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Ohm's Law

Find current from voltage and resistance.

Safety first, always.

ElectroLab AI teaches theory, low-voltage electronics, and planning concepts. Mains voltage, switchboards, fixed wiring, high-current systems, and legal electrical work must only be performed by licensed electricians where required.

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Visual schematic

LED current path

Battery voltage pushes current through the resistor, then the LED. The resistor is the part saving the LED.

Low-voltage model

TP1: supply voltage

TP2: resistor drop

TP3: LED polarity

Diagrams are simplified learning models for low-voltage electronics. They are not wiring instructions for mains, switchboards, fixed wiring, or legal electrical work.

Voltage

Resistance

ohms

Formula notes

I = V / R

Use this for theory and low-voltage electronics. Real circuits need ratings, heat, insulation, and safety checks.

Visual formula bench

Circuit bench view

Change the inputs and watch the current path, load stress, and meter result move together.

Live result

Check the inputs

1. Estimate

Load the example or enter a real low-voltage learning value.

2. Visualise

Use the diagram to connect the formula to current path, timing, frequency, or energy flow.

3. Verify safely

Build only suitable low-voltage circuits and confirm with a meter before scaling up.