Build and Simulate Circuits in Your Browser
A free browser-based electronic circuit simulator with drag-and-drop components, animated current flow, and real-time voltage/current readouts. Build circuits with batteries, resistors, LEDs, capacitors, switches, and diodes. Load example circuits or create your own — all in your browser.
How to Use the Circuit Simulator
Drag components from the palette onto the canvas. Click a component to select it and edit its properties (voltage, resistance, etc).
Click the Wire tool, then click two component terminals to connect them. The wire auto-routes between endpoints.
Click Simulate to run the DC analysis. See current flow animated through wires and voltage levels displayed at each node.