore and re-mix parts of public circuits from the CircuitLab community.
Mixed-mode circuit simulation lets you simulate analog and digital components side-by-side.
SPICE-like component models give you accurate results for nonlinear circuit effects.
Human-friendly formats let you enter and display values concisely, just like you would on a paper schematic.
Unit-aware expression evaluation lets you plot arbitrary signals of interest, such as differential signals or power dissipation.
In-browser simulation and plotting lets you design and analyze faster, making sure your circuit works before ever picking up a soldering iron.
Unique circuit URLs let you easily share your work or ask for help online.
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“Browser-based circuit simulator boasts a mountain of features.”
“ CircuitLab is the best editor I have ever used. Bug-free design, excellent simulation. Well done. No more using LTSpice. ”
“ In our product development cycle, we've used CircuitLab in more places than you might expect: optimizing our analog front-end, RF matching network analysis, improving our power supply robustness, and designing and documenting test and production fixtures. ”