I'm glad you explained it with a diagram. I've always been confused as to what the functional difference between a relay and a transistor is and this explained it all. Thanks for posting.
Awesome video! Very good drawing of the inner workings of the relay and great detailed explanation of what's actually happening when you apply power. Thanks for the lesson!
Great video! Where you drew and explained the SPDT relay was the best explaniation I've seen yet and the moment I finally understood relays... Thankyou!
We just got into relays in my electronics class and I had such a hard time trying to figure out the technical data sheet for my specific relay. Thank you for explaining it barney style!
Great presentation and very clear explanation of Relays that many people do not understand the function and work. This video saves their lives by making the Relay finally understand from the concept to the application. Thank you very much.
Thanks Bud! I am installing a relay for a light bar I’m adding to my truck. I don’t like using things if I don’t completely know what they are and how they work. I’m now going to scroll through to see if you have any videos on different applications relays are good for. Thanks for teaching!! Brett Lovell
Thank you so much for putting so much of efforts to explain this simple yet important concept! I was looking to understand the working in lot of places! This is crystal clear! Thank you Sir! You rock!
This is a great explanation video, hard to imagine how it could be improved, maybe a couple of examples of basic circuits that use relays, but as for how they work this nails it.
thanks mate you explained it better than the guy at the electronics store if i followed his instructions i would have prob blown the battery up or burnt my house down, you sorted it all out for me thanks
Not so!!! The instructor failed to mention how a relay would act if the points get carbon on them. How to know if the relay is actually bad and what it is used for. Any two year old could explain how a simple switch works.
@@elenaolivares6965 What is a relay used for then? I think it has A LOT of different uses, there would need to be a whole separate video just to have time for it all i would imagine.
@@elenaolivares6965 "How Does A Relay Work' I think he covered the title. Could do a several hour video or a series to cover all the different uses, what could go wrong, how to detect a bad relay & so on. Sometimes we have to do a little research to find exactly what we are looking for. Stay safe, Joe Z
One of the most helpful electronics videos I've ever seen, thankyou. On my college course, I've moved onto much more complex electronics, but have never been able to fully grasp the idea of a relay, until now. So thakyou :)
Thanks for the demo and sharing your expertise on the subject matter! I just need to confirm an assumption that I made: on the coils side, you apply the 12vdc on one end of the coil, but what goes to the other end of the coil? I assumed, it’s the ground. Please advise. Thanks again.
I would like to activate on a 18 hole green a light and a bell (at the green) running a wire to club house to notify cashier. After being notified cashier should have a momentum switch to cut buzzers. And buzzer should be ready to buzz for next golf ball. (All of the above is on a miniature golf) Enjoyed to watch your videos and your help would be greatly appreciated .
Great video thanks for the info, just a question I’m trying to control a swamp cooler from my thermostat using relays as bridge, my thermostat will send a 24v signal to activate the coil and complete the path that way my 110v signal from the swamp will travel to active the command ( get fan on, high cool, low cool) the questions is what type of relays can i use that receive 24 to control the coil that way 110v can pass through?
Very well done video! Those NTE relays are very good...mine is always on @ 8.5A (120VAC) unless grid is down...then switches to inverter. This relay has been running for over 7 years with no issues. I tried other brands that said 10A but never held over 4A without burning up.
Way before i knew these existed, I wondered if permanent magnets themselves, when coupled with an electrical conductor, could serve a triple function of switch, wire & spring in a toggle. So that puts me right up there with Michael Faraday…s neighbors Dalmatian.
Great video HOWEVER you did forget to further explain how a DPST although you mentioned it at the end of the video. GREAT VIDEO! You really broke down and simplified how Relays work and their overall properties and characteristics 😊👍
Good Explanation Sir. But how to power up the coil is missing. What calculations we have to consider or calculate to avoid over driving coil. How do we come to know how much current the coil can with stand ?
very helpful. when i have a 12dc relay for example ,and the terminals are A1 A2, which sdie is the plus and which is the minus. and what will happen if it is not properly connected?
Hi ser.. i want to know what is the difference then of using single throw and double throw..i mean what is their specific function and uses. And which is more efficient to chose between the two. Many Thanks
A SPST (single pole single throw), is just a single switch with two contact points that is on or off. A SPDT (single pole double throw), is single switch but with three contact points. One point will be normally open (n.o.), while the other will be normally closed (n.c.), and when you switch this relay, those two points will switch from n.c. to n.o, and n.o. to n.c. One is not more efficient than another. It just depends on what type of switching you need in your circuit.
Thanks¡¡ awesome video simple perfectly explained and really heplful, so if i don't supply enough voltage the relay won't move inside? i mean i couldn't make it work a 12v relay with a 5v supply right now i'm having troubles trying to find a "5v dpdt relay" i was wondering if connect 2 spdt relays "in parallel", could work as a dpdt relay? i'll really apreciate your answer
Very clear thank you. I do have a question though. Is it safe to use a relay in reverse? So say you have two inputs such as mains and a generator for example. Could you use the relay to switch between the seperate inputs independently?
I've got an aftermarket backup camera mounted on my plates. But I also have very bright license plate lights that outshine the camera at night. Would a relay work to cut the plate lights while my camera runs?
Hi can you help me I’ve got a 12v heater that needs to go through a cooling down sequence which need the power to stay on I can run through the main with a reducer down to 12v but if I get a power cut it will burn the heater out so I need to switch over to a 12v battery to keep it powered to go through the cooling down sequence is there any auto switch I can do this with please hopefully a cheap relay that you was showing Kind regards John
Did I miss it but did he explain WHY you need to use a relay? I simply came here wanting to know WHY you need to use a relay. I have fog lights for my van and everyone says I need a relay. So I’m just trying to better understand WHY I need a relay. What is it’s PURPOSE.
Relay is a switch that uses electricity to work, it can handle huge amps which is you need when you install extra lights.. while flip switch/push button switch etc can only handle small current.. so if you direct your huge current load into a switch without relay, most likely the switch will be busted.. sooner or later.
A relay is simply a way to control devices/parts that require higher voltages to operate while keeping the actual interface or computer isolated from that hotter current.
87A is normally open and 87 is Normally closed if you dont believe me then see the diagram on the relay. CONTACT Pin would be on the 87A and nothing would be shown for 87 i am talking about the Bosch style relay (5 pin) Rest of what you said are absolutely correct.
+John Fernandes The NORMAL state is referring to when the relay is NOT engergized, and in this state, put a multimeter on PIN 30 and PIN 87A, and you will see it's closed = normally closed
Hi, and thank you for your detailed explanation. (With a SPDT auto relay, JD2912-1Z-12VDC.) Does the coil and switch have to share the same power source (battery), or can they have different power sources?
Very clear explanation. I am interested in Power System Control and Protection and will like to have a broader understanding on relays. Do you offer training for that as well?
I wonder where I can find a video with this type of relay single pole double throw acting as an LED corner light rapid flasher fix. This is a very informative video, thank you for taking the time to upload this.
thank you so much for making video explanation like this.. I am a slow learner in things like this and watching it multiples times makes me understand what a relay is.. In school you got one shot to learn every shit they teach you just saying LOL...
Hi, can you help me with a question for an essay I have to write at my college. The question/scenario is: You need to create a remote on/off switch for the amplifiers on stage while doing an installation of a sound system at the local club. The amplifiers must be switched on and off from the mixer position, without running thick power cables next to the audio cables between the stage and Front Of House. Explain the specifications for the relay switch to be used, the connections to this relay switch and the PSU to control the relay. Remember that we do not want to add any additional EMI noise to the sound.
This is by far the most useful explanation of a relay I've seen on TH-cam. Thank you
I'm glad you explained it with a diagram. I've always been confused as to what the functional difference between a relay and a transistor is and this explained it all. Thanks for posting.
Thanks for your comment!
Awesome video!
Very good drawing of the inner workings of the relay and great detailed explanation of what's actually happening when you apply power.
Thanks for the lesson!
GrifFungin Really appreciate your comment!
5 years later after my apprenticeship im watching this video. Great explanation!
Great video! Where you drew and explained the SPDT relay was the best explaniation I've seen yet and the moment I finally understood relays... Thankyou!
You did an outstanding job of explaining these concepts. Thank you.
Dude, that has been the best example of a relay I have seen yet. Thank you
Thanks for your comment!
We just got into relays in my electronics class and I had such a hard time trying to figure out the technical data sheet for my specific relay. Thank you for explaining it barney style!
+Ian Hermoso Glad the video was helpful!
Great presentation and very clear explanation of Relays that many people do not understand the function and work. This video saves their lives by making the Relay finally understand from the concept to the application. Thank you very much.
Thanks for your comment!
Thanks Bud! I am installing a relay for a light bar I’m adding to my truck. I don’t like using things if I don’t completely know what they are and how they work. I’m now going to scroll through to see if you have any videos on different applications relays are good for. Thanks for teaching!! Brett Lovell
Thanks for your comment!
That is the way you are supposed to explain a relay most folks don't know how to explain a relay
Thank you so much for putting so much of efforts to explain this simple yet important concept! I was looking to understand the working in lot of places! This is crystal clear! Thank you Sir! You rock!
+k Thanks for your comment!
This helped a lot. I had the general idea, but this cleared up the common, NO, NC parts. Also wasn't sure what the DPDT meant. Thanks for sharing.
Best relay video on TH-cam.
Thank you for explaining relays simple and straight forward
This is a great explanation video, hard to imagine how it could be improved, maybe a couple of examples of basic circuits that use relays, but as for how they work this nails it.
Clear and explanative video. Beginners and dafts approved!👍
Good teacher, very thorough and clear. Much respect.
thanks mate you explained it better than the guy at the electronics store if i followed his instructions i would have prob blown the battery up or burnt my house down, you sorted it all out for me thanks
Cool, thanks for your comment!
Complete and careful with viewers making sure that everyone understand ... Salut you
Very clear explanation, thank you
Not so!!! The instructor failed to mention how a relay would act if the points get carbon on them. How to know if the relay is actually bad and what it is used for. Any two year old could explain how a simple switch works.
@@elenaolivares6965 What is a relay used for then? I think it has A LOT of different uses, there would need to be a whole separate video just to have time for it all i would imagine.
8
@@elenaolivares6965 "How Does A Relay Work' I think he covered the title. Could do a several hour video or a series to cover all the different uses, what could go wrong, how to detect a bad relay & so on. Sometimes we have to do a little research to find exactly what we are looking for. Stay safe, Joe Z
Thanks really helped me understand for my auto electrical class
One of the most helpful electronics videos I've ever seen, thankyou. On my college course, I've moved onto much more complex electronics, but have never been able to fully grasp the idea of a relay, until now. So thakyou :)
So for you, the likes of multivibrator, Schmitt trigger are easier to understand than a relay, right ?
Thanks. You're the best teacher Sir
Thanks for the demo and sharing your expertise on the subject matter! I just need to confirm an assumption that I made: on the coils side, you apply the 12vdc on one end of the coil, but what goes to the other end of the coil? I assumed, it’s the ground. Please advise. Thanks again.
Thank you for the professional video quality. Nothing more frustrating then choppy bouncy bounce non edited cuts.
+Armando Montour Appreciate your comment. Cheers!
So nice
I would like to activate on a 18 hole green a light and a bell (at the green) running a wire to club house to notify cashier.
After being notified cashier should have a momentum switch to cut buzzers.
And buzzer should be ready to buzz for next golf ball.
(All of the above is on a miniature golf)
Enjoyed to watch your videos and your help would be greatly appreciated .
Great video thanks for the info, just a question I’m trying to control a swamp cooler from my thermostat using relays as bridge, my thermostat will send a 24v signal to activate the coil and complete the path that way my 110v signal from the swamp will travel to active the command ( get fan on, high cool, low cool) the questions is what type of relays can i use that receive 24 to control the coil that way 110v can pass through?
Thank you for sharing your knowledge with others sir. You explained the concept of relays in a magnificent way.
Very educative thanks for the lecture Sir God bless you abundantly
Awesome! Thanks for this! Everything I was trying to figure out was laid out perfectly in this video.
Nice tutorial specialy to the begginer
Easy to understand with visual cues.
very good instruction in detail. I learned this before but this really brought everything back and more. Thanks!
You are a good teacher
Thank you for your video. It is really easy to understand. Now I know about relays thanks to you.
Glad my video was helpful. Thanks for your comment!
Very well done video!
Those NTE relays are very good...mine is always on @ 8.5A (120VAC) unless grid is down...then switches to inverter.
This relay has been running for over 7 years with no issues.
I tried other brands that said 10A but never held over 4A without burning up.
Thanks for your comment!
awesome tutorial for a bit of an electronics newbie, thank you
Thanks for your comment!
thank you very much, your explanation is very clear. i have learnt something i all the time was wondering what is relay.
Thank you for a very clear explanation video
Great video
You explain it very clearly thanks
Way before i knew these existed, I wondered if permanent magnets themselves, when coupled with an electrical conductor, could serve a triple function of switch, wire & spring in a toggle.
So that puts me right up there with Michael Faraday…s neighbors Dalmatian.
great video and awesome step by step detail explanation
Thank you for your comment!
I think you can be a good teacher I will like to lean more from your site thnx good stuff
Well, thank you very much for your comment!!
Great video HOWEVER you did forget to further explain how a DPST although you mentioned it at the end of the video. GREAT VIDEO! You really broke down and simplified how Relays work and their overall properties and characteristics 😊👍
Awesome video. Perfectly explained 💯
this is one of the best presentation i have seen, please keep them coming
Good Explanation Sir. But how to power up the coil is missing. What calculations we have to consider or calculate to avoid over driving coil. How do we come to know how much current the coil can with stand ?
Really good simple and basic explanation!
very helpful. when i have a 12dc relay for example ,and the terminals are A1 A2, which sdie is the plus and which is the minus. and what will happen if it is not properly connected?
Hi ser.. i want to know what is the difference then of using single throw and double throw..i mean what is their specific function and uses. And which is more efficient to chose between the two. Many Thanks
A SPST (single pole single throw), is just a single switch with two contact points that is on or off. A SPDT (single pole double throw), is single switch but with three contact points. One point will be normally open (n.o.), while the other will be normally closed (n.c.), and when you switch this relay, those two points will switch from n.c. to n.o, and n.o. to n.c. One is not more efficient than another. It just depends on what type of switching you need in your circuit.
Thanks¡¡ awesome video simple perfectly explained and really heplful, so if i don't supply enough voltage the relay won't move inside? i mean i couldn't make it work a 12v relay with a 5v supply right
now i'm having troubles trying to find a "5v dpdt relay" i was wondering if connect 2 spdt relays "in parallel", could work as a dpdt relay? i'll really apreciate your answer
Yes a 12v relay needs a 12v power source to energize. Try eBay for those relays. But you can use 2 SPST if you want, just more wiring.
great explanation man! i understood in one go
This video is seriously very good. Thank you.
Thanks for your comment!
Hi my friend son many thanks , it was useful for me
Very very helpful! Thank you very much!
Very clear thank you. I do have a question though. Is it safe to use a relay in reverse? So say you have two inputs such as mains and a generator for example. Could you use the relay to switch between the seperate inputs independently?
For that type of application, current rating is very important. You should use a proper transfer switch when switching.
Nice explanation sir
Thank you...nice tutorials 🙂👌
Excellent way to explain relays!
Thanks for a clear explanation
Hoping you make also for motor control pump combining with a diesel,jokey and induction motor pumps using this relays for connections.
Thank you good sir. You made me smarter today. :)
Awesome video, bro. Earned a like, and subscription
Excellent explanation.
Very informative and easy to understand. Thank you
Now it makes sense. Thank you
I've got an aftermarket backup camera mounted on my plates. But I also have very bright license plate lights that outshine the camera at night. Would a relay work to cut the plate lights while my camera runs?
Fantastic video sir!
Very well done. Thank you.
Great Explanation!
this help so much ur a god
With the SPDT relays, how do you separate the single coil electromagnet from both pole switches so they are not shorting out or sharing?
Great explanation!!
thanks for your sharing . very clear.
Hi can you help me I’ve got a 12v heater that needs to go through a cooling down sequence which need the power to stay on I can run through the main with a reducer down to 12v but if I get a power cut it will burn the heater out so I need to switch over to a 12v battery to keep it powered to go through the cooling down sequence is there any auto switch I can do this with please hopefully a cheap relay that you was showing
Kind regards John
Thank you for the great explanation and the video. It helped me understand relays much better.
+CrpMag Glad my video helped!
Did I miss it but did he explain WHY you need to use a relay? I simply came here wanting to know WHY you need to use a relay. I have fog lights for my van and everyone says I need a relay. So I’m just trying to better understand WHY I need a relay. What is it’s PURPOSE.
Relay is a switch that uses electricity to work, it can handle huge amps which is you need when you install extra lights.. while flip switch/push button switch etc can only handle small current.. so if you direct your huge current load into a switch without relay, most likely the switch will be busted.. sooner or later.
How are you going to turn the fog lights off. A relay is a switch is pretty much what it is to be able to automatically turn something on and off
A relay is simply a way to control devices/parts that require higher voltages to operate while keeping the actual interface or computer isolated from that hotter current.
@@dilldowschwagginz2674 there not just for high voltages there also for 24 volts dc as well
87A is normally open and
87 is Normally closed
if you dont believe me then see the diagram on the relay. CONTACT Pin would be on the 87A and nothing would be shown for 87
i am talking about the Bosch style relay (5 pin)
Rest of what you said are absolutely correct.
+John Fernandes The NORMAL state is referring to when the relay is NOT engergized, and in this state, put a multimeter on PIN 30 and PIN 87A, and you will see it's closed = normally closed
Thanks! I finally got to understand different types of relays. Very helpful.
Very professional instruction. Thankyou
Great video, very useful info.
I did found this video helpful!💡
Thank you Sir!
Hi, and thank you for your detailed explanation. (With a SPDT auto relay, JD2912-1Z-12VDC.) Does the coil and switch have to share the same power source (battery), or can they have different power sources?
The coil and switch can use the same power source, or use different power source. The two are independent.
That's what I believed when I bought them, but testing didn't reflect that. I must have had bad connection or something. :) That you.
Wow! Thank you for your very very good tutorial about relays, its very clear to me now on how to apply it DIY... It is also like a mosfet .
cant be clearer, thanks for the video, going to the solid-state lesson now
Very clear explanation. I am interested in Power System Control and Protection and will like to have a broader understanding on relays. Do you offer training for that as well?
Very good 🙏🙏🙏🙏. Thanks
I wonder where I can find a video with this type of relay single pole double throw acting as an LED corner light rapid flasher fix. This is a very informative video, thank you for taking the time to upload this.
thank you so much for making video explanation like this.. I am a slow learner in things like this
and watching it multiples times makes me understand what a relay is..
In school you got one shot to learn every shit they teach you just saying LOL...
Awesome video! Thanks
Hi, can you help me with a question for an essay I have to write at my college. The question/scenario is:
You need to create a remote on/off switch for the amplifiers on stage while doing an installation of a sound system at the local club. The amplifiers must be switched on and off from the mixer position, without running thick power cables next to the audio cables between the stage and Front Of House. Explain the specifications for the relay switch to be used, the connections to this relay switch and the PSU to control the relay. Remember that we do not want to add any additional EMI noise to the sound.
Nice job. Now I get how it is working!!!
it helps me alot,thanks
Very clear and detailed, super helpful video! Thank you
Thank you for the video. it is very informative
Thanks for your comment!
Wonderful. very clear.
good
Great video, wonderful explanation and demo.