4 relay modules do not work sequentially

Other Hardware General Electronics
1

Hello. I want to manage 4 relay module with arduino mega but it is malfunctioning. The code is below, but before the other relays close, it turns on the others, and after 3 seconds, it closes the other 2. When I use the same code to light the led without any changes, it works perfectly. Can anyone help?

int relay1Pin = 2;
int relay2Pin = 3;
int relay3Pin = 4;
int relay4Pin = 5;

void setup() {
  pinMode(relay1Pin, OUTPUT);
  pinMode(relay2Pin, OUTPUT);
  pinMode(relay3Pin, OUTPUT);
  pinMode(relay4Pin, OUTPUT);
}

void loop() {
  digitalWrite(relay1Pin, HIGH);
  digitalWrite(relay2Pin, HIGH);
  delay(10000);
  digitalWrite(relay1Pin, LOW);
  digitalWrite(relay2Pin, LOW);
  delay(5000);

  digitalWrite(relay3Pin, HIGH);
  digitalWrite(relay4Pin, HIGH);
  delay(10000);

  digitalWrite(relay3Pin, LOW);
  digitalWrite(relay4Pin, LOW);
  delay(5000);
}
2

Always show us a good schematic of your proposed circuit.
Show us a good image of your ‘actual’ wiring.
Give links to components.

3

Hi, @kaandagci
Welcome to the forum.
Thanks for using code tags. :+1: :+1: :+1:

Is your relay module HIGH or LOW input to activate the relays?

Can you please post a link to data/specs of the relay module?

Thanks.. Tom.. :smiley: :+1: :coffee: :australia:

4

Sorry, i have arduino mega and 4 relay module

IMG_1941
IMG_19413024×4032 2.09 MB

IMG_1943
IMG_19433024×4032 2.2 MB

image
image3024×4032 2.64 MB

5

i don't know if my relays are running high or low

6 
int relay1Pin = 2;
int relay2Pin = 3;
int relay3Pin = 4;
int relay4Pin = 5;

void setup() { 
  pinMode(relay1Pin, OUTPUT);
  //digitalWrite(relay1Pin, HIGH);
  pinMode(relay2Pin, OUTPUT);
  //digitalWrite(relay2Pin, HIGH);
  pinMode(relay3Pin, OUTPUT);
  //digitalWrite(relay3Pin, HIGH);
  pinMode(relay4Pin, OUTPUT);
  //digitalWrite(relay4Pin, HIGH);
}

void loop() {
  digitalWrite(relay1Pin, LOW);
  delay(5000);
  
  digitalWrite(relay1Pin, HIGH);
  digitalWrite(relay2Pin, LOW);
  delay(5000);

  digitalWrite(relay2Pin, HIGH);
  digitalWrite(relay3Pin, LOW);
  delay(5000);

  digitalWrite(relay3Pin, HIGH);
  digitalWrite(relay4Pin, LOW);
  delay(5000);

  digitalWrite(relay4Pin, HIGH);  
}
7

Hi @kaandagci could you please share a video of what is happening when you run the code?

And I would recommend this troubleshooting method usually Arduino will limit the amount of current(A) it is supplying through the 5V pin you can try connecting the relays to an external 5V power supply with same shared ground

8

An Arduino is not a power supply.

image
image583×481 96.2 KB

635f55752cf481973acab8917f4e7722bfb1aa7e
635f55752cf481973acab8917f4e7722bfb1aa7e937×861 128 KB

9

I'm uploading the videos to youtube, I'll post them soon

10

i did what you said i had an external power card i tried but it still works the same

11

Show us the wiring connections you tried.

12

14 Haziran 2023 - YouTube //// this is what happens when i upload the code

14 Haziran 2023 - YouTube //// when i try the same code on leds, i get exactly what i want

13
14

Why not try using Arduino Uno and the same jumper cables?
If it works with UNO and the same jumper cables we can have more clarity in solving the issue with the MEGA.....

16

Nano, uno, mega I tried them all, the result is the same, nothing changes…

17

I saw the video and it looks like you are having Acitve-Low relay where the relay activates when you give LOW and deactivates when you give HIGH so..

you can try this code

int relay1Pin = 2;
int relay2Pin = 3;
int relay3Pin = 4;
int relay4Pin = 5;

void setup() {
  pinMode(relay1Pin, OUTPUT);
  pinMode(relay2Pin, OUTPUT);
  pinMode(relay3Pin, OUTPUT);
  pinMode(relay4Pin, OUTPUT);
  digitalWrite(relay1Pin, HIGH);
  digitalWrite(relay2Pin, HIGH);
  digitalWrite(relay3Pin, HIGH);
  digitalWrite(relay4Pin, HIGH);
}

void loop() {
  digitalWrite(relay1Pin, LOW);
  digitalWrite(relay2Pin, LOW);
  delay(10000);
  digitalWrite(relay1Pin, HIGH);
  digitalWrite(relay2Pin, HIGH);
  delay(5000);

  digitalWrite(relay3Pin, LOW);
  digitalWrite(relay4Pin, LOW);
  delay(10000);

  digitalWrite(relay3Pin, HIGH);
  digitalWrite(relay4Pin, HIGH);
  delay(5000);
}
18

Did you try any other 4 Channel relay boards?

19

Yes, tried 3 other board

20

Did you try the code i have posted? and try changing the jumper cables......

21

Thank You! this code solve my problem.