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.

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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

Plan, simulate, document, and export a small off-grid, backup, mobile, workshop, or experimental power system from one shared load list: compare 12 V/24 V/48 V/higher-voltage DC architectures; screen…

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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

Solve rocket engine performance from chemical equilibrium: adiabatic flame temperature, product composition, characteristic velocity, thrust coefficient, and specific impulse for real propellant…

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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 browser-based orbital mechanics simulator for propagating spacecraft trajectories around Earth, the Moon, Mars, Jupiter, the Sun, or a custom central body.

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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 browser-based mechanical gear train simulator for spur, compound, internal, and planetary gear systems. Explore speed ratio, rotation direction, torque multiplication, mesh velocity, and basic…

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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 browser-based 3D crystal and molecular lattice viewer for common materials structures and custom unit cells. Inspect SC, BCC, FCC, HCP, diamond, ionic, semiconductor, ceramic, graphene, and…

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