5 Channel Relay Module

 

Materials required-:

  • PCB Board
  • 5V Relays( as per your choice )
  • Resistor (220 ohm , 1k) 
  • Led  (equal to number of relays used)
  • Transistor (BC547)
  • 3 Pin Screw terminal
  • Male header pins or Female header pins
  • Diode (IN4007)  


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How it works ?

First of all, before knowing that how relay module works you have to know that how relay works

A relay is the device that open or closes the contacts to cause the operation of the other electric control

Every electromechanical relay consists of 

  • Electromagnet
  • Mechanically movable contact
  • Switching points and 
  • Spring  

We can control high voltages device using relays .A Relay is actually a switch which is electrically operated by an electromagnet . The electromagnet can be  activated with a low voltage , for example we can say that using a 5volts from a microcontroller and it pulls a contact to make or break a high voltage circuit.



As an example for this electronics project ,I am using   5volts relay with the rating of 7A@250 and 125V AC and 7A @30 and 28VDC but I recommend you to use 10A . The high voltage output connector has 3 pins, the middle one is the common pin and  one of the two other pins is for normally open connection and the other one for normally closed connection. On the other side of the relay we have 2  pins for triggering purpose. 


A relay module is basically a combination of various electronic components such as relay , transistor, resistor, led transistor , header pins etc. What we all have to do is to trig the low voltage side of relay so that it can perform its task. Here, I did that by using  header pins so that I can trig them with 'Arduino'. 


   

Circuit Diagram-:


I know in the circuit I have used 6 relays but that's because I have made that earlier and You can use as much as relays you want this is all up to you.    

If you want me to make a post on "How to make Arduino Board" and "House Automation System"
just let me know in  the comment section.
 


For any queries contact me on  -:tombriddle28@gmail.com

YouTube Channel-: Omnific{If this post helps you please do subscribe my               

            YouTube channel too ,It's only a click for you but it means a lot to me.}

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