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Arduino Tinkering : Controlling multiple LED with multiple potentiometers

HELLO THERE!!!!
           How are you guys? I hope everyone is fine and well always. For this week's post, I would like to share with you guys a simple tinkering on Arduino, LED, and potentiometers. The objective of the experiment is to light up different amount of LED's with different intensity by controlling two potentiometers. Before starting, of course, we need to know what items are needed.

The items needed are:

1. Arduino UNO
 2. 4 to 5 LEDs
3. 2 Potentiometers


The software used in this experiment is:

1. Arduino IDE.



Now that all the hardware and software are obtained, let's go to the schematics of the circuit. The circuit is quite simple actually. The long legs of the LED's were connected to PWM pins while the shorter legs were connected to ground. The potentiometers however have three legs. The middle leg is connected to the analog pins (A0, A1) while the other two legs were connected to 5V and GND respectively. Don't worry, the schematics is shown as below:



the schematics of the circuit

Upload the code below to the Arduino board using Arduino IDE:


int pot1= A0;//Declare pot1 to be analog pin A0
int pot2 =A1;//Declare pot2 to be analog pin A1
int LED1= 3;  // Declare LEDPin to be arduino pin 3
int LED2= 5;
int LED3= 6;
int LED4= 9;
int val1; 
int val2; 
 
void setup() {
  pinMode(pot1, INPUT);  //set pot1 to be an input
  pinMode(pot2, INPUT);  //set pot2 to be an input
  pinMode(LED1, OUTPUT); //set LED1 to be an OUTPUT
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  
  Serial.begin(9600);      
}
 
void loop() {
  
 val1 = analogRead(pot1);  //Read the value pot1
  val1 = map(val1, 0, 1023, 0, 180);//map the value to 180. you can change this if you want
 val2 = analogRead(pot2); //Read the value pot2
   val2 = map(val2, 0, 1023, 0, 180);
 Serial.println(val1);
 
 
 if (val1 > 20 && val1 < 80)//the first pot value determines the amount of led lights up
 {
   digitalWrite(LED1,HIGH);//turn on and off selected leds
   digitalWrite(LED2,LOW);
   digitalWrite(LED3,LOW);
   digitalWrite(LED4,LOW);
   analogWrite(LED1,val2);//the intensity of the led is controlled by the second pot
 }
 if (val1 > 80 && val1 < 140)
 { 
   digitalWrite(LED1,HIGH);
   digitalWrite(LED2,HIGH);
   digitalWrite(LED3,LOW);
   digitalWrite(LED4,LOW);
   analogWrite(LED1,val2);
   analogWrite(LED2,val2);
 }
 if (val1>140 && val1<160) 
 { 
   digitalWrite(LED1,HIGH);
   digitalWrite(LED2,HIGH);
   digitalWrite(LED3,HIGH);
   digitalWrite(LED4,LOW);
   analogWrite(LED1,val2);
   analogWrite(LED2,val2);
   analogWrite(LED3,val2);
 }
 if (val1 > 160)
 {
   
   digitalWrite(LED1,HIGH);
   digitalWrite(LED2,HIGH);
   digitalWrite(LED3,HIGH);
   digitalWrite(LED4,HIGH);
   analogWrite(LED1,val2);
   analogWrite(LED2,val2);
   analogWrite(LED3,val2);
   analogWrite(LED4,val2);
 }
 
}


After uploading the code to the arduino, it is time to test it!!!! The sample video for this experiment is shown below:














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