Open Source · Free Forever
Build. Wire. Simulate.
The open-source lab bench for digital logic — right in your browser, no hardware required.
Also available as a Windows Desktop App.
Everything you need to learn Digital Logic
One platform. Real tools. No textbook required.
IC Circuit Board
Place real 74LS and 74HC series ICs on a virtual breadboard, wire them up, and simulate logic behavior instantly.
Logic Minimization
Solve K-Maps up to 5 variables using Quine-McCluskey. Get simplified SOP and POS expressions in one click.
Waveform Viewer
Watch timing diagrams update in real time as you simulate your circuit — catch glitches and propagation delays visually.
FSM & ASM Charts
Build finite state machines visually with a drag-and-drop editor, then auto-generate clean ASM flowcharts from your design.
HDL Export
Export any circuit or FSM to synthesizable VHDL or Verilog with one click — ready for Quartus or Vivado.
Learning Mode
Follow step-by-step walkthroughs for every topic, attempt embedded quizzes, and track your progress as you go.
Start building in seconds
No setup. No installation. Pick a module and go.
IC Circuit Board
Place real 74LS and 74HC series ICs on a virtual breadboard and wire them up.
K-Map Solver
Minimize boolean expressions up to 5 variables with Quine-McCluskey.
FSM Builder
Design finite state machines visually and auto-generate ASM charts.
