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mishmalik

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want to connect my Arduino UNO
« on: July 11, 2017, 05:07:13 AM »
Hello !

I want to connect my Arduino UNO to a One Relay Switch Board.
I also want to connect relay to a Fan, TubeLight etc

Relay connections :  POLE, NO, NC,

Please can any one explain me the connections Please.

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want to connect my Arduino UNO
« on: July 11, 2017, 05:07:13 AM »

AJ_36

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Re: want to connect my Arduino UNO
« Reply #1 on: December 06, 2018, 08:55:13 AM »
Hello !

I want to connect my Arduino UNO to a One Relay Switch Board.
I also want to connect relay to a Fan, TubeLight etc

Relay connections :  POLE, NO, NC,

Please can any one explain me the connections Please.


Hi,

It is very easy to connect a relay to Arduino or any micro-controller for that matter. Since you have mentioned "Relay board" I am assume it has the relay driver circuit build on it.

If you can find a transistor, resistor and diode on top of your board then it probably has the driver circuit. If not make sure you add one else your Arduino will not be able to provide enough current for your Relay to trigger.

There are many types of relays the one you have is possibly a 5V 5-pin relay. You should connect the load, in your case light fan etc to the  POLE, NO, NC (any two) pins. Also note that pole pin is commonly refereed to as common pin also. You can find more details of the relay in the below link.
 https://components101.com/5v-relay-pinout-working-datasheet

You AC loads will have two terminals Phase(live or hot) and neutral. Connect the Phase wire to the Phase of your AC mains. You will add the switch (relay) only to the neutral side. Connect the neutral wire to the pole pin of your relay and then connect the NO pin of the relay to the Phase.

This way your load will be turned off till the relay gets triggered. When the relay is triggered form the Arduino, the neutral will be connected to the AC main completing the circuit and thus turning on the load.

I know its a very late reply, but hope it would help people to come in future.


 

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