Labo Élec

electrical lab simulator
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Labo Élec

Online electric circuit simulator

Labo Élec is a free electric circuit simulator that runs in the browser, with no installation and no account: a breadboard, components, measuring instruments and a schematic view with standard symbols.

What you can build

An adjustable power supply or cells, resistors (E12 series or any value, with their colour bands), lamps that glow according to their power and burn out when overloaded, a motor, a potentiometer, switches, conductor wires with adjustable length, cross-section and material, red and black cables and link chips to join the holes of the board.

What you can measure

Voltmeter, ammeter, ohmmeter and wattmeter, with range selection and digital or needle display. The simulator flags a wrongly connected instrument, a short circuit or an exceeded range, shows current arrows and, with a simulated clock, computes the quantity of electricity Q = I·t and the energy W = P·t.

How the circuit is solved

As soon as a loop is closed, the circuit is solved in real time with Ohm's law and Kirchhoff's laws (nodal analysis). The schematic view with IEC 60617 symbols is redrawn at every change: you see the real circuit and its diagram side by side.

Who is it for?

Technical and vocational secondary students, students in a preparatory year or training as electricians, and teachers who want to project an experiment in class. Risk-free: you can burn out a lamp, short a cell or exceed a range just to see what happens.

Getting started

All sheets · Learning paths · All formulas

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

Confirmer

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