Build and simulate digital logic circuits right in your browser. Wire up logic gates (AND, OR, NOT, NAND, NOR, XOR, XNOR), latches, flip-flops, shift registers, multi-bit buses, and 7-segment displays; write and compile VHDL modules; inspect truth tables, state machine diagrams, and timing waveforms; then package your designs into reusable chips and share them with the community. No download or sign-up required.