Electronics figures

Little workbenches you can play with. Turn knobs, flip switches, and watch the current move, the lamps glow and the meters swing.

Parts coloured blue are the ones you can click or drag.

A battery box, a resistor and a glowing red LED on a white bench

How a resistor works

Change the voltage or the resistor and see how bright the LED gets, and what happens when too much current burns it out.

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A capacitor bench with two LEDs, a knife switch and a battery box

Capacitor and LED

Watch a capacitor fill and empty: the green LED lights while it fills, the red one while it empties.

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A coil, a switch and an LED on a bench

Inductor (coil)

A coil doesn't like sudden changes. The LED is slow to light up, and keeps glowing for a moment after you switch off.

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A capacitor and a coil side by side, each with a lamp, sharing one switch

Capacitor vs coil

Both parts side by side. Try steady power, a slow wiggle or a fast wiggle, and compare how differently they react.

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