RGB LED

Projects Programming
1

Hi everyone, I have a question, related to rgb led, in my work I need to put two alternating colors, like the police siren, and I do not know how to do it, when I try, it makes a junction of the two, like magenta
Thanks.

2

(deleted)

3

float TempC;
float TempC1;
float TempC2;
int tempPin1=1; //sensor
int tempPin=0; // sensor
int tempPin2=2; //sensor
int Rled=9;
int Bled=10;
int Gled=11;

void setup () {

Serial.begin(9600);

pinMode(Rled,OUTPUT);
pinMode(Bled,OUTPUT);
pinMode(Gled,OUTPUT);}

void loop () {

TempC= analogRead(tempPin);
TempC= ((5.0TempC100.0)/1024.0);

delay (1000);

TempC1= analogRead(tempPin1);
TempC1= ((5.0TempC1100.0)/1024.0);

delay (1000);

TempC2= analogRead(tempPin2);
TempC2= ((5.0TempC2100.0)/1024.0);

delay (1000);

if (TempC>80) {
analogWrite(Rled,255);
analogWrite(Bled,0);
analogWrite(Gled,0);
delay(500);
analogWrite(Rled,0);
analogWrite(Bled,255);
analogWrite(Gled,0);

}

}

4

Is your RGB LED common anode? If so a 0 will turn on a color and 255 will turn it off. So when you think that you are turning on the red LED, you actually are turning on green and blue (cyan).

analogWrite(Rled,255);
  analogWrite(Bled,0);
  analogWrite(Gled,0);
5

is cathodo

6

And with a resistor in each anode?

7

yes

8

Have you tested the LED to turn on all colors one at a time?
Did this work?

9

when I try, it makes a junction of the two, like magenta

Try a bigger delay between the two states. You have half a second at the moment maybe that is too fast for your eyes.