How It Works: Science for Self-Reliance

The core of the system is an electrochemical cell that harnesses the difference in reactivity between two common materials when immersed in a salt solution.

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Anode

Aluminum plate in saltwater releasing electrons

Cathode

Carbon rod receiving electrons, completes circuit

External Circuit

Wire connects electrodes and powers LED

Electrolyte

Saltwater solution enables ion flow

Anode: Aluminum

The aluminum plate acts as the sacrificial anode, easily shedding electrons in the saline solution.

Cathode: Carbon

A carbon rod or charcoal stick serves as the cathode, completing the circuit and allowing electron flow.

Electrolyte: Saltwater

The sodium chloride solution facilitates ion movement, creating a steady, low-voltage electrical current.

TARANGINI