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Converts wall power to levels needed for circuits.
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Keeps batteries secure and connects them to the circuit.
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Always use resistors with LEDs to prevent burning.
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Uses two resistors to create smaller voltages.
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Prevents floating voltage in microcontroller pins.
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Icons like zigzags or arrows represent real components in diagrams.
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A drawing that shows how components connect electrically.
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Allows variable control like dimming lights or volume knobs.