Quick question about relay programming

Projects Programming
1

Hello!

New to this and had an question.

Im trying to turn on one relay from my four relay boad.

This does not work:

#define RELAY1 8

void setup(){

pinMode(RELAY1, OUTPUT);

}

void loop(){

digitalWrite(RELAY1,LOW); // Turns ON Relays 1
delay(2000); // Wait 2 seconds
digitalWrite(RELAY1,HIGH); // Turns Relay Off

}

But this works..'

#define RELAY1 6
#define RELAY2 7
#define RELAY3 8
#define RELAY4 9

void setup()

{

pinMode(RELAY1, OUTPUT);
pinMode(RELAY2, OUTPUT);
pinMode(RELAY3, OUTPUT);
pinMode(RELAY4, OUTPUT);

}
void loop()

{
digitalWrite(RELAY1,LOW);
delay(2000);
digitalWrite(RELAY1,HIGH);

digitalWrite(RELAY2,LOW);
delay(2000);
digitalWrite(RELAY2,HIGH);

digitalWrite(RELAY3,LOW);
delay(2000);
digitalWrite(RELAY3,HIGH);

digitalWrite(RELAY4,LOW);
delay(2000);
digitalWrite(RELAY4,HIGH);

}

What am i doing wrong?

Thanks in advance!

2

Which pin is relay 1 connected to ?

3

This does not work:

Sure it does. The relay is turned on for two seconds, off for a few nanoseconds, and then back on. (Or it might be off for most of the time and on for a few nanoseconds).

Isn't that what you want? If not, why did you write the code that way?

(Perhaps you wanted to delay() for longer at the end of loop()).

4

haha alrighty, thats the issue PailS. on for nanosec then off for 2 hehe thanks!

Realy awsome forum since there seem to be so many active members.

Thanks for your answer bob but its solved now! :slight_smile: