The Vacuum Tube Diode
January 7, 2026 • EPISODE 292
What invention helped spark the age of electronics? In this episode of Science LIVE, Dr. Roger Billings and the Protégés break down the vacuum tube diode—one of the earliest electronic components that made controlling the flow of electrons possible. Learn how this simple device works, why it was so important in early radios and computers, and how it laid the groundwork for modern electronic technology. Join us for a clear, engaging look at a key milestone in the history of electronics.
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 »
happy new year! from TN
That’s cool about the drone flying into a tornado but wouldn’t it get destroyed?
What was your favorite thing about 2025
Hi everyone! from L.A.
Happy new year! I hope you guys keep thinking of great ideas for Acellus in 2026. Have a great day from Myka.
Hi from GA!!
hi
Hi
Hi from Mississippi!
Howdy from texas and happy new year everyone im so excited to be back for another year of science live with Dr. Roger Billings
Comment* Let’s go first science live of 2026!!!
checking in from North Carolina
Hello from WV!!
*here from texas! so excited these are back.
hi Michael from ny
It’s very interesting that anastesias design can save people’s life’s
Hello from NC
Hello From Las Vegas
Hi from NJ
hiii
hi from MD
Hi from Maine
Hi from Texas
Hello, from Texas!!
Hello from mo. Can’t wait for this week’s episode 😍
Hi from Oklahoma
Hi from CA
good afternoon
Hello, from nevada!
Happy New Years everyone! 1st live stream of the year!!!
Hey from Georgia
So excited when i can do higher advanced classes!
Hi I’m KRUE and I’m from maryland
hi
From Texas, happy new year.
hi from thailand
cant wait for science live!
Nice live
hai!!! i cant wait to be back for learning. happy new years!
Hello from SC!
Happy New Year!! hope everyone had a good christmas!
hi and happy new year
Happy New Year thank you for science live and always being inspirational looking forward to watching science live again. Acellus is the best school and I always learn so much . Thank you for this school.
hi Tate from fort belviour happy late new year.
hi
Hi from massachusetts! ready for todays video!
hi
hi from tx
Hi from Rhode Island!
hi from georgia
Hi from kingsport
Happy new years !!!
Happy New Year
Happy new year from Louisiana!!
Hello everyone I hope everyone had a great Christmas and new years
Plants can also help produce more clean air.
Hi from Kentucky!
Happy New Years!
happy new year from virginia
hi from Tennessee
Hope everyone enjoyed the holidays!
Hi
Is it a great new year 🌹😃😃
hi from Michigan!!
hello from NC
Hi from North dakota
Hello everyone
Happy New Years Science Live!
Hi from Tennessee
hi from nc! hope yall had a good chrismas and new year!!
Happy new year
First live of the year!
What are AP classes
Hello from Nc! happy new years, i am excited to learn more this year!
hello from GA!!
Hello from Kentucky
hi from indiana excited for today
hello from north dakota!
Hey from Kentucky
checking in from u.s.
hello from arizona
Happy new years!!
Hi from Georgia
Thank you for the video.
Happy new year!
Hi I’m from North Carolina
Hi from Louisiana
Here from Arkansas happey new year to everyone
how are yall
hello and happy new year
This is going to be a good one. Comment on this comment if I am right
HELLO from IL
Happy New Year from Kansas!
happy new years everyone!!
haii from floirda!!!!
hi
Hello happy New year!!
I’m excited about science live for 2026! I’m ready to learn something new this evening!
Stoked for todays show!
Hello!
Hii guys so excited to hear what we are going to learn about tonight!*
hi from North Dakota
Hello, I’m happy to be here tonight learning new things.
My name is anastasia and I started Acellus in 9th
Camilla from Texas! 2026!
Hello from SC!
Hello from Utah
Hello from New York!
hi from south dakota
Hello from Illinois.
i love this
hi
Hello from NC!
Exited to see what to days lesson will be!
Happy new year everyone!
hi from Florida
Hi from Texas! Happy new year!
Happy new year you guys so 2026 😊
Happy new year!
Happy new years!!
from texas
Happy New Year from Georgia!
Hi everyone. Listening from AZ
Hello from TN!
Hi from New Jersey
hey
Haven’t seen one of these since last year! Get the joke? Anyway, happy 2026!
Hello
Comment Happy New Year!
hello from Montana!
Hi
So happy science live is back!!!
Hi from CT!
hi
Hi from Arkansas!
hello!
happy new year
Hello from NC
Happy New Year!! Hi from Texas!
cant wait from ri
Hi from NH!
Happy new year from Chicago!!
Happy New Year!! Watch planets breathe??? Wow! Interesting!
cool
Thank you for the information about plants. It was helpful.
Hey everyone
Hello everybody and happy new year. Science live has helped me learn things I never knew before, and I learn new things every wednesday night. Today I was learning about the light bulb and how they work, and that was really interesting.
Happy New Years! So excited for all this year’s coming Science Lives!
Hi all!
Happy New Year!
Hi from KC
Happy New Year! Very cool to hear about being able to watch plants breathe!!
Happy New Years Science Live
Hello from New York
Hi!
Hi from South Dakota
Welcome back! Happy New Year!
its my first day!
helloooo
good evening!!
Happy 2026 to everyone at acellus. I hope this year is as great as the last!
happy to watch the new year of science live! lets go 2026!!!
happy new year!
happy new years everyone! <3
Hey! Happy new year everyone!
Happy new year!
Happy new years! From California
happy new year everyone
hi from ct
good night everyone!
Mark from Tn
First live of the year! hello from NC
Happy new years to everyone!!
Hello! Happy New Year and I hope everyone had a lovely Christmas and Winter break!
Happy 2026!!!
Happy new year and merry Christmas!!
happy new year Acellus!!
hey!!
Happy New Year from Mass!
Hello from Boise
hello from Alabama!!
Happy new years!