Transistors
January 21, 2026 • EPISODE 294
What is a transistor and why is it important? In this episode of Science LIVE, Dr. Roger Billings explores how transistors control electric current, replaced bulky vacuum tubes, and made modern electronics possible—from radios to computers and smartphones. The episode also features a tiny bug-like robot developed by MIT and the fascinating story of Henry Ford and how Thomas Edison influenced the development of the automobile.
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 »
Hello from Illinois
hello
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Hello!
hi
How could the flying robots help?
hello from Georgia!!!!
Hello from Germany!
Hi from Missouri
I like the little robot
Hello from New York
How small is this robot?
that’s a rlly cool robot i didn’t know they designed robots wondering about how it could move like an insect
Hello from Texas!! Ready to see what tonight has in store for us!
Happy Wednesday from Idaho
How do you enter the science fair if you live in Idaho Dr. B?
so cool
What would you use tiny robots for?
hello from Missouri!
Hi from illinois
heyyy
Hello from Missouri
Hello to all Acellus students I hope evryone hade a good week
Here’s a joke:
What is a pirate’s favorite state?
ARRRRRR-kansas!
Hello from Mississippi!
that cool
im so glad to be here
Hello!
Are some animals genuinely robots and we just don’t know?
Hi from CT!! Love the weekly science lives!
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Hello from Georgia
HI FROM VA
I enjoyed learning about the sharks!
A robot insect? So interesting!
Hello!
Hello from Texas.
Hi from Missouri
Hi!
hi im here
Hello From Maryland! Very hyped up for today’s episode.
Hi how are you
hi from texas love the lives.
love this👌🏽
Hey from Florida!
how can insects move so fast?
here from GA!
i like technology its fun
I truly wonder how small robots can get
This is cool.
Hello from MD
this is interesting
Hello from Texas!!
How can the computer find eye cancer?
hi from IL
Hello from Colorado!
Hello from Texas! Who qualifies for the science fair?
hello from MS
liking the show tonight lads!
Hello from Texas!! 🙂
I love Wednesdays!
What is technology specialist?
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Hello everyone I am from Colorado
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I love science live
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Happy Wednesday!
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hi from Tennessee
hi from GA!!!
Hello from the USA!
That’s so cool, what she created is amazing.
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From Louisiana, love this week science live!
Hello I from Grand prairie
Hello from tx
Love this keep going!
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I love Acellus
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I am here from Missouri.
hi from Arizona
Technology is really cool!
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hi from Texas
Hi! I am ready for this weeks science live! I hope everyone has a goodnight.
how many named sharks breeds are there
Hi from Alabama
hello from Texas
hi from hawaii!
Hiii. From Alabama.!!
what is acellus world?
I love science this will be so fun! 😁
Hello from Kansas.
how are yall
hi from idaho
Hello from Kentucky!
I love science
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hello from Michigan! Excited for today’s stream
Hello!! From Texas
hi from Sc
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Hello everybody!
Can we watch the science fair on our devices?
Hello from Kentucky! 🙂
Hi from Virginia.
Wow that research was amazing. I wish there were more coding activities for 2nd graders! I would also like to have science labs
Hello from Colorado
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Happy Wednesday!!
so excited for this live!
Hello from Roby Mo. You should put the tickets in the shop for the fair when you do it. 🙂
greetings from mississippi!!
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Hi From Florida . Can’t wait to listen to this science live.
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HELLO from New jersey!
wow, this is so interesting!
Hello from Michigan
Hello, love hearing about the science fair!
Hi from Louisanna.
Hello my name is Jameson and I am from Maryland. I am excited for today’s science live!
That so impressed she did that! Wow!
Hi from NC
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great video! love from south dakota
hi from Mississippi
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hello from Oklahoma
Hello acellus, if this is science live will they be more like language arts live math live?
Hi from Washington
hello from Idaho!
Hi from Idaho!
Hello, from MS!
hi from Florida
Good evening from Maryland”
Ready to learn something new
hello from S.C
Hi from georgia
That’s an awesome invention.
Hello from Massachusetts! How can we continue advancing our technology while maintaining a good state for our wildlife and environment?
I liked hearing about the sharks that produce eggs without using energy
Hi from the freezing state of Texas
Wow, coding a whole app BY YOURSELF is really cool!
I’m so excited for this live!
Hello from Tennessee!
hi Dr Billing I would like to see you some day and you tpp Dr. paja
Hello from the texas
What’s up from NYC to
Hello, how have you been?
Hello first time here!
Way to go, Richa!
Hello from Ohio!!
the science fair sounds cool, might do it next year
See I told you I would come back. But I love love love love love love Love Science Life and did you ever know that Science Life is awesome and the best teacher ever is awesome Hay did you know that 😄 but it is the same thing as the teacher in the world 🌎 is awesome and funny! But you are the best teacher ever ho and you Friends.
hi from united states
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Hello love science hope yall have a good time ❤️
Amazing project girl! Love Science Live!
Watching from Illinois! I love watching Science Live!! The R51 is very silly.
Hello from LV
hi how you doing
Early dedection of cancer would help so many people
Hi from NC, I’m so excited to be here.
My dad gets migraines,