The Relay
How does a simple relay help us understand electricity and circuits? In this episode of Science LIVE, Roger Billings breaks down the science behind the relay—the clever electromagnetic switch that makes it possible to control circuits with precision. Learn how relays work, why they’re essential in everyday electronics, and how this simple idea became a building block for modern technology. A clear, hands-on look at one of engineering’s most important tools.
About DrB
Dr. Roger Billings is a visionary innovator whose work has touched the lives of millions of students and transformed the landscape of education. Widely known as “DrB” to the countless kids who benefit from his groundbreaking Acellus learning system, Dr. Billings has dedicated his life to advancing education through technology.
As part of DrB’s lifelong commitment to supporting education, Science LIVE was launched as a way to “give back” by mentoring students in conjunction with the Roger Billings Scholarship Program.
Read more about DrB »
About the Roger Billings Scholarship Program »
Whoa i didnt know that about WD40!
so WD40 good for something lol!!
I can make radio waves myself?!
I don’t think r 51 should drink liquids
I love r51
This is so neat!
Hopefully we can visit acellus world one day!
This is so interesting.
Wow!! That is so cool
It was fun
R 51 is hilarious!
Circuits are so fun!
wow!! that’s so cool
this is extremely helpful!!
electrical currents are so cool!
That woes cool😎
wow I learned so much
R51 is so entertaining !
I love these videos
I have seen it before where they were able to use a potato to complete a relay and generate electricity.
Yes, I think R5 1ST is funny too! Even though a couple episodes earlier he said he would stop being funny and everything would be just about science!
Very cool episode!
I can’t believe that it took 40 times…
I am quite grateful that I got to learn about relays and their essential use. Our family uses WD40 and I found it quite consequential that they mentioned the product in this lecture.
That is amazing
So fun to watch experiments being performed.
R15 is the best!
This was an interesting live.
YAYYYYY!!!! Science live!!!!!
THAT WAS AMSING
This is so fun to learn!
An Acellus world would be very interesting.
WD-40 is so useful
Very fun episode haha!
So interesting! Thank you for posting these every week!
I want to go to Acellus World
I always find information on DNA very interesting. The talk on cassette tapes was interesting. My mom has talked about them but I never knew anything about them and how they worked. The story on how WD-40 came about was helpful in teaching us to continue trying until you get the result you want.
3rd time watching Where would we be without WD-40 ?? So many uses!!!
R51 keeps me laughing
This is really interesting
This is so interesting.
Thank you!
Learning about NASA’s rocket experimenting was so fascinating.
I love the WD40 story. That’s very inspirational.
WD40 comes in hady
I loved this episode! My favorite part was the Technology Spotlight. DNA is shaped like a spiral which makes it easy to copy. The process requires unzipping it, and assorting itself in the right way. I can’t wait for the next episode!
Very interesting episode
enjoyed this video
Wow! I hope one day I could make it to Acellus world! That would be really cool.
I never new that wd 40 took 40 times to make it.
very interesting
This episode is funny.
R51 is my fav
I love these videos
I like the inspiration from the inventor part
This made me learn a lot!
I thought the “I got shocked” joke was funny
Do we use the radio set up now?
This was a cool live
Really fun episode.
This is fascinating!
I want to go to accelus world.
Acellus world would be so cool
I loved this video!
Is WD-50 different from WD-40?
It’s amazing that there is DNA from wooly mammoths that over a million years old.
They are trying to use dna to store information in really high densities for over thousands of years.
I love that he used spoons in the experiment!!
How could Relay technology advance in the future to improve scientific research?
I can’t believe wd40 has thousands of ways you can use it. That’s a really good invention.
I wonder if anyone in space gets anxiety after a while.
I didn’t know that about WD-40
Are their any classes that can teach more about the body for kids that would like to work in the medical when we grow up?
I can’t wait to graduate, but what if you can’t make it there
I want to go to Acellus world
Thanks for a great live
This was a very interesting lesson
this was great!
This looks funn
R 51 is funny.
Interesting fact about the WD-40 used by NASA
Acellus world looks like a good time.
This video has been intresting. I love it.
Playing with circuits is a hobby for me.
Storing with DNA is so interesting!
This is very helpful and also really interesting.
Why is the relay considered one of the most important building blocks in electronics, even though it’s such a simple device?
This is the best thing ever!
I would like to go to Acellus and visit in person!
love dr.b and r51 are the best!
Love the videos keep it up!
Love the videos keep it up+
Very intricate but fun
I love science live!
I love this live !
A radioactive frog sounds like something from a sci fi movie. my jaw dropped when i saw the radioactive frog!
Radiowaves are so cool!
My mom laughed at the joke Dr. Tobias said about life spans shortening when you laugh at a wife’s mistakes, it was hilarious!
wow i want to come to Acellus world some day!
R51 is funny
WD-40- so useful
Very interesting episode. I know personally we use WD-40 for rust and usually on bicycles on that chain part. But it’s always good to learn some more.
This is so interesting.
You’re the best Dr.B
We have been in a very similar state in the past but I think 🤔 the fact is the same thing happened
My mom cannot make it to acelles world.
But I really want to come.
Is there an acellus world in charlotte nc?
I don’t think there is. I’m sorry.
I love R51!
Oh boy, I hope I can come to Acellus world one day!
I laugh at myself all the time, it does make failing easier lol
I didn’t know that WD-40 stands for water displacement fluid
I never knew WD40 had so many uses.
This was really cool, I liked it a lot
I like how funny this episode is
It is very interesting to see a very important tool in technology in action and how it works.
R51 is always so funny, I loved this episode!
Science live is mind blowing
Was cool to learn about the different ways to put wd40 to use
Amazing, that’s the only word to describe it.
Dr R is so great love this live.
It’s amazing how many tries it takes sometime to get the right formula for something to be successful and how sometimes you find out your invention has more than one use.
It was so cool learning how clocks actually work, I loved this episode!
this episode was so interesting
I hope1 R 51 is Ok
he is fine !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
R51 is funny
The Relay he invented is so interesting and creative.
I watched this with my mom and sister and we learned alot
R51 is too funny.
This episode was fantastic and so informative. Dr.B really makes learning fun!
This was such a good live! Love R-51!!
Science live videos are so cool!!!
This episode was amazing!
Radio waves can be created with a spark?
I look forward to these!
I have always been fascinated by electricity and wires.
Love R51!
I did this in robotics for something in 4th grade, we had to test the electricity from batteries to a circuit to see if it could power a homemade oven while also using the sun with solar panels. It was super neat.
Dr. B makes this whole thing way more interesting!
It is very interesting that the bases of complicated technology is something that everyone could make.
Relays are amazing. And how it helps us with so many things.
Relays are my favorite please make more like this!
Is this something I can do safely at home?
can’t wait to create my own radio waves
Definitely one of the best episode yet!!
They relay technology is heavily growing
thank you for teaching me this!!
Science Live is amazing!
He has Tetris in the background.
This is so cool! Never heard of this before!
Best episode so far love it keep it up!
this video was on my birthday. really funny but anyways i love science live go Dr R.
I love circuits, and this episode!
Let’s go , time for science live!
I watched the relay.
Tobias is so funny
What are some examples of the right solution that will bond for DNA?
I made a switch relay for my Science fair project. It is interesting to watch the Acellus video after learning about this in my old school.
This lesson was amazing I got to learn about relays and their importance and what they are essential for.
Learned so much new stuff watching Science Live!!
Dr R you’re awesome
My grandpa used wd-40 for everything! lol
R51 was so funny in this episode of science live.
Wow never knew all that about WD40 and I’ve been around and used it most my life
I love watching science live, thanks for bringing us another awesome episode!
R51 WAS SO FUNNY
this was the best episode it was funny
These science live videos are so interesting!
I have actually used WD 40 before
R51 is the best
R51 was my favorite part of this episode.
I loved learning how WD40 was developed!
It’s so interesting how much of technology can be created and expanded forming from one invention. I wonder how much different our reality would be if the first version of this (electromagnetic switch) was thought up even just ten years earlier or later.
I’m a little late to the party, but this one was fun!
I love r51
210 light years away is crazy!and to be able to see a gas like helium
R51 is so funny in this science live episode
its crazy seeing how much information about us is contained in one cell.
I never knew WD-40 had so many uses!
I did not know that WD40 was used on rockets to keep water off.
It’s amazing how many technological advancements we can make by looking at ourselves or other living beings