The relay is simply an electrically operated switch i.e. relay has two states and state of the relay depends upon the presence of electrical signal. The relay is usually cuboid shaped and has 5 pins.
WHERE TO USE: The relay is used as a switch between two independent circuits. I.e. one circuit can be used to control the working of another circuit. . We generally use a small current circuit to switch on large current circuits via relay. For example we can use a small battery to switch on an AC 220V supply and this battery circuit is isolated from the AC supply. So we can use relay to switch on any circuit.
HOW TO USE: We first discuss different pins of relay;
The front view of the relay is as follow:
Pin1 and Pin 2: The activating electrical signal is supplied across these pins.
Pin 3: This pin represents the stable state of relay. We can also call this a Normally Closed position i.e. this is the state of the relay when there is no signal.
Pin 4: This pin represents the excited state of the relay. We can also call this a Normally Open position i.e. this is the state of the relay when there is an electrical signal present.
Pin 5: is the Common Pin. This actually is the moving part of the switch.
Suppose we have to use a relay to switch on a bulb on 220V AC using the signal from a small voltage signal. So we connect the different pins of relay as:
HOW IT WORKS:
When there is no voltage difference applied between the pin 1& 2, then the bulb doesn’t glow.
When we apply the voltage difference across the pins 1& 2, the current starts flowing in the coil and the magnetic field is created in the coil. Due to this magnetic field, the moving common part is attracted towards the pin 5. Hence the common pin, pin 5 is disconnected from pin 3 and gets connected to pin 5. Hence 220 V circuit gets completed as one wire is directly connected to the bulb and the other wire is connected through relay. Also note that it doesn’t matter how we connect the voltage signal to the pins 1 & 2 i.e. we only need to create the voltage difference between pins 1 & 2.
USING CURRENT BUFFER TO SWITCH ON RELAY:
When the input signal is weak, it can’t trigger the relay as we require minimum value of current to switch the state of relay. So to amplify the current we use the current buffer IC as shown below:
When the input signal is low, there is no voltage difference across pin1 and 2. Hence bulb doesn’t glow. How ever when the input signal is HIGH, voltage difference is supplied at pin 1 & 2 with amplified current and relay gets switched on, the bulb glows.
Localisez via le logiciel système « Find My Mobile » fourni avec le téléphone ou via un logiciel de localisation de numéro de téléphone mobile tiers.
Thank you for your sharing. I am worried that I lack creative ideas. It is your article that makes me full of hope. Thank you. But, I have a question, can you help me?
Aussie actor Russell Crowe has always worn his heart on his sleeve – sometimes to his detriment – but he has vowed to
reel it in when watching his beloved Souths play NRL
matches from now on.
Crowe became a co-owner of the South Sydney Rabbitohs in 2006, alongside businessman Peter Holmes
à Court, with the aim of revitalising the NRL club that was struggling at the time.
Under his leadership, the Rabbitohs achieved financial stability and secured a premiership victory in 2014, ending
a 43-year drought.
Crowe was instrumental in recruiting star players like
Sam Burgess and Greg Inglis to the team, which significantly improved their performance.
He has often been seen passionately supporting the Rabbitohs at games, with media capturing moments of his animated reactions during key matches.
However the Gladiator star has vowed to show more
of a poker face at future games for one big reason.
Hollywood actor Russell Crowe is a part owner of the South Sydney Rabbitohs and is a constant figure in the stands of
home games
Crowe bought into the club in 2006 and has been a passionate
supporter of the club since he was a child
Crowe, who was instrumental in bringing premiership players like Greg Inglis and Sam Burgess
(pictured) to the club, has vowed to temper his emotions
from now on
‘Nah [losing doesn’t impact my mood]…it is what it is, I can’t affect that outcome
so you sort of just have to accept what’s going
on,’ he told Fitzy & Wippa with Kate Ritchie.
‘A long time ago when I’d be going to Rabbitohs games when my kids were little and stuff, and I realised that by
showing my passion in the grandstands was potentially giving
the media outlets a way of mentally affecting the team.
‘There was all these photos of me strangling the imaginary referee.
‘So, I thought, ‘I’m gonna stop doing that’.
I’d go to a game and see what happens then I’d go backstage and you can swear.
‘But when I’m watching the game, I try and keep my cool…because you
know I think about it from the players’ perspective.
They don’t want to see the boss looking like he’s pissed off in the
Monday newspaper. So you’ve got to be cool about it.’
Souths fans – including Crowe – endured a torrid 2024 season, finishing 16th
with a 7-17 record.
Injuries and suspensions played their part but defensive
frailties were the biggest issue, with the Rabbitohs conceding an average of 28.4 points per
game – their worst since 2006.
The Rabbitohs have gone back to the future by sacking coach Jason Demetriou and re-instating former mentor Wayne Bennett
Souths fans will be hoping to see a fit and firing Latrell
Mitchell back on the park next season
Injuries compounded their struggles, with key players like Campbell Graham missing
the entire season and Latrell Mitchell limited to 11 appearances.
The season’s disappointments led to the dismissal of coach Jason Demetriou, with Wayne Bennett
set to return as head coach in 2025.
Looking ahead to 2025, the Rabbitohs have bolstered their roster by signing English halfback Lewis Dodd, Euan Aitken and Josh Schuster.
The 2025 season kicks off with a match against Bennett’s former club the Dolphins.
Sam BurgessKate RitchieSouth Sydney Rabbitohs
The best day to purchase cheap flights are either on a Tuesday or a Wednesday.
Many airlines publish their promotional fares during
weekdays, especially at the
Read more
Travel & Places
+5
Is the United Kingdom in the Western Hemisphere or in the Eastern Hemisphere?
Asked by Wiki User
Well, sweetheart, the United Kingdom is located in the Western Hemisphere.
So, if you’re looking to party with the Brits, you better head west, not east.
But he
Read more
Travel & Places
What do Mt Ranier Mt Shasta and Mt St Helens have in common?
Asked by Wiki User
Well, isn’t that just a happy little question! Mt. Rainier, Mt.
Shasta, and Mt. St. Helens are all majestic mountains located in the beautiful
Pacific Northwest
Read more
Travel & Places
+2
What does the silk farmer do with cocoons not needed for breeding purpse?
Asked by Wiki User
they kill the silkworm that is inside to get the cocoon into fiber (thread)
id=”firstHeading” class=”firstHeading mw-first-heading”>Search results
Help
English
Tools
Tools
move to sidebar hide
Actions
General