Neutron STEM Lab
Simulation workbenches

Engineering Simulation Workbenches

Simulation-first tools are grouped here so you can go directly to interactive models, visualizers, design environments, and time-domain engineering workbenches. The complete calculator/reference library remains available under Tools.

Available now

These workbenches run in the browser and remain part of their normal engineering subject categories.

10 workbenches
Pendulum Forecast Lab: labelled diagrams and key equations for chaos, nonlinear dynamics, time series, and forecasting.
Physicsadvanced

Chaotic Pendulum Forecast Lab

Integrate a two to seven arm pendulum with Runge-Kutta and race three statistical forecasters against deterministic chaos.

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Control Simulator: a wired block diagram editor with a live scope trace.
Control Systemsintermediate

Control System Simulator

Free browser-based control system simulator with block diagrams, PID tuning, transfer functions, state-space models, step response and Bode analysis. No account or installation required.

Open tool
Electrical design workbench thumbnail showing a source, conductor run, load, voltage-drop trace, and three-phase power symbol.
Electrical Engineeringintermediate

Electrical Engineering Design Workbench

Size and compare conductors, calculate voltage drop and cable loss, and solve DC, single-phase, and balanced three-phase power without jumping between reference charts.

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DIY Power System Designer thumbnail showing solar generation feeding a battery bank, inverter, AC and DC loads, and a power-flow dashboard.
Electrical Engineeringintermediate

DIY Power System Designer

Free off-grid and backup power planner: size batteries, inverter, solar array, and DC wiring from one load list, compare 12/24/48 V designs, simulate a year of dispatch, and export a BOM.

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Lens Ray Simulator: labelled diagrams and key equations for ray tracing, lenses, refraction, and optical materials.
Optics & Photonicsintermediate

Multi-Stage Lens Ray Simulator

Trace parallel rays through configurable spherical lens surfaces using Snell’s law and inspect focal behavior and spherical aberration.

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Rocket Engine CEA Simulator thumbnail with a rocket nozzle, chamber-to-exit flow visualization, specific impulse and equilibrium composition metrics, and performance charts.
Aerospace & Rocket Scienceadvanced

Rocket Engine CEA Simulator

Free browser-based rocket CEA: solve chamber equilibrium, flame temperature, exhaust composition, c*, thrust coefficient, and specific impulse for real propellants using NASA Glenn data.

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NASA Thermo Data: labelled diagrams and key equations for thermochemistry, NASA data, entropy, and Gibbs free energy.
Chemistryintermediate

NASA Glenn Thermochemical Data Explorer

Standard heat capacity, enthalpy, entropy, and Gibbs energy for 49 species from NASA’s published polynomial fits, with reaction properties and equilibrium constants across temperature.

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Orbital mechanics trajectory visualization with spacecraft orbit, central body, transfer geometry, and orbital parameters.
Aerospace & Rocket Scienceintermediate

Orbital Mechanics Simulator

Free online orbit simulator: propagate spacecraft trajectories around Earth, the Moon, Mars, or the Sun, plan RTN burns and Hohmann transfers, and animate it in a rotatable 3D-style view.

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Mechanical gearing illustration showing spur gears, an internal ring gear, and a planetary gear arrangement with speed and torque readouts.
Mechanicalintermediate

Mechanical Gear Train Simulator

Free online gear train simulator for spur, compound, internal, and planetary gears. Animate the mesh and get gear ratio, output speed, direction, and torque instantly. No account needed.

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Materials science visualization showing a three-dimensional crystal lattice with atoms, unit-cell edges, crystallographic directions, and a Miller plane.
Materials Scienceintermediate

3D Crystal & Molecular Lattice Viewer

Free 3D crystal and molecular lattice viewer: SC, BCC, FCC, HCP, diamond, ionic, and custom unit cells, with Miller planes, directions, nearest neighbors, and XYZ/CIF export.

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