5 Pin Relay Connection Diagram. On the switched circuit side of the module, you'll see the three switched connection points marked with the diagram shown below (the labels NO, Common, and NC. The output voltage on this pin is what triggers the relay.
An AC bulb is used for demonstration.
On the switched circuit side of the module, you'll see the three switched connection points marked with the diagram shown below (the labels NO, Common, and NC.
If connected to NO the load remains disconnected before trigger. Use an ohmmeter to find the pins with continuity, and some resistance that will indicate that you have found the coil that is the electromagnet to activate the relay. once you have found those two pins Google the part number plus the word "datasheet". This single relay module can be used in interactive projects.








