Labo Élec

electrical lab simulator
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Discovery

8 steps

For beginners: first steps in the lab, no prerequisites.

Getting started

Step 1

Place, snap, join with chips and leads, read a measurement: the basic lab moves, step by step. Reminder · Ohm's law & resistance

  1. First resistor level 1
  2. The chips level 1
  3. The switch level 1
  4. The leads level 1
  5. The voltmeter level 2

Ohm's law

Step 2

U = R × I. One resistor, one source: measure, predict, adjust. Reminder · Ohm's law & resistance

  1. A resistor at 9 V level 1
  2. Predict the current level 1
  3. Reach 20 mA level 2
  4. If the voltage doubles... level 1
  5. Dissipated power level 2

Units and readings

Step 3

Converting, reading a dial, recognising symbols: everyday tools. Reminder · Basics & units

  1. Kilo-ohms to ohms level 1
  2. Milliamperes to amperes level 1
  3. IEC symbol: lamp level 1
  4. Reading a needle voltmeter level 2
  5. Prefixes level 1

Series

Step 4

The same current flows through everything: resistances add up, the voltage is shared. Reminder · Resistor networks

  1. Two resistors in series level 2
  2. Voltage sharing level 2
  3. Equivalent resistance level 3

Parallel and mixed

Step 5

Same voltage on every branch, the current is shared. Then series and parallel get mixed. Reminder · Resistor networks

  1. Two resistors in parallel level 2
  2. Branch current level 2
  3. Aim for a parallel resistance level 3
  4. Mixed circuit level 3

Measuring

Step 6

Voltmeter in parallel, ammeter in series, potentiometer to adjust: connect right, read right. Reminder · Measurement & instruments

  1. Voltmeter on R2 level 2
  2. Ammeter in series level 2
  3. Measure, then conclude level 3

Voltage and current

Step 7

What pushes the charges and what counts them: p.d., current direction, Q = I·t. Reminder · Voltage & current

  1. Current direction level 1
  2. Potential difference level 1
  3. The coulomb level 1
  4. Quantity of electricity level 2
  5. Battery autonomy level 3

Troubleshooting

Step 8

Measurements are hidden: read the diagram, look at the board, find the fault and fix it. Reminder · Resistor networks

  1. Short at the source level 2
  2. Wrong value level 3
  3. Two faults level 3
  4. Tricky mixed circuit level 4
Start this course

All paths · All sheets

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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