Quick guide

The quickest way to start is to open the laboratory: you begin with an example that is already switched on (an RC filter with a generator and an oscilloscope). This page explains the main gestures.

1. Draw the schematic

• Pick a component from the toolbar and click on the sheet to place it. The shortcuts are shown on the icons: R resistor, C capacitor, L inductor, D diode, V voltage source, G ground.
• To connect, press W or drag from a pin: wires follow an orthogonal grid.
• Click a component to change its value in the “Properties” panel: it accepts suffixes such as 1k, 100nF, 10 mH.
• Undo and redo with Ctrl+Z / Ctrl+Shift+Z; F fits the whole schematic in view.

2. Connect the instruments

• Open the “Instruments” panel and add a function generator or an oscilloscope. Each instrument lives in a window that you can move over the sheet and detach into a browser window of its own.
• The generator has a 50 Ω output and the oscilloscope input loads the circuit with 1 MΩ, as in real life: you can switch the loading off to see the difference.
• Place the oscilloscope probes on the nodes of the schematic.

3. Measure

• Press POWER on the oscilloscope and OUTPUT on the generator.
• Adjust TIME/DIV and VOLTS/DIV until the waveform fits the screen; use TRIGGER to hold it still.
• Turn a generator knob (frequency, amplitude, waveform) while you watch: the transient appears live.

4. Save and share

• Every change is saved automatically in your browser: there is no “Save” button.
• From the “Schematics” panel you can duplicate, export a .vlab.json file, import one, or copy a share link.

For experiments to start from, see the Experiments page.