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 »
What else does the model t do
i love how transitors work! super cool
Robotics might be my favorite part of science…
I didn’t know that there were sharks who could breath air some!
Hello from MN!
Could this tiny robot be made to go into the human body for more accurate medical examinations?
I liked the proteges and their video.
Cool how Science has developed over the years .
This episode was funn!! Learned a lot about transistors
I watched this one a while back but forgot to comment! I remember seeing the robots during this live though, it’s super cool to see!
So cool!! I appreciate the time yall take.
This was one of my favorites.
i liked learning abt the model t
I really wish Tobias had a course.
Hi from Texas