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07. Using a potentiometer to control the brightness of an LED

A potentiometer is a simple knob that provides variable resistance. With Arduino, it is read as analog values. In this project, we will see how the potentiometer controls the brightness of the LED.

Supplies

  • LED
  • Resistor - 220Ω
  • Potentiometer


  • Arduino Uno R3
  • Solderless Breadboard - Mini
  • Jumper wires

Setting up your hardware


Connections

  • Cathode (LED) ---> Ground (GND)
  • Anode (LED) ---> D9 
  • Middle pin of potentiometer ---> A0

Coding


Final Look


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