next topic »

[on:]

I need Help :- I am working on project of Infrared Remote control for controlling 2 relay Board. I am using TV Tuner Cards remote for Controlling the Relay , I have done all things like Extracting raw code for Remote Controller, coding the ARDUINO UNO , wiring the sensor on breadboard and tested project for working,   it's working but the problem is when i shutdown the arduino and restart it's power the two relays goes ON automatically when i press specific key on Remote Controller it's toggles ON / OFF as expected but when reboot or Cold start ';; the relay get ON automatic.. Please tell why this getting happened. Below is the Code i am using .

//---------------------------------------CODE FROM HERE -----------------------------------------------------------------------------------------------

#include <IRremote.h>

int RECV_PIN = 11;
int relay1 = 2;
int relay2 = 3;
int relay3 = 4;
int relay4 = 5;

int on = 1;
int on1 = 0;
int on2 = 0;
int on3 = 0;

IRrecv irrecv(RECV_PIN);
decode_results results;

void setup()
{
  pinMode(relay4, OUTPUT);
  pinMode(relay3, OUTPUT);
  pinMode(relay2, OUTPUT);
  pinMode(relay1, OUTPUT);
  pinMode(13, OUTPUT);
  irrecv.enableIRIn(); // Start the receiver
}

unsigned long last = millis();

void loop() {
  if (irrecv.decode(&results))
  {
    if (results.value == 0x61D648B7)
    { // Remote Control Power Code
      // If it's been at least 1/4 second since the last
      // IR received, toggle the relay
      if (millis() - last > 250)
      {
        on = !on;
        digitalWrite(relay1, on ? HIGH : LOW);
      }
      last = millis();
    }   

 else if (results.value == 0x61D638C7)
    {
      if (millis() - last > 250)
      {
        on1 = !on1;
        digitalWrite(relay1, on1 ? HIGH : LOW);
      }
      last = millis();
    }


    else if (results.value == 0x40BD28D7 )
    {
      if (millis() - last > 250)
      {
        on2 = !on2;
        digitalWrite(relay1, on2 ? HIGH : LOW);
      }
      last = millis();
}

 else if (results.value == 0x61D6609F)
    {
      if (millis() - last > 250)
      {
        on3 = !on3;
        digitalWrite(relay4, on3 ? HIGH : LOW);
      }
      last = millis();

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

//---------------------------------------------------CODE END ---------------------------------------------------------------------

[Reply #1 on:]

Please read the how to use this forum post and add code tags to this post.

We need to know how you have wired up the relays.

[Reply #2 on:]

i am using this 2 relay board with my project.


https://www.box.com/s/lp8u6f319cmlmhzr5sje

[Reply #3 on:]

how to attach images in reply ???

[Reply #4 on:]

Please read the how to use this forum post and add code tags to this post.

Oddly enough it tells you about attaching images as well.

[Reply #5 on:]

My guess is you are using active LOW relays. That means they are on when you output a LOW and off when you output a HIGH. Try adding

Code:

digitalWrite(relayX, HIGH);

before every

Code:

pinMode(relayX, OUTPUT);

line in setup().

[Reply #6 on:]

I Need help in another project : i am using LDR and arduino uno and 2 relay module when LDR detects low light it trigger the relay my problem is when slight change in LDR value the relay gets flickering like fast on/ off how to get steady on or steady off ?? the relay module pin is connected to pin 12 on arduino uno...  i am using the code below ..

--------------------------------------------------------------------------------------------------------------------------
void setup() {
pinMode(4, OUTPUT);
pinMode(12, OUTPUT);
//Serial.begin(9600);
}

void loop(){
digitalWrite(4, HIGH);
if(analogRead(0) < 600){
digitalWrite(12, LOW);
} else{
digitalWrite(12, HIGH);
//Serial.println(analogRead(0));
}
}
-----------------------------------------------------------------------------------------------------------------------

[Reply #7 on:]

I Need help in another project

So you still haven't read the sticky. Let me help here is the link
http://arduino.cc/forum/index.php/topic,149037.0.html

Anyway if you don't post the code correctly next time this is the last help you get from me because you are showing a great discurtsy to the board by ignoring our simple requests.

my problem is when slight change in LDR value the relay gets flickering like fast on/ off

You will do when the value is around the threshold mark of 600. You can get round this in code by introducing a hysteresis, that is a different threshold for the turn on to the turn off. You need a variable to see what state you are currently in and then compare it with say 600 if it is on or 620 if it is off.

[Reply #8 on:]

hi i am very sorry for broking the rules but i am new to this forum and i tried to get help from forum help pages but when i first log-in to this forum from that time the help page is not showing and only says " DUDE, WE ARE POPULATING OUR HELP SERVER "  and   "come back in a minute we will be done, for sure!. "   now tell me what can i do ? if any other help page is there please tell me ..

[Reply #9 on:]

Well, there's this one, and the ones it links to, but you know that because you've just reported it to the moderators.

Why didn't you read it instead?

[Reply #10 on:]

ok i now get the access when i clicked on that image of forum ok thanks.

[Reply #11 on:]

Hi, gapan You given perfect answer that line of code ,

Code:

digitalWrite(relay1, HIGH);

actually worked for me thanks and my problem solved ..Bye.