3D breadboard simulator in the browser for building real electronics circuits
BBRouter (BBRouter, LLC) makes a browser-based 3D breadboard simulator that runs circuits as they are wired, on desktop or phone. It simulates 74LS, 74HC and CD4000 logic, 555 timers, the 6502 and Arduino sketches, keeps a KiCad-style schematic in sync, checks wiring against imported netlists (KiCad, EasyEDA, Digital, Logisim, SPICE), auto-routes missing wires, includes a virtual scope, and prints build sheets and bills of materials for real builds. It launched on Show HN with Ben Eater's SAP-1 8-bit computer and is free to start with a paid Maker plan.