Project 2.11.2: Potentiometer LED Dimmer

Description	This project uses a potentiometer to control the brightness of an LED through PWM, creating a smooth dimming effect.
Use case	This project can be used in automation systems, interactive installations, and embedded control applications.

Components (Things You will need)

Building the circuit

Things Needed:

• Arduino Uno = 1
• Arduino USB cable = 1
• Potentiometer = 1
• LED = 1
• Breadboard = 1
• Jumper wires

Mounting the component on the breadboard

Step 1: Place the Potentiometer and the LED on the breadboard.

NB: Make sure all components are securely placed on the breadboard with correct orientation.

WIRING THE CIRCUIT

Step 2: Connect one outer pin of the Potentiometer to GND pin on the Arduino Uno using male-to-male jumper wires.

Step 3: Connect the other outer pin of the Potentiometer to 5V pin on the Arduino Uno using male-to-male jumper wires.

Step 4: Connect the middle pin of the Potentiometer to Analog pin A0 on the Arduino Uno using male-to-male jumper wires.

Step 5:Connect the anode (long leg) of the LED to one end of a 220 Ω resistor.

Step 6: Connect the other end of the resistor to Digital Pin 9 on the Arduino.

Step 7: Connect the cathode (short leg) of the LED to GND on the Arduino.

Make sure to connect the Arduino USB cable to the Arduino board.

PROGRAMMING

Step 1: Open your Arduino IDE. See how to set up here: Getting Started.

Step 2: Type the following code in your Arduino IDE: const int potPin = A0;, const int soundPin = A0;, const int ledPin = 9;, int potValue = 0;, int brightness = 0; as shown in the image below.

Step 3: Type the following code in your Arduino IDE: pinMode(ledPin, OUTPUT);, Serial.begin(9600); as shown in the image below.

Step 4: Type the following code in your Arduino IDE inside the void setup() pinMode(ledPin, OUTPUT);, Serial.begin(9600); as shown in the image below.

Step 5: Type the following code in your Arduino IDE inside the void loop() potValue = analogRead(potPin);, brightness = map(potValue, 0, 1023, 0, 255);, analogWrite(ledPin, brightness);, Serial.print("Potentiometer: ");, Serial.print(potValue);, Serial.print(" Brightness: ");, Serial.println(brightness);, delay(10); as shown in the image below.

Step 6: Save your code. See the Getting Started section

Step 7: Select the Arduino board and port. See the Getting Started section

Step 8: Upload your code.

CONCLUSION

This project helps learners understand how to combine multiple components with Arduino to create more complex interactive systems and automation solutions.