LogicNodes

LogicNodes is a web app for building and simulating digital logic circuits: you place gates (AND, OR, NOT, NAND, NOR, XOR, XNOR), inputs, outputs, a clock and a 7-segment display on a node canvas, wire them up, and see the live signals plus a generated truth table, with save/load for your designs.

It targets students and hobbyists learning digital logic and computer architecture who want to experiment with circuits visually instead of on paper.