Formula trainer

Move the numbers and watch the maths breathe.

Practise core formulas with sliders, result notes, safety prompts, and direct links to the matching calculators.

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.

Open Safety Center

Formula trainer

Ohm's Law

Estimate current before powering an LED, coil, sensor, or small load.

InputsVoltage: 5 | Resistance: 470I = V / Rsolve for currentResult10.64 mAChange one value, predict the result, then measure the real low-voltage circuit.

Write the formula before touching the calculator.

Check the number with the matching calculator.

Measure the low-voltage circuit and compare expected vs actual.