PREVIEW
DigiSim Museum Open Simulator

The DigiSim Museum

22 machines that built the modern world — running live in your browser. Not videos, not diagrams: working simulations where every gear ratio, electron, and laser fringe is computed from the real physics.

Free to visit · no install · open any exhibit and start turning the crank.

  1. Skeleton Regulator Clock — interactive 3D exhibit c. 1715
    Timekeeping

    Skeleton Regulator Clock

    A pendulum, a deadbeat escapement, and a gear train with nothing to hide.

    Enter exhibit
  2. Double-Acting Steam Engine — interactive 3D exhibit c. 1840
    Power

    Double-Acting Steam Engine

    A slide valve, a slider-crank, a flywheel, and a flyball governor that holds the speed all by itself.

    Enter exhibit
  3. Babbage Difference Engine No. 2 — interactive 3D exhibit c. 1849
    Computing

    Babbage Difference Engine No. 2

    Eight columns of brass figure wheels tabulate any polynomial — turn the crank and read the answer off the gears.

    Enter exhibit
  4. Triode Vacuum Tube — interactive 3D exhibit 1906
    Electronics

    Triode Vacuum Tube

    Inside the glass: a heated cathode, a grid, and the birth of amplification.

    Enter exhibit
  5. Silent-Era Film Projector — interactive 3D exhibit c. 1915
    Cinema

    Silent-Era Film Projector

    A Geneva drive, a phase-locked shutter, and 16 still frames a second pretending to move.

    Enter exhibit
  6. Magnetic-Sector Mass Spectrometer — interactive 3D exhibit c. 1919
    Instruments

    Magnetic-Sector Mass Spectrometer

    Accelerate ions, bend them in a magnetic field, and watch an element fan out into its separate isotopes.

    Enter exhibit
  7. One-Tube Radio — interactive 3D exhibit c. 1925
    Radio

    One-Tube Radio

    Tune the coil, heat the filament, and pull voices out of the air with one triode.

    Enter exhibit
  8. Enigma Cipher Machine — interactive 3D exhibit c. 1938
    Cryptography

    Enigma Cipher Machine

    Type a letter and a storm of rotors turns it into another — never the same way twice.

    Enter exhibit
  9. Field Typewriter, Cutaway — interactive 3D exhibit 1944
    Writing machines

    Field Typewriter, Cutaway

    Forty-three typebars, two shifts, a margin bell — every linkage exposed and working.

    Enter exhibit
  10. Pinwheel Mechanical Calculator — interactive 3D exhibit c. 1944
    Computing

    Pinwheel Mechanical Calculator

    Multiplication by cranked repetition — every carry rippling through real gears.

    Enter exhibit
  11. Magnetic-Core Memory Plane — interactive 3D exhibit c. 1953
    Computing

    Magnetic-Core Memory Plane

    Half a current on X, half on Y — and a single ferrite ring flips while its neighbours hold.

    Enter exhibit
  12. CRT Oscilloscope — interactive 3D exhibit c. 1955
    Instruments

    CRT Oscilloscope

    An electron beam steered by real plate physics, drawing waveforms on phosphor.

    Enter exhibit
  13. Cassette Walkman Transport — interactive 3D exhibit 1979
    Audio

    Cassette Walkman Transport

    A capstan, a slip clutch, and a flywheel — the mechanics that made music portable.

    Enter exhibit
  14. OMNIVOX 2000 CRT Console — interactive 3D exhibit c. 1982
    Computing

    OMNIVOX 2000 CRT Console

    An exposed-chassis CRT television wired to a cartridge console — phosphor and all.

    Enter exhibit
  15. Neuron Lab — interactive 3D exhibit c. 1986
    Machine learning

    Neuron Lab

    A real neural network learning to read digits — every ball a neuron, every wire a weight.

    Enter exhibit
  16. Two-Motor Hybrid Powertrain — interactive 3D exhibit c. 2013
    Automotive

    Two-Motor Hybrid Powertrain

    An Atkinson engine, two electric machines, and a clutch that decides when the engine ever touches the wheels.

    Enter exhibit
  17. LIGO Gravitational-Wave Detector — interactive 3D exhibit 2015
    Physics

    LIGO Gravitational-Wave Detector

    Two laser arms, a dark fringe, and a ripple in spacetime one ten-thousandth of a proton wide.

    Enter exhibit
  18. EUV Lithography Scanner — interactive 3D exhibit c. 2021
    Semiconductors

    EUV Lithography Scanner

    Fifty thousand plasma flashes a second, a dozen mirrors, and the smallest lines humans print.

    Enter exhibit
  19. Megaphragma — In-Silico Micro-Wasp — interactive 3D exhibit c. 2024
    Neuroscience

    Megaphragma — In-Silico Micro-Wasp

    Seven thousand neurons, a feather-winged body, and a brain you can watch think as it flies.

    Enter exhibit
  20. The Brain’s GPS — Grid & Place Cells — interactive 3D exhibit c. 2005
    Neuroscience

    The Brain’s GPS — Grid & Place Cells

    Watch a foraging mouse paint hexagons across the floor — the brain’s own map of space.

    Enter exhibit
  21. The Fly’s Compass — a Ring Attractor — interactive 3D exhibit c. 2024
    Neuroscience

    The Fly’s Compass — a Ring Attractor

    A single bump of activity rides a ring of neurons — the fruit fly’s sense of direction.

    Enter exhibit
  22. The Stomach’s Clock — a Central Pattern Generator — interactive 3D exhibit c. 1998
    Neuroscience

    The Stomach’s Clock — a Central Pattern Generator

    Thirty neurons beat out a rhythm for a lifetime — and one chemical knob reshapes it.

    Enter exhibit

From pendulums to photolithography

The collection runs in chronological order: it opens with a regulator clock settling time one escapement beat at a time, and closes with an EUV scanner printing chip features narrower than a virus. In between are the machines — tubes, gears, beams, engines, and tape — that carried logic from brass to silicon. When you’re ready to build the next chapter yourself, the Logic Lab and Relay Lab are open.