Powdertron

circuit simulator, not a wiring puzzle. Batteries, resistors, capacitors, inductors, logic gates, seven-segment displays and an oscilloscope, connected by actual nets rather than cell adjacency. Build something that works, package it into a named chip, and drop that chip into your next design.Wind TunnelDraw a shape, put it in the airflow, and see what happens. A lattice-Boltzmann solver renders live streamlines, pressure across the surface of the body, and the point where the flow separates.Optics BenchLenses, mirrors and prisms with wavelength-accurate refraction. Split white light into its spectrum, chase a focal point, or build something that shouldn't work and find out why it doesn't.Learn it by breaking itEvery material carries its real formula and properties, and reactions you trigger are logged as discoveries as you find them. A guided tutorial and a set of story challenges give you somewhere to start if a blank canvas is too much choice.Build togetherHost a session over Steam and share a canvas with friends. Everyone paints into the same world, sees each other's cursors, and watches the same simulation run. Name your worlds, give each its own physics settings, and lock the session with a password if you'd rather keep it private.Make it yoursAdd your own materials through the mods folder, save and load worlds, capture screenshots, and export measurement data straight to CSV for when the sandbox turns into an experiment.