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    If you have an Arduino starter kit and just LEDs, you can still create engaging and educational projects. These builds focus on simple wiring, basic coding, and visual effects without requiring extra modules.

    Blinking LED

    Step 1 – Wiring:

    • Connect the LED’s anode (long leg) to Arduino pin 13 through a 220Ω resistor.

    • Connect the cathode (short leg) to GND.

    Step 2 – Code:

    void setup() {
    pinMode(13, OUTPUT);
    }

    void loop() {
    digitalWrite(13, HIGH); // LED ON
    delay(500);
    digitalWrite(13, LOW); // LED OFF
    delay(500);
    }
    Gekopieerd.

    This is the classic "Hello World" of Arduino — perfect for learning pin control and timing.

    LED Fade Effect

    Step 1 – Wiring:

    • Connect LED anode to PWM pin (e.g., pin 9) via a resistor.

    • Cathode to GND.

    Step 2 – Code:

    int brightness = 0;
    int fadeAmount = 5;

    void setup() {
    pinMode(9, OUTPUT);
    }

    void loop() {
    analogWrite(9, brightness);
    brightness += fadeAmount;

    if (brightness <= 0 || brightness >= 255) {
    fadeAmount = -fadeAmount;
    }

    delay(30);
    }
    Gekopieerd.

    This uses PWM to create a smooth dimming effect.

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