Electrical Engineering Simulators
Circuits you can build, machines you can load, logic you can run. These tools cover electrical engineering from Ohm’s law and Kirchhoff’s laws through AC, three-phase and electromagnetism to motors, electronics, PLC control and house wiring.
- 22 tools
- 6 topics
DC Circuits
Current, voltage and resistance in steady circuits, and the first transient: a capacitor charging through a resistor.
Ohm’s Law & DC Circuits
Solve V, I, R and P from any two values, then build and run series, parallel and mixed circuits.
Kirchhoff’s Laws
Multi-loop circuits by KCL and KVL: mesh currents, node voltages and branch power, every equation shown.
Wheatstone Bridge
Balance the bridge to find an unknown resistance, and watch the galvanometer when it is off balance.
Capacitors in Series & Parallel
Equivalent capacitance of series, parallel and mixed banks, with the charge and energy each capacitor holds.
RC Circuit
Charging and discharging on a scope, the time constant, energy lost, and the low- and high-pass Bode plot.
AC Circuits & Three-Phase
Alternating current: impedance, phase and resonance, then the three-phase systems that carry power.
Electromagnetism & Electrical Machines
Induction from first principles to the machines built on it: generator, transformer and motors.
Magnetic Playground
A magnet sandbox with an electromagnet, a current wire and a coil + meter, plus F = BIL, a DC motor, a generator and charged particles.
Faraday’s & Lenz’s Laws
Move a magnet through a coil and watch flux, induced EMF and the direction of the current.
AC Generator
Turn the rotor and read the EMF waveform, terminal voltage and torque; frequency from poles and speed.
Transformer
Turns ratio, the EMF equation, regulation and efficiency, with open- and short-circuit tests.
DC Motor
Shunt, series and compound machines on a test bench: brake, Swinburne, speed-control and retardation tests.
Induction Motor
Three- and single-phase: torque–slip curve, no-load and blocked-rotor tests, star-delta starting.
Electronics & Sensors
Semiconductor devices and a transducer: rectification, the junction transistor and the thermocouple.
Digital Logic & Control
From Boolean algebra to the controllers that run machines: gates, minimisation, ladder logic and relay control.
Logic Gates
Build circuits from AND, OR, NOT, NAND and XOR, convert Boolean expressions, and read truth tables and timing diagrams.
Karnaugh Map
Simplify 2- to 5-variable Boolean functions to SOP or POS with the prime implicants shown.
PLC Ladder Logic
Write and run ladder programs with timers, counters and a function-block view.
Electro-Pneumatic Circuits
Relays, sensors and solenoid valves driving pneumatic actuators on one sheet.
Wiring & Components
The practical side: reading components and wiring a house circuit that works and trips safely.
From One Resistor to a Running Motor
Electrical engineering is built in layers, and each one reuses the last. Ohm’s law describes a single resistor; Kirchhoff’s laws extend it to any network. Add a capacitor or an inductor and time enters: the circuit has a transient, and under alternating current it has an impedance with a phase angle. Faraday’s law then explains how a changing magnetic field makes a voltage, which is the principle behind every generator, transformer and motor. Electronics and digital logic sit alongside, shaping signals and making decisions, and a programmable controller finally ties sensors to machines. The groups on this page follow that order.
The Laws Behind Each Topic
| Law or quantity | Relation | Where it appears |
|---|---|---|
| Circuits | ||
| Ohm’s law and power | V = IR · P = VI = I²R | Ohm’s law |
| Kirchhoff’s laws | ΣI = 0 at a node · ΣV = 0 round a loop | Kirchhoff, bridge |
| RC time constant | τ = RC | RC circuit |
| Series resonance | f0 = 1 / 2π√(LC) | RLC circuit |
| Three-phase power | P = √3 VLILcosφ | Star-delta |
| Electromagnetism and machines | ||
| Faraday’s law | ε = −N dΦ/dt | Faraday, generator |
| Transformer ratio | V₁/V₂ = N₁/N₂ · E = 4.44fNΦm | Transformer |
| Synchronous speed | Ns = 120f/P | Induction motor, generator |
| DC machine back-EMF | Eb = V − IaRa | DC motor |
A Sensible Order for an Electrical Course
- Components and Ohm’s law — reading resistors, series and parallel, power.
- Network analysis — Kirchhoff’s laws, the Wheatstone bridge, capacitor networks.
- Transients and AC — the RC circuit, then impedance, phase and resonance.
- Three-phase systems — star and delta, line and phase values, power.
- Electromagnetism and machines — Faraday’s law, the generator, the transformer, DC and induction motors.
- Electronics, logic and control — rectifiers and transistors, Boolean logic, ladder logic.
Simulation and Real Installations
The house wiring simulator teaches circuit logic — which conductor goes where and why a protective device trips — but domestic wiring rules differ between countries, for example BS 7671 in the UK and the National Electrical Code in the US. Treat it as preparation for a practical course, and follow the local code and a qualified electrician for any real installation. The same caution applies to the machine models: they are validated against standard equivalent-circuit theory, which is what a course teaches, not against a particular manufacturer’s motor.
Frequently Asked Questions
In what order should I learn electrical circuits?
Start with Ohm's law and series and parallel circuits, then Kirchhoff's laws for networks. Move to capacitors and the RC transient, then alternating current, impedance and resonance, then three-phase systems. Electromagnetism and electrical machines follow, with electronics and digital logic usually taught alongside.
What is the difference between AC and DC circuit analysis?
In a DC circuit in steady state, only resistance limits current, and Ohm's and Kirchhoff's laws are applied to real numbers. In an AC circuit, inductors and capacitors add reactance that depends on frequency, so voltages and currents have a phase as well as a size, and the same laws are applied to complex impedances instead.
Are these suitable for electrician or electrical technician training?
Yes. The circuit, three-phase, machine and wiring tools match the content of electrical installation and electrical engineering technician programmes. They are for learning the principles; practical competence on real equipment, under the local wiring code, is still assessed separately.
Do the simulators cover digital logic and control?
Yes. There are tools for logic gates and Boolean expressions, Karnaugh map minimisation, PLC ladder programming with timers and counters, and electro-pneumatic control with relays and solenoid valves.
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