Video 4: How to Control LEDs
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This lesson demonstrates how to control LEDs using Arduino digital output pins.

* **LED basics:** Explains LED polarity and the need for current-limiting resistors.
* **Wiring LEDs:** Shows how to connect an LED to an Arduino pin.
* **Digital output:** Demonstrates controlling LED states using code.
* **Simple sketches:** Uses basic sketches to turn LEDs on and off.

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