Problem with connecting LED STRIP 5volt

Using Arduino Programming Questions
#1

First off all, hello ladies and gentleman.

I am a new commer to this world, i understand a bit of programming languages and logics, but i am struggling with a problem connecting a LED strip that i bough on a store, with a 5v charger( that also means i can use it from arduino directly ( i think).
Those fotos shows as 4.5 Volts, but my is 5v!

My problem is:

http://postimg.org/image/47ge3uu9d
(in case the link is dead for “some reason” you can find it also here)

is shows 4 inputs, 5v, R, G, and B.

i connect 5V to 5V from arduino, and i am using the R G B as a “way” to ground through arduino… ( maybe this is my failure here, i don´t know)

everything is working with my code, BUT, it turns just ON or OFF, and the analogWrite is working on the oposite as it should… for example if i write

analogWrite(LED_G,255);

it turns OFF

and

analogWrite(LED_G,0);

it turns ON

which in someway makes sence… “someway” because it is connected on the oposite…

anyway, i didnt though this could be a big issue, until i decided to try to make colours using the dim of the LED…well… it just doesn´t work… well… kind of

  • Serial.println(“More”);*

  • Serial.println(“255”);*
    analogWrite(LED_G,255); LED turns OFF ( if on)
    Serial.println(analogRead(LED_G)); shows 1022 on SERIAL

  • delay(1000);*

  • Serial.println(“0”);*
    analogWrite(LED_G,0); LED IS ACTUALLY ON
    Serial.println(analogRead(LED_G)); shows 334 on SERIAL

  • delay(1000);*

  • Serial.println(“125”);*
    analogWrite(LED_G,125); LED IS ACTUALLY ON
    Serial.println(analogRead(LED_G)); ** shows 335 on SERIAL**

  • delay(1000);*

  • Serial.println(“150”);*
    analogWrite(LED_G,150); LED IS ACTUALLY OFF
    Serial.println(analogRead(LED_G)); shows 1021 on SERIAL

  • delay(1000);*

  • Serial.println(“200”);*
    analogWrite(LED_G,200); it stays always OFF after "150"

  • Serial.println(analogRead(LED_G));*

  • delay(1000);*

I my best guess would be around the circuit itself and not the code… but this was already a “debug” phase…let´s call it that way.

electronics is not my real thing, so i maybe need some help on that subject.

thanks for the help guys, i already tryed to find on google help on this matter, but i am only able to find LED STRIPS with more then 5v, so its not really helpfull, because i dont want to use any kind of relays or so.

Sorry also for my english, it is not my main language.

Thanks for any help or tip.

code.txt (2.26 KB)

#2

Post your code.
Use code tags.

analogWrite(LED_G,150);                LED IS ACTUALLY OFF            
        Serial.println(analogRead(LED_G));

What is the value of LED_G?

#3

Code is here, sorry.

#include <IRremote.h>

#define BLUE 0x40BECA35
#define RED 0x40BEE817
#define GREEN 0x40BE08F7
#define ALL_OFF 0x40BE6A95
#define MORE 0x40BE8A75
#define LESS 0x40BE48B7


#define LED_G A0 // choose the pin for the LED
#define LED_B A1 // choose the pin for the LED
#define LED_R A2 // choose the pin for the LED
#define brilho_passo 50

#define RECV_PIN 11

int state_B = 255;
int state_R = 255;
int state_G = 255;


IRrecv irrecv(RECV_PIN);
decode_results results;

void setup()
{
  Serial.begin(9600);
  irrecv.enableIRIn(); // Start the receiver

  pinMode(LED_G,OUTPUT);
  pinMode(LED_R,OUTPUT);
  pinMode(LED_B,OUTPUT);

}

void loop() {
  if (irrecv.decode(&results)){
    Serial.println(results.value, HEX);
    
    switch(results.value)
    {
      case MORE:
      {


        Serial.println("More");
        Serial.println("255");
        analogWrite(LED_G,255);
        Serial.println(analogRead(LED_G));
        delay(1000);
        
        Serial.println("0");
        analogWrite(LED_G,0);
        Serial.println(analogRead(LED_G));
        delay(1000);
        
        Serial.println("125");
        analogWrite(LED_G,125);
        Serial.println(analogRead(LED_G));
        delay(1000);
        
        Serial.println("150");
        analogWrite(LED_G,150);
        Serial.println(analogRead(LED_G));
        delay(1000);
        
        Serial.println("200");
        analogWrite(LED_G,200);
        Serial.println(analogRead(LED_G));
        delay(1000);

        break;
      }

      case LESS:
      {

        break;
      }
      
      case GREEN :
      {
        Serial.println("vem aki? verde");
       analogWrite(LED_G,0);
       
       break;
      } 
      case BLUE :
      {
        Serial.println("vem aki? azul");
       analogWrite(LED_B,0);
       
       break;
      }
       case RED :
      {
        Serial.println("vem aki? vermelho");
       analogWrite(LED_R,0);
       
      break;
      }
      default:
      
        Serial.println("vem aki? todos 255");
      analogWrite(LED_G,255);
      analogWrite(LED_B,255);
      analogWrite(LED_R,255);
      
    }
    

  delay(200);
  
  irrecv.resume(); // Receive the next value
}
  
}

My serial shows this:

More
255
1023
0
337
125
339
150
1023
200
1023
#4

So you're trying to use the analogue pins LED_R etc as both inputs and outputs?

#5

shouldn't it be an output?

just changed ( for curiosity)

pinMode(LED_G,INPUT);

Serial shows this:

More
255
1023
0
337
125
338
150
1022
200
1023

and results are the same.

when i do analogRead, if to know how is it "shinning"

#6

OK, let's assume that A0 is an output, because that's what you set it to be in setup().
But it's not a PWM output, so an analogWrite to it will be off for values less than 128 and on for values equal to or greater than 128.

#7

hmm.. well it works with a PWM output, i notice that it only will work with 6,5,3 because of that ~ ( i would say) .. anyway it works the way i want :slight_smile: thanks AWOL

you can close this if you want

#8