SysEng Sim

Build it, run it, measure it.

A free, browser-based electronics and mechanisms simulator for VCE Systems Engineering. Drag components onto the workplane, wire or mesh them together, and watch the system work – with the calculations alongside.

Unit 1 · Electrotechnological systems

Electronics Lab

Drag-and-drop circuit builder with live simulation, VCAA schematic symbols, a breadboard and a programmable microcontroller.

  • Batteries, PV cells, AC, dynamos, transformers
  • Resistors, LDRs, thermistors, capacitors, diodes, LEDs
  • Transistors, relays, 555 timer, regulators, motors
  • Multimeter, ammeter, voltmeter and oscilloscope
Open Electronics Lab →
Unit 2 · Mechanical systems

Mechanisms Lab

Build drive systems by dropping gears, pulleys, sprockets, worms and racks. Speeds, directions, ratios and torque are calculated live.

  • Simple and compound gear trains, idlers
  • Belts (open and crossed) and chains
  • Worm drives, rack and pinion, winch loads
  • Motor stall, efficiency and power
Open Mechanisms Lab →
Unit 2 · Engineering principles

Simple Machines

Interactive models of the six simple machines and common mechanisms, each with worked calculations students can check.

  • Levers, pulleys, inclined plane, wheel & axle, screw, wedge
  • Cams, crank & slider, linkages, gear types
  • Hydraulics, pneumatics, springs, bearings
  • MA, VR, efficiency, moments, Pascal’s principle
Open Simple Machines →
Teachers · Assessment

Exam Builder

Generate VCE-style multiple-choice and short-answer questions with fresh numbers and worked solutions – or turn any circuit or mechanism into a question.

  • 27 question types across Units 1 and 2
  • One-click practice exams (Section A + B)
  • Print question and solutions books (PDF)
  • Student link with instant self-checking
Open Exam Builder →

Study design coverage

Electrotechnological components (study design)

AC & DC sourcesCells & batteriesPV cellsGenerators & dynamosDC motorsServo motorSolenoids (push/pull/dual)Momentary NO/NC switchesSPST / SPDT / DPST / DPDTMicro, reed & tilt switchesRelaysFixed resistors (colour code)Potentiometer & rheostatLDRNTC & PTC thermistorsCapacitors incl. polarised, variable, superSignal, power, Zener, LED & photo diodesBridge rectifierStep-up / step-down transformersNPN, PNP & phototransistors555 IC & microcontrollerFixed & variable regulatorsLED, 7-segment, LCD & OLED displaysMicrophone, speaker, piezo buzzerFuseMultimeter & oscilloscopeBreadboard

Mechanical components (study design)

Inclined planes & screwsLevers & cranksLinkagesWorm, bevel, crown, spur & pinion gearsSimple & compound gear trainsHydraulic & pneumatic componentsPistons & cylindersCams & followersBelts, pulleys, chains & sprocketsCompression & tension springsBearings

Concepts & calculations

Ohm’s law V = IRPower P = VISeries & parallel resistanceVoltage dividersRC time constantEnergy E = ½CV²Open & closed-loop controlMechanical advantageVelocity ratioEfficiencyMoments & torqueGear ratiosWork, energy & powerPressure P = F/AHooke’s law

For teachers

No accounts, no installs

Everything runs in the browser. Work autosaves on the student’s device; Save downloads a file to submit, and Share link encodes the whole design in a URL you can post to your LMS.

Ready-made examples

Each lab has an Examples menu – LED circuits, voltage dividers, transistor switches, a 555 flasher, an AC-to-DC supply, microcontroller programs, gear trains, winches and more – ready to use as lesson starters.

A model, not the real thing

Components use simplified models chosen to behave realistically for teaching. Use it to explore and predict, then confirm with real components and measuring equipment.