How a Resistor Can Save Your LED | Arduino Demo + Code

Why did this LED burn out? 💥
In this quick demo, we show you how a resistor protects your LED from overcurrent and how to control brightness using Arduino PWM with analogWrite().

📌 Topics covered:
– Ohm’s Law (V = IR)
– Series resistor with LED
– analogWrite() LED fade example
– Resistor values and brightness
– Real-world applications

🎓 Perfect for beginners using Arduino or Tinkercad.

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