Classical Circuit Simulator

Digital logic · schematic · analysis

Component Library

Tap a component, then tap the canvas to place. Click pins to wire.

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Idle Snap Device physics Right-click menu · X delete · W wire · zoom in for device physics

Inspector

Select a component

Run analysis tools above. Truth tables require combinational primary inputs and outputs.

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Search component library

Browse stock parts, or define your own (appears under Custom in the palette). Double-click modules on the canvas to view inside logic. Open insides as a new circuit tab.

Project

Import JSON

Qubi Classical

Syntax cheat sheet

a, b = SWITCH
c = AND [a, b]
s, cout = FULLADD [a, b, cin]
fa = FULLADD [a, b, cin]
LED [fa.s]
LED [c] {color: "green"}
LABEL "Inputs"
// comments: // and /* */
// AND/OR/NAND pick arity from [ ]

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Gate delay (ns) Default clock (Hz) Timing capture steps Show grid Live simulate while editing

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Module internals

Custom component

Define a reusable black-box with your own evaluate formula. Use input ids i0, i1, … and return { y: 0|1 } (or more outputs).

Type id (A–Z, 0–9, _) Display label Inputs (1–4) Preset logic Expression (inputs as i0,i1,… — result is Y) Description

Physical structure