Chinduino 5V Relay module

[dh19440113]

Chinduino 5V Relay module issue

applied 5v through the 3 pin cable relay led lit up and hear the trigger sound. However the screw down connection remain open circuit nothing happened. Closed circuit never occured datasheet unavailible online therefore assume circuit defective.

[jack]

Hi friend;
Connection between port1 and port2 remains open circuit,connection between port1 and port3 remains closed circuit when pinS is in low level.
Port1 and port2 is connected, port1 and port3 is diconnected when pinS is in high level.Please make sure you got the right port.

regards,
Jack

[dh19440113]

I need more clarafication of Pin S, which is not marked on the diagram. Please specify input 1 2 3 as well, which is 5v which is common ground and what is the third pin for.

[dh19440113]

Also when you say low level and high level, do you have a specific voltage and current in mind? At what point is low level and what point is high?

[jack]

In digital logic circuit, low level is specified as 0~0.25V,high level is specified as 3.5~5V. To make it more clear, You can measure the voltage between port1 and port2, port1 and port3 before and after uploading the sketch if you got a multimeter.



pinS->digital pin3

Code: Select all

int Relay = 3;
 
void setup()
{
  pinMode(Relay, OUTPUT);     
}
void loop()
{

          digitalWrite(Relay, HIGH);   
          delay(2000);
          digitalWrite(Relay, LOW);     
          delay(2000);
}