Arduino Control with Potentiometer

Learn how to read analog input from a potentiometer and control an output (e.g., LED brightness).

Step 1: Gather Components

Arduino Uno
Potentiometer (10k Ohm)
LED
220 Ohm Resistor
Jumper Wires
Breadboard

Step 2: Wiring the Circuit

Connect the potentiometer and LED to the Arduino:

Potentiometer: Connect the two outer pins to Arduino 5V and GND, and the middle pin (wiper) to an Arduino Analog Input Pin (e.g., A0).
LED: Connect the anode to an Arduino Digital PWM Pin (e.g., Pin 9) through the resistor, and the cathode to GND.

Wiring Diagram for Potentiometer Control

Step 3: Arduino Code


          // Placeholder for Potentiometer Control Arduino Code
          const int potPin = A0;
          const int ledPin = 9;
          int potValue;
          int ledBrightness;
          void setup() {
            pinMode(ledPin, OUTPUT);
            Serial.begin(9600);
          }
          void loop() {
            potValue = analogRead(potPin);
            ledBrightness = map(potValue, 0, 1023, 0, 255);
            analogWrite(ledPin, ledBrightness);
            Serial.println(ledBrightness);
            delay(100);
          }

Step 4: Upload and Observe

Upload the code to the Arduino. Rotating the potentiometer should change the brightness of the LED.