Design & Simulate Digital Logic Circuits
An interactive digital electronics playground in your browser. Design combinational and sequential circuits, simulate propagation delays, and generate truth tables automatically.
Engineered for Learners and Makers
True to digital electronics engineering: 4-valued simulation, stable feedback loops, and automated netlists.
4-Valued Netlist Simulation
Real-time propagation of 0, 1, High-Z and undefined states with Union-Find wire graph.
Truth Table Generation
One-click 2^N state generation for all input combinations and boolean function analysis.
Local & Offline Ready
Instant saving to your browser cache, import/export circuits in JSON format without cloud lock-in.
Start with a Template
Pick an educational pre-wired circuit to explore immediately.
Full Adder (1-Bit)
1-bit full adder built with 2 XOR, 2 AND, and 1 OR gates. Adds inputs A, B and Carry-In (Cin) to produce Sum (Σ) and Carry-Out (Cout).
Half Adder
Basic binary adder that adds two single bits using 1 XOR gate (Sum) and 1 AND gate (Carry).
SR Latch (Cross-Coupled NOR)
1-bit memory cell using cross-coupled NOR gates with Set, Reset, and Hold states. Demonstrates feedback loop simulation.
Clock & D Flip-Flop Toggle
Periodic clock generator feeding a D Flip-Flop with inverted Q̄ feedback to divide frequency by 2 and toggle states.