In this tutorial we will learn how to control the LED brightness with a potentiometer and Arduino.
Watch a demonstration video.
- Arduino UNO (or any other Arduino)
- Jumper wires
- Visuino program: Download Visuino
- Connect potentiometer pin [DTB] to arduino analog pin [A0]
- Connect potentiometer pin [VCC] to arduino pin [5V]
- Connect potentiometer pin [GND] to arduino pin [GND]
- Connect LED positive pin to Arduino digital pin 
- Connect LED positive pin to Arduino pin [GND]
To start programming the Arduino, you will need to have the Arduino IDE installed from here: https://www.arduino.cc/.
Please be aware that there are some critical bugs in Arduino IDE 1.6.6. Make sure that you install 1.6.7 or higher, otherwise this tutorial will not work! If you have not done follow the steps in this tutorial to setup the Arduino IDE to program Arduino UNO! The Visuino: https://www.visuino.eu also needs to be installed. Start Visuino as shown in the first picture Click on the "Tools" button on the Arduino component (Picture 1) in Visuino When the dialog appears, select "Arduino UNO" as shown on Picture 2
Connect Arduino AnalogIn pin[Out] to Arduino Digital  pin - Analog (PWM)
In Visuino, Press F9 or click on the button shown on Picture 1 to generate the Arduino code, and open the Arduino IDE
In the Arduino IDE, click on the Upload button, to compile and upload the code (Picture 2)
If you power the Arduino UNO module, and change the potentiometer position the LED will change its brightness.
Congratulations! You have completed your project with Visuino. Also attached is the Visuino project, that I created for this tutorial, you can download it here and open it in Visuino: https://www.visuino.eu