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 »
Jack from NE.
hiiiiiii
Ezekiel, Hi from Texas.
hello from maryland
Hi 👋
Hello 🙋♂️, it’s Aaron and I am ready to be here and learn the newest information at science live.
hello from georgia
Hi from North Carolina!!
hi from GA!
Good evening everyone from NC!
I love science
Greetings from Tennessee!
signing in from tx hope everyones day has been amazing!
Hi from SC. Stay warm.
hi from md!
Hello All 🙂
I LOVE THIS LIVE
Science live is so cool I can’t wait to learn something new this week !
Excited for tonight’s lesson
So excited for the live tonight
ahnaliesa from Springfield oregon
Hello from Illinois!
I love science.
Hi from Georgia!!
Hello, from Texas! I pray that you all are doing good! God bless you all!
Hello from NC!
hi from nd
Very interested to see what today’s discussions are. Here’s to more learning
Hi from Mississippi !
hello from tx!!!
Hi I’m Adalynn but I prefer Addie:)
R51 is my favorite.
Hi from Mississippi!
Hello from NC!!
Hi
hello from NE
Hellooo
Let’s do this I’m ready to see r51 and his funny side.
Hi, guys, how you doing? I can’t wait for Science Live!!!!!!!!!!!! U guys?
It’s finally Wednesday science live!
hello from MS
Hi from Georgia!
Hi from TX!
I love science.
SO EXCITEDD
I cant wait for this live.
hi, from NY!
Hello from Delaware!
Hello I’m from new Jersey
I always look forwarding to watching these lives!
Good evening from TX
hi from MO
Hiii from Nebraska
Hi from AL!
Hello Kirialyz from Texas
here from ga
Hello from Texas!
Hello from ND!
Science live back at it again with another amazing live!
hi everyone
hello from new jersey!!
Hi, its Brooklynn from texas
hi from lousiana
hihi from md
Hello from GA.
HAIIIII TONIGHTS SCIENCE LIVE WILL BE AWESOME
Rickey from Texas
HI from Florida
Hi from Mississippi, I am so excited for this live!
hey from new hampshire
Hi from Alaska!
hi from texas
I love sience live
Hello from Texas!!
how’s everyone doing today
i love science live!
Cool
Hi! I am a new student at Acellus today. I’m excited to get started!
me to
Hellooo from TX
I’m from Florida
I wonder what the r51 does today?
Super excited for today’s live.
Hello from Louisiana
Luke here watching from Texas!
hi
Hi from washington!
Hi
Hi it’s Natalie from TN
Columbia TN here
Hi from California!
Hi guys
Hiiii, I hope everyone is having a blessed day, from North Carolina.
We’re watching from alabama
i love these , hi from texas
hi yall
Hi I’m Alyssa from Mississippi
hey I’m from Mississippi as well my name’s molly
Hello! I’m excited for todays live!
Hi I’m super excited to start the science live!!!!!!!!
Hi from Georgia!!
Hi , I’m autumn from Chicago.
Greetings from Kentucky
Hi from South Carolina,, it is going to be cold this weekend.
@Cade, commenting from South Carolina as well! Go the South!
Hello from NY!
hello from indiana
Hello from Arkansas!
Hi from houston
Good day from Tennessee!
Hi from Nebraska
I cant wait for this live!
heyy
Hi from nc
So awesome !
so excited for tonights live!
Hello.
Hi from North Carolina
ryder watches
i really love science live
hi
Excited for today’s science live
I love science live!!! Good day!
Hello from Texas!! Excited for todays L!ve :3
hi from Mo!!
Hi from Massachuettes!
hi from lousiana
early hello people
Hi from New Hampshire
Hello from Wisconsin!
Hello from Virginia twin 🙂
It is going to be cold this weekend in South Carolina
Hello from Massachusetts!
hello from america
Hello Hunter from Texas!
Excited for this lesson!! Thank you Acellus!
hi from New jersey
Hi from SC!!!
hii
Hello *
Hello
Hi from Katy everyone!
hello watching from florida
Hi from Arkansas!
Hey from TN!!!
Hello, Logan here
Hi from ct!!
hi from texas
Hi, from Texas
Hi from Texas!
Hello
So excited for Science Live!!!!!
Thank you for that information
Hi.
Hello from Connecticut!
hello from texas
Happy national squirrel day
Hello from Ohio
Hi from maryland
hello from florida i love science live do you think we can do a science live with just reading comment’s or do you guys have a schedule of what to do. love accelus.
Such a good episode
Hello
I can’t wait to see what R51 is up to today.
Hello from oklahoma
Hi alyna from texas
My favorite Live is at it again
hey
Hi from ny!
Hello from Georgia!!
good evening everyone
I love science live!
Hey 👋 👋 👋 👋 👋 👋 👋
Hi from Texas.
hellooo
I love Science live
hi
So excited for Science Live tonight!
hello! how is everyone?
I’m good
this is going to be great!
hey yall from mississippi
Very excited about today’s episode!
Hello from texas!
hello from georgia
hello