what is relay ? | how relay works ?

-

What is relay ? | how relay works ?

 

HELLO FRIENDS.

 

Relay

 

A relay is an electrically operated switch. Relays use an electro magnet to operate a switching mechanism mechanically .

Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits)

 

You can see the schematic diagram of a relay and an image of a real relay below.

 



NC—Normally Closed,

NO—Normally Open.

A   and  B  should be connected to battery or a DC source.

 

NO  NC  & COMMON, is a switch (SPDT).

A & B  are the two terminal of coil (which is used as electro-magnet).

When supply is given to A & B coil works as magnet and pull the shaft to switch (NC to OPEN, & NO to CLOSE) as switch do.

Relay comes in variety of ratings and sizes, Generally a 5volt relay, 240VAC/ 7Amp is enough for a hobbyist. As it can drive almost all home appliances.

 

Relays are also used for sensing purposes.

For ex:- buchholz relay, for fault detection in power transformers.

 

Hey it’s  TECH BECK.


PLEASE SUBSCRIBE US ON YOUTUBE:-

https://www.youtube.com/channel/UCbpM--NrLZAcb6WpUAw74OA/featured?view_as=subscriber

 

For Business enquiries:-

Email:- techbeck14@gmail.com

 

FOLLOW US:-

INSTAGRAM:- https://www.instagram.com/techbeck14/

FACEBOOK:- https://www.facebook.com/TECH-BECK-101050225009186/?modal=admin_todo_tour

 

BACK TO TECH.

 

THANK YOU

 

 


Comments

Post a Comment

Popular posts from this blog

INTRODUCTION TO THIS CHANNEL

-
Image
HELLO FRIENDS.   Welcome to this channel, on this channel you will see ALL ABOUT TECHNOLOY, EDUCATION, CONCEPTS, INNOVATION, UNBOXING, EXPERIMENT etc. Hey it’s   TECH BECK. PLEASE SUBSCRIBE US ON YOUTUBE :- https://www.youtube.com/channel/UCbpM--NrLZAcb6WpUAw74OA/featured?view_as=subscriber   For Business enquiries:- Email:- techbeck14@gmail.com   FOLLOW US:- INSTAGRAM:- https://www.instagram.com/techbeck14/ FACEBOOK:- https://www.facebook.com/TECH-BECK-101050225009186/?modal=admin_todo_tour   BACK TO TECH.   J THANK YOU J     CLICK ABOVE TO WATCH VIDEO
Read more

What is RGB LED? | how it works?

-
Image
  What is RGB LED? | how it works?   HELLO FRIENDS.   RGB LED   An RGB LED, as name suggests is a special LED which is capable of producing all colors by mixing Red, Green and Blue colors . In simple words It consists of 3 LEDs (Red, Green, Blue) together in a package and by variation of these 3 colors more colors can be formed.   An RGB LED is having 4 pins, one of which is a common anode and other 3 pins are for Red, Green and Blue respectively. Or common cathode and other 3 pins are Red, Green, Blue.   So, to distinguish between common cathode and common anode RGB LEDs: Use a multimeter in continuity mode. If the LED lights up with the red tip on the longest lead and the black on one of the other leads – you have a common anode RGB LED If the LED lights up with the black tip on the longest lead and the red tip on one of the other leads – you have a common cathode RGB LED.   By manufactur...
Read more

what is reed switch? | how reed switch works?

-
Image
  What is reed switch? | how reed switch works? HELLO FRIENDS.   Reed Switch   The reed switch is an electrical switch operated by an applied magnetic field .   CONSTRUCTION:- It consists of a pair of ferromagnetic contacts on iron metal reeds in a sealed glass envelope. When a magnet comes near to this switch, it magnetize the iron reeds and come together to make a contact. This temporary contact works as a switch. The moment magnet moves away, the switch turns Off and contacts are separated.   SYMBOL   Hey it’s   TECH BECK. PLEASE SUBSCRIBE US ON YOUTUBE :- https://www.youtube.com/channel/UCbpM--NrLZAcb6WpUAw74OA/featured?view_as=subscriber   For Business enquiries:- Email:- techbeck14@gmail.com   FOLLOW US:- INSTAGRAM:- https://www.instagram.com/techbeck14/ FACEBOOK:- https://www.facebook.com/TECH-BECK-101050225009186/?modal=admin_todo_tour   BACK TO TECH.   THANK YOU ...
Read more