Electrical Wiring Simulator

Learn house wiring by doing it, on a board where nothing can hurt you.

Connect switches, lamps, fans, sockets, breakers and meters with your finger. Close the breaker, flip the switch, and watch current travel down every wire. The bulb glows, the fan spins up, and the breaker trips when you get it wrong.

This is a simulator with a real circuit solver behind it. Nothing is scripted. Two bulbs in series really are dim. A switch put in the neutral really does leave the lamp holder live. A cable too thin for its breaker really does overheat.

What is inside

• 20 guided lessons, from one switch and one bulb to a two-way staircase, a distribution board with RCCB, a kitchen board, a complete flat, a three-phase board, motor starters, an IPS for load-shedding and a solar panel with its battery

• Find the Fault: boards with a hidden fault. Track it down with the meters, scored on time and number of readings

• Troubleshooting: start from a complaint such as "the fan runs slow" or "the RCCB trips"

• Free Lab: build any circuit you like, save it, and share it as a file

• Test instruments: voltmeter, ohmmeter, clamp meter, neon tester and insulation tester

• Project Builder: lay out a home, office or shop and get proposed circuits, breaker and cable sizes, voltage drop, a single-line diagram and a material list

• Calculators: Ohm's law, power, voltage drop, cable size, breaker size, IPS backup time, solar sizing and your electricity bill

It checks safety, not just whether it works

A circuit that works but is unsafe is caught and explained: what happened, why it matters, and how to put it right. Switch in the neutral, missing earth, reversed socket, undersized cable, wrong breaker, earth leakage, loose connection.

Any correct wiring passes. The app tests what your circuit does, not whether it matches one drawing.

230 V, 50 Hz house wiring

Single-phase and three-phase boards as wired in Bangladesh and much of South Asia: 230 V, 50 Hz, red-yellow-blue phase colours, 5 A and 15 A sockets.

In 20 languages

English, Bangla, Hindi, Urdu, Arabic, Persian, Spanish, Portuguese, French, German, Italian, Russian, Turkish, Indonesian, Malay, Thai, Vietnamese, Chinese, Japanese and Korean. English and Bangla were written by hand. The other eighteen are machine translations that have not yet been reviewed, and may read awkwardly in places.

Works offline

No account. No sign-in. Your lessons, boards and projects stay on your phone. An internet connection is used only for advertisements and purchases.

Free, with Pro if you want it

The free version includes fifteen lessons, every fault scenario, the Free Lab, the Project Builder and all the calculators. It shows advertisements on the menu screens, between lessons, once after the introduction and sometimes when you come back to the app, never while you are wiring. One hint in each lesson is free; further hints are yours for watching a short advertisement.

Pro removes the advertisements, adds the three-phase, motor starter and backup power lessons, gives every hint without an advertisement, and lets you print Project Builder reports or save them as PDF. Pro is a yearly subscription or a single lifetime payment.

Please read

This is an educational simulator. It is not training, certification, or proof that any wiring meets a code. Its proposals are worked from simple rules and stated assumptions, not from a wiring code. Real electrical work can kill: switch off the main supply, test before you touch, and use a licensed electrician.