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Chinduino 5V Relay module
Posted: Wed Apr 18, 2012 1:53 pm
by 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.
Re: Chinduino 5V Relay module
Posted: Wed Apr 18, 2012 3:24 pm
by 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
Re: Chinduino 5V Relay module
Posted: Thu Apr 19, 2012 12:25 pm
by 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.
Re: Chinduino 5V Relay module
Posted: Thu Apr 19, 2012 12:28 pm
by 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?
Re: Chinduino 5V Relay module
Posted: Thu Apr 19, 2012 6:11 pm
by 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);
}