having problems with Led Fadin and connecting a White Led Stripe

Projects Programming
1

hello hello,
I'm sorry i'm french , even if i hope i have a good english tell me if you don't understand me. :blush:

I expose you my problem :
I'm trying to do a sensor lamp, if you touch a piezo sensor, you increase a LED strip in 5 step.
The code is fine for it. The real problem is to fade my led step by step .
I found lot of exemple to fade a led, but it's always to fade it from 0 to 255, i need to fade from 0 to 50, after from 50 to 100 ...

Here is the code without any fade (sorry the description is in french)

int PIEZO = A0; // Piezo branché sur la pin analog A0
int LED = 11;   //Led branchée sur la pin PWM 11
int PIEZOReading;   //Lit les valeurs analog du piezo                
int PIEZOCompteur = 0;  // Compte le nombre de caresse

void setup() {
     Serial.begin(9600); // Envoi de message de déboggage sur connexion série
     pinMode(LED, OUTPUT); // Configure la led en sortie
     pinMode(PIEZO, INPUT); // Configure le Piezo en entrée
}
  
void loop() {
   
    PIEZOReading = analogRead(PIEZO); //lit la valeur de mon piezo  

    if (PIEZOReading>7){ //A chaque fois que mon piezo dépasse 7 je rajoute +1 à mon compteur
PIEZOCompteur=PIEZOCompteur+1;

    delay(500); //Je met un delay sinon mon compteur va augmenter trop vite (si c'est le cas augmente le)
    }

    if(PIEZOCompteur>9) { // "si j'ai fais mes 9 caresses pour augmenter diminuer l'intensité mon compteur revient a 0 "(=led éteintes)
      PIEZOCompteur = 0;  //Remet mon compteur à 0 lorsqu'il dépasse 9 pour recommencer le cycle
    }
    
    

    switch (PIEZOCompteur){  // déclare les luminosité pour les différentes caresses (case1=caresse1, case2=caresse2...)
    case 0:  
    digitalWrite (LED,LOW);
    delay (100);
    break;
    case 1:
    analogWrite (LED,50);
    delay (100);
    break;
    case 2:  
    analogWrite (LED,100);
    delay (100);
    break;
    case 3:  
    analogWrite (LED,150);
    delay (100);
    break;
    case 4:  
    analogWrite (LED,200);
    delay (100);
    break;
    case 5:   
    analogWrite (LED,255);
    delay (1000);
    break;
    case 6:   
    analogWrite (LED,200);
    delay (100);
    break;
    case 7:   
    analogWrite (LED,150);
    delay (100);
    break;
    case 8:   
    analogWrite (LED,100);
    delay (100);
    break;
    case 9:   
    analogWrite (LED,50);
    delay (100);
    break;
    
    }
    Serial.print("nb de coups PIEZO = "); 
    Serial.print(PIEZOCompteur);   // permet de lire le nombre de caresses dans le moniteur série 
    Serial.print("\t");
    Serial.print("PIEZO reading = ");
    Serial.println(PIEZOReading);      // permet de lire les valeurs analogiques du Piezo (0-1023) dans le moniteur série
 }

I have an other pb :
I want to use a led stripe 24V warm white, i have a rgb shiel but i don't know what kind of alimentation i need because i tried with 24v and it didn't work. Maybe it's my connexion is bad. Do you know any exemple like that i can refer?

Thx you a lot ! I can't stop tearing my hair ^^

2

I'm sorry i'm french

Why are all French people sorry that they are French?

    if (PIEZOReading>7)
    {
       PIEZOCompteur=PIEZOCompteur+1;
       delay(500);
    }

What values ARE you reading from the sensor? A threshold of 7 seems pretty low.

The real problem is to fade my led step by step .
I found lot of exemple to fade a led, but it's always to fade it from 0 to 255

Why can't you change the limits of the for loop?

Here is the code without any fade

It's the fade part that isn't working, so it's the fade code that you need to share.

3

I'm not sorry to be french, i'm just sorry for my language errors (it happens^^)

What values ARE you reading from the sensor? A threshold of 7 seems pretty low.

about the value of the sensor , 7 is really low but it's perfect for me, and it's working
i'm hidding the piezo sensor under a textile, i'm doing a senor lamp with textile and we need to press the textile 5 time to increase the intensity of the led stripe and 5 time to turn off the light .

Why can't you change the limits of the for loop?

I tried with :

 switch (PIEZOCompteur){  // déclare les luminosité pour les différentes caresses (case1=caresse1, case2=caresse2...)
    case 0:  
    digitalWrite (LED,LOW);
    delay (100);
    break;
    case 1:
    for (int i = 0; i < 50; i++){
    analogWrite (LED,50);
    delay (100);
     }

But it's not working
i know i have to do it like in the exemple for - Arduino Reference but i don't know what i'm doing wrong and i use de for loop badly.

4 
    for (int i = 0; i < 50; i++){
    analogWrite (LED,50);
    delay (100);
     }

The difference between that for loop and the one that goes from 0 to 255 is not in the for statement. It is in the fact that each time through the loop you write the same value to the pin. Write the value of i to the pin, not the constant 50.

5

Sorry i wrote it badly i tried with

    for (int i = 0; i < 50; i++){
    analogWrite (LED,i);
    delay (100);
     }

but it's not working

6

but it's not working

Are you sure that the case is even being executed?

Serial.print() statements are your friends.

7

Hello Hello i'm back,
Actually i didn't use thé serial.print , and by using it i realized that my LED was constantly writing something around 20. The LEDMax is around 529 and the LEDMin was around 12 . Do you know why it's like that while the analog values of the led should be between 0 and 255 ? How do i calibrate it?
Here is the code

ps : thank you a lot, I'm getting better ising arduino thanks to you! :smiley:

int PIEZO = A0; // Piezo branché sur la pin analog A0
int LED = 5;   //Led branchée sur la pin PWM 11
int PIEZOReading;   //Lit les valeurs analog du piezo                
int PIEZOCompteur = 0;  // Compte le nombre de caresse
int LEDValue;

void setup() {
     Serial.begin(9600); // Envoi de message de déboggage sur connexion série
     pinMode(LED, OUTPUT); // Configure la led en sortie
     pinMode(PIEZO, INPUT); // Configure le Piezo en entrée
}
  
void loop() {
   
    PIEZOReading = analogRead(PIEZO); //lit la valeur de mon piezo  
    LEDValue = analogRead(LED); //lit la valeur de mon piezo 

    if (PIEZOReading>7){ //A chaque fois que mon piezo dépasse 7 je rajoute +1 à mon compteur
PIEZOCompteur=PIEZOCompteur+1;

    delay(500); //Je met un delay sinon mon compteur va augmenter trop vite (si c'est le cas augmente le)
    }

    if(PIEZOCompteur>9) { // "si j'ai fais mes 9 caresses pour augmenter diminuer l'intensité mon compteur revient a 0 "(=led éteintes)
      PIEZOCompteur = 0;  //Remet mon compteur à 0 lorsqu'il dépasse 9 pour recommencer le cycle
    }
    
    

    switch (PIEZOCompteur){  // déclare les luminosité pour les différentes caresses (case1=caresse1, case2=caresse2...)
    case 0:  
    digitalWrite (LED,LOW);
    delay (100);
    break;
    case 1:
    analogWrite (LED,50);
    delay (100);
    break;
    case 2:  
    analogWrite (LED,100);
    delay (100);
    break;
    case 3:  
    analogWrite (LED,150);
    delay (100);
    break;
    case 4:  
    analogWrite (LED,200);
    delay (100);
    break;
    case 5:   
    analogWrite (LED,400);
    delay (1000);
    break;
    case 6:   
    analogWrite (LED,200);
    delay (100);
    break;
    case 7:   
    analogWrite (LED,150);
    delay (100);
    break;
    case 8:   
    analogWrite (LED,100);
    delay (100);
    break;
    case 9:   
    analogWrite (LED,50);
    delay (100);
    break;
    
    }
    Serial.print("nb de coups PIEZO = "); 
    Serial.print(PIEZOCompteur);   // permet de lire le nombre de caresses dans le moniteur série 
    Serial.print("\t");
    Serial.print("PIEZO reading = ");
    Serial.println(PIEZOReading); 
    Serial.print("LED LUMINOSITE = ");
    Serial.println(LEDValue);    // permet de lire les valeurs analogiques du Piezo (0-1023) dans le moniteur série
 }
8

Actually i didn't use thé serial.print , and by using it i realized that my LED was constantly writing something around 20.

Once more, in English. How the hell does a LED "write something around 20"?