Labo Élec

electrical lab simulator
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Alcala Factory

About Labo Élec

The author

Labo Élec is designed and developed by Alcala Factory, the project workshop of Alcala-Web.be, the website of Raoul Alcala Ruiz: web development, teaching tools and small open projects. This simulator is one of them; the author's site presents the others.

Teaching goal

Handle to understand: build a circuit as in the lab, measure, make mistakes safely, then practise every part of a general-electricity course (basics, Ohm's law, resistor networks, real generators, Kirchhoff, measurement...). Three modes: sandbox, game by learning paths, graded practice.

What the simulator idealises

  • Components without tolerance: a 220 Ω resistor is exactly 220 Ω.
  • Perfect instruments by default (1 GΩ voltmeter, 0.1 mΩ ammeter), adjustable to study measurement error.
  • Steady DC on the board: no simulated transients or AC. The capacitor, induction, AC and RLC chapters are worked through calculations and quizzes.
  • A lamp "blows" above 1.2 × its rated voltage and recovers as soon as the voltage drops.

Teaching sources

The topic split and the guided-problem format (unknown, formula, units, data, result) are inspired by general-electricity courses at pre-technical-college level, including the "Électricité préparatoire" course of ISL (Liège). No statement or figure from those courses is reproduced: all content is original, written by Alcala Factory. Symbols follow IEC 60617.

Your data

Everything is stored in the browser (localStorage), with no account or server: progress, coins, marks, language. Progress is tied to this browser on this device; it disappears if you clear the site data or browse privately. No usage data is sent; the contact form only sends what you type, and the technical context only if you tick the box.

Licence

Content and code © 2026 Alcala Factory, all rights reserved. Free use in class and for personal purposes; no redistribution or reproduction of the content without agreement.

Links

Support the project Alcala-Web.be Contact / Report a bug

Simulated time00:00:00
Q = I·t-
W = P·t-

Workbench

Circuit diagram CEI 60617

How does it work?

The perfboard: each big hole is a circuit node. You push a single leg of a component (resistor, lamp...) into it. The 4 small holes around it are connected to it: that is where chips and leads plug in.

  1. Drag a component onto the board: it snaps onto the grid. R rotates it.
  2. To join neighbouring big holes, click Jumper chip in the palette (or C) then drag on the board: a line of chips is laid at once. Bridged holes become a single node.
  3. For long links and for the power supply (placed next to the board), drag a lead from one big hole to another (or to a terminal).
  4. As soon as a loop is closed, the circuit is solved in real time (Ohm + Kirchhoff) and the diagram follows.
  5. Zoom with the wheel (or + / −, two-finger pinch); drag the background to pan, 0 fits the board. The + buttons around the board add a row or a column.

Del delete · R rotate · C chip brush · Esc cancel · wheel zoom · drag the background to pan

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