The Relay
December 10, 2025 • EPISODE 290
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 »
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Dna is very interesting
Loved this weeks lesson!
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What makes water work with steel?
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tech spotlight is the best. I’m probably gonna go into marine biology, but technology has always had a space in my brain.
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There must be so much data storage in your brain!! Edison, in New Jersey is named after Thomas Edison and I live in New jersey!!! That’s so cool!!!
There are so many things I never knew!
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how does the DNA hook up to the computer?????????
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When was rocket air craft made
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Who started in NASA?
If I finish all my schooling early, would I still graduate the same year originally or earlier? I’m supposed to graduate in 2028 but is it possible to finish all my schooling and graduate earlier?
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This is very interesting thank you
I love the Thomas Edison comment. I will always try again. Good reminder to never give up.
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That is so interesting
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dna as storage is such a crazy thing i would have never guessed our bodies were so insane
How many valedictorians does Acellus have each graduation year?
DNA is so cool!
There is no limit for invention
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When is the estimated time that humans will be able to go to Mars?
always interesting to learn about materials and about spaceships
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Did they go aluminum?
who was the first person to discover how to use dna?
How are helium cloud made
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That’s cool, who knew you could store data using DNA?
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Thrilled for this week’s episode!
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Dna to store pictures is awesome
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i think you should not give up
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How did DNA form and how does it work what is the point of DNA?
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How do you put the data into the DNA?
its incredible you can take DNA data and fit it in the palm of your hand
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I don’t think you should give up!
do you believe that someone could make a robot that can hold more data than humans?
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how long does it normally take for a rocket to be built
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Dna for storage is actually really cool imagine how the future could be with it.
ohhhh i cant wait to start to learn about space
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if you are working on something and actually get far before getting stuck/slightly demotivated I’d say keep on pushing
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My dad was saying he used to have cassettes a long time ago, crazy how sometimes things come back!
imagine how far we can go from where we started with electronics.
hello from Maine exited for tonight
I think you should try over and over again till you get it how you want it.
That’s cool, who knew you could use DNA to store data?
10/10 explanation DNA as a form of data storage is wild
dna storage is amazing more storage for more stuff how would you use it though
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Good evening, I really enjoy watching science live. It was interesting learning more about DNA and how it we incorporate that data very insightful information.
I always enjoy watching Science Live!
Hank you, Dr Jon! All of that info on DNA was very interesting. Would love to know more.
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How does the dna in the cassette work exactly?
How is data stored on a phone?
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What organization started trying to storge DNA?
What does DNA stand for?
Could the DNA storage technology be used as a fail-safe against the extinction of endangered animals, preserving their DNA to brought back in the future, similar to Jurassic Park?
Practice till I get it right
If your trying to invent something you should try until you get it right and don’t give up
Haw much dna is in your body
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hello science live!!!
do you believe that someone could make a robot that can hold more data than humans?
yes!!!!!!!because I’m going t make it!
wow so interesting
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What is the estimated cost of DNA storage compared to the price of a SSD?
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It’s wonderful that even kids going through homeschooling, can still have a graduation of their own. I’m glad that they get to experience one too.
hey hey
Are there any other uses for this DNA storage system?
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Hi from tx
how much DNA does it take to make a item with it?
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How could we use this storage decive in every day life?
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How does the body make DNA?
I LOVE SCIENCE LIVE
flash drives store alot of data to
Hi from Alabama!!
Is the tape they use a cassette tape like the old cassette tapes that were used for recording music or is is the same concept but a different type of material on it to store the DNA? That’s wild though to think that’s it’s a “new but old” technology. Cool!
you should NEVER give up when you try something!
I learn something new every day about DNA.
Hello from Long Beach, how do you load data with the stored data in the DNA cassette tape?
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That’s cool, I didn’t know you could use DNA storage like that!
From Illinois I saw a lot of interesting things today!
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That’s genuinely fascinating to learn about 😮
Dr. John always talks about the most interesting things! And I am excited for todays science live.
The storage of DNA is crazy, and I thought that it was just Science Fiction
How is data stored on a computer?
Tech is amazing. I think tech is the most important thing we have today.
That’s super cool how they can dehydrate dna and make it a powder
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We need to start using DNA for storage.
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Hello from Mississippi! On a cassette tape? That’s crazy!
Evan Gregory is here! Hello from Virginia! I would love to learn more about this DNA storage. Technology is so amazing!! Thank you for sharing!
Dna for storage is so cool
Is there any way to duplicate something similar to DNA into computing storage systems to increase their storage size?
It is so fascinating how people think of this stuff. I never would have thought of DNA and computer storage related to each other.
Wow, bringing back the cassette tape! My parents have some of those in the basement, haha
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Able to use your DNA for storage is crazy. We start doing that.
How do we use dna as storage?
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hello acellus
How do they store the DNA in the strip
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Cool
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who created the word terabyte?
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