Simulate Logic Gates Online and Check the Truth Table
Build AND, OR, NOT, NAND, NOR, XOR and XNOR in a browser, drive the inputs and read the output. Why a gate needs a supply and a load in a simulator, and the mistake that makes one look broken.
Turning a Schematic Image into a SPICE Netlist
What it takes to read a circuit photo and produce a netlist, what the 2026 research achieves, and how to do it in a browser without training a model yourself.
LTspice Online: There Is No Web Version — Here Is What Works
LTspice has no official browser version and Analog Devices has never shipped one. What that means if you cannot install it, and which browser simulators actually run real SPICE.
What Resistor for an LED? Why the Calculator's Answer Differs
The formula gives one number and your meter gives another. Why forward voltage is not a constant, what that does to the current, and how to check a value before you build it.
Draw a Circuit by Hand and Simulate It in the Browser
Sketch a circuit the way you would on paper, and get a working schematic and a real SPICE simulation. How the reader works, what it handles, and where it struggles.
What Wattage Resistor Do I Need? How to Check Before It Burns
Resistors are sold by resistance and rated by power, and the second number is the one that lets out the smoke. How to work out the dissipation in your circuit and pick a rating that holds.
Why Your Voltage Divider Drops Under Load (With Real Numbers)
The divider formula gives 5 V and your meter reads 0.39 V. Here is why a load changes the answer, what the collapse actually measures, and how to size a divider that holds.
Simulate a Blinking LED Circuit Online (Astable Multivibrator)
Build the classic two-transistor LED flasher in your browser and watch the LEDs actually alternate. Why most simulators show it frozen, and how to set the flash rate with two capacitors.
Multisim Live Is Shutting Down — Free Browser Alternatives (2026)
Multisim Live reaches end of life on 15 September 2026. Here is what happens to your circuits, and an honest comparison of the free browser simulators you can move to.
Free Image to Schematic Converter (No Signup Required)
Every free option for turning a circuit picture into a schematic, and exactly where each one stops — tracing services, editors, PCB tools and ours.
Free: Simulate a Circuit from a Photo of Its Schematic
Photograph a schematic and get a working simulation free in your browser — no redrawing it component by component, no install, no account needed to try it.
Why Your SPICE Simulation Fails (Floating Nodes and Ground)
Singular matrix, no convergence, floating node — what these SPICE errors mean, why a missing ground causes most of them, and how to fix each.
How to Simulate an Arduino Circuit Online Without Hardware
Wire a button and an LED to an Arduino Uno, compile the sketch, and watch the pins change — entirely in a browser, with no board, no IDE, and no install.
How to Design an RC Low-Pass Filter and Simulate It with SPICE
A complete guide on designing an RC low-pass filter. Learn the theory, calculate the cutoff frequency, select resistor & capacitor values, write a SPICE netlist, and run online simulations.
LTspice vs Online SPICE Simulation: Which Is Better for Circuit Design?
A side-by-side comparison of LTspice and browser-based SPICE simulators — solver, models, workflow and collaboration — and which one fits your work.
AI Circuit Design — How Natural Language Generates SPICE Schematics
Learn how AI Circuit Design platforms utilize Natural Language Processing to generate electrical schematics, write SPICE netlists, and automate EDA wire routing.
How to Simulate SPICE Circuits Online (Free Browser Tutorial)
Run electrical circuit simulations inside your web browser. Learn how to construct standard SPICE netlists, configure transient analyses, and plot ngspice signals.