8 Pin Relay Base Wiring Diagram. Devices , you can use any device or appliance as your output. NC = Normally closed NO = Normally open.
Relays (ac/dc) by NTE - 140001 (Don Howell)
NC = Normally closed NO = Normally open. PNP relay switch circuit requires different polarities of operating voltages. Controlling a relay module with the Arduino is as simple as controlling any other output as we'll see later on.
PNP relay switch circuit requires different polarities of operating voltages.
Relay switch pin diagram is a good place to start if you are looking to learn more.
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Relays are most commonly used switching device in electronics. Then I carefully cut the cable and cut one of the wires as shown in the picture below and connect them to the normally open connection pins of the relay module. Identify the hot power wire (red wire in the diagram above) in the cord leading to the light bulb and make a cut.