Virtual Circuit Board

Virtual Circuit Board is a drawing-based logic simulator with an assembler and simulation engine. In its sandbox, you build and experiment with logic circuits, setting your own goals. It has no tutorials, levels or challenges, and does not teach digital logic or assembly; it is designed for players with some basic knowledge of logic gates and circuits.

Build and edit circuits

You draw color-coded components such as logic gates and traces. Both support multiple input and output connections. Specialized tools such as the Array let you draw multiple traces at once. You can also draw on decoration layers that override components’ default colors, creating buttons and labels that change appearance with a component’s state.

Write and run programs

The assembly editor lets you define your own instructions and write programs that are assembled into Virtual Memory accessible to your circuits. Work takes place in two modes: while editing, you modify circuits with drawing tools and write programs in the assembly editor; during simulation, you interact with the running circuit and watch assembly instructions execute.

Simulation engine

The engine uses high-performance, tick-based simulation, with signals propagating between components one tick at a time. It can simulate at frequencies of up to millions of updates per second.