IC – Divide by 3

How can tiny transistors do math? In this episode of Science LIVE with Roger Billings, discover how integrated circuits use logic gates and on-and-off transistors to multiply, divide, and process numbers. See how a simple “divide by 3” circuit is built—and how millions of these tiny switches working together make today’s powerful computers possible.

Roger Billings also talks about the engineering behind the Falcon 9 from SpaceX. In addition, learn how gallium could be used to generate hydrogen as a clean energy source, highlighting exciting possibilities for future energy innovation.

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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3,063 Comments

  1. Kaydan

    I enjoy the graduating plan, with goals all shown on one page i am so excited Thank you

    Reply
  2. Grace

    So, if good bacteria strains can kill cancer, probiotics would be smart to take! The more strains probably the better, this sounds like something that could possibly prevent and cure? SUPER COOL

    Reply
  3. Quinton

    Acellus is the best!!

    Reply
  4. Tasneem

    This episode helped me understand how digital logic works using basic on/off signals. It’s interesting how something so simple can power complex technology.

    Reply
  5. Ravali

    It was so cool learning about how transistors do math!

    Reply
  6. Alice

    Love watching these, wish to see these in person!

    Reply
  7. Catalina

    I’m excited to see what we can do in the future with all these technology advancements!

    Reply
  8. Lacie

    Great science live today! The more I watch, the more I realize there’s a lot more that I don’t know about. Science live has been a great learning experience. Can’t wait for the next one!

    Reply
  9. Arianna

    It is fascinating what the human brain can come up with.

    Reply
  10. Abby

    Always so fascinating and enlightening to watch these videos! Thank you Dr. Billings!

    Reply
  11. Koriyah

    This is so cool. I’ve always used computers, but I never really thought about what was happening inside the silicon. It’s wild that something as simple as a logic gate can scale up to be a supercomputer. Definitely going to try and map out a simple circuit after watching this

    Reply
  12. Mary

    Circuits are so advanced. It is amazing what little tiny things hide inside of everything to make a functioning machine

    Reply
  13. Matthew

    The brain is quite complex and interesting

    Reply
  14. Isaiah

    Ms. Pajet was SO funny this week, I love these every time!

    Reply
  15. Evelyn

    The bacteria fighting cancer cells are super interesting!

    Reply
  16. Aiden

    i love it when you guys explain what NASA is doing

    Reply
  17. Levon

    The brain is really cool. My mom also loves the brain. She talks about it all the time.

    Reply
  18. Owen

    I wonder how small transistors will eventually get. how much computing power will we be able to have in a space as small as a laptop? Also, I wonder what new sources of hydrogen we will discover as the world strives to become more environmentally friendly.

    Reply
  19. Hannah

    That is pretty neat how gallium could be used to make hydrogen even with impure waters to one day hopefully create a new avenue for more hydrogen powered products to be more affordable and safe for the environment.

    Reply
  20. Cherish

    I’m so happy for the advancements that have been made to fight cancer.
    Now I know what mono means in sound selection. Always learning something new.

    Reply
  21. Joshua

    It would be cool seeing this in person

    Reply
  22. Athena

    R51 is so funny

    Reply
  23. Trenton

    My mom thanks you for the high school information!

    Reply
  24. Adler

    The brain is truly an amazing thing, pretty crazy what it can all do….. update please

    Reply
  25. Tali

    I love learning about starlink. Aerodynamics are so interesting to me

    Reply
  26. Brooklyn

    The brain sure can do a lot of things! Such a cool episode

    Reply
  27. Helen

    Dr. Billings is the best!

    Reply
  28. Megan

    yay for claudia hahahahah

    Reply
  29. Isabella

    I thought the surround sound speaker that Tobias mentioned was quite intriguing.

    Reply
  30. Kessie

    Interested to see if the bacteria for fighting cancer actually works. That would be amazing!

    Reply
  31. Nicholas

    That eye story was interesting

    Reply
  32. Regan

    its very cool how they can put a certain type of bactura to kill cancer will it work??

    Reply
  33. Hunter

    What is the Bacteria made out of that fights the cancer?

    Reply
  34. Ian

    I liked when Caleb and David talked an IC that can divide by any number up to 99, and I also liked the western division battle.

    Reply
  35. Cameron

    THE CANCER CELLS ARE SUPER INTERESTING!!!!!!!!!

    Reply
  36. Maci

    Watching from North Carolina!!

    Reply
  37. Todd

    good job western mathers

    Reply
    • Gavino

      Watching from Texas

      Reply
  38. Chenielys

    Our brain can do so much and we don’t even realize!

    Reply
  39. Seth

    I’d love to get an update on the cancer treatment.

    Reply
  40. Mason

    How can you make a digital clock using a decade counter?

    Reply
  41. Evan

    the brain can do a lot of things

    Reply
  42. Gabriela

    I love SCIENCE live.

    Reply
  43. Bella

    this metal thing can melt on hot water that awsome

    Reply
  44. Abigail

    I like the part where they were dressed up like cowboys.

    Reply
  45. Kryslee

    I liked the portages there funny

    Reply
  46. James

    This is so amazing! I wish I could go to one of these in person!

    Reply
  47. Brady

    Hi Dr. Roger Billings. This Wednesday class was so interesting. I liked to learn about How to Divide by 3 with IC. Can’t wait for next Week!

    Reply
  48. Chloe

    I liked the Proteges dividing device.

    Reply
  49. Antonia

    R-51 and the Protégés are my favorite part of the sience live.

    Reply
  50. William

    I had no idea that our brains could do those things!!!

    Reply
  51. Emma

    Dusty Dave and Crusty Cal lol

    Reply
  52. Lillian

    Our brains are so cool!

    Reply
  53. Kenlei

    Had an amazing time watching this live cant wait for the next one. Im so excited to see what other lives are to come in the future. Im from GA i really enjoy the lives that ya’ll post i have so much fun watching them

    Reply
  54. Robert

    I really enjoyed learning about Alan Blumlein!

    Reply
  55. Galilea

    I loved the western theme for this video

    Reply
  56. Teagan

    The brain is so amazing i hope this will work for all cancers

    Reply
  57. Jason

    wow, that was so cool about the brain and stuff!

    Reply
  58. Thomas

    The cowboy part was pretty cool in my eyes, I really like the math inventions!

    Reply
  59. Colton

    The protégé’s are great and r 51 is flipping stuff that we learn upside down. The new rocket sounds cool!

    Reply
  60. Gali

    I loved the western theme for this one

    Reply
  61. Derrick

    thats a huge rocket

    Reply
  62. Liam

    I loved the technolgy part this week!

    Reply
  63. Teke

    That’s cool fact about gallium

    Reply
  64. Milan

    Watching from Chicago! I love Science Live!

    Reply
  65. Kahleen

    It’s so crazy that they can use any type of water for this.

    Reply
  66. Elijah

    Science is amazing.

    Reply
  67. Sebastian

    I find the part about how stereo was created!

    Reply
  68. Trevor

    I want to learn more about the Circuit board

    Reply
  69. Katherine

    I love acellus live 🙂

    Reply
  70. Caleb

    I liked the r51

    Reply
  71. Madelynn

    love watching science live so much fun to watch.

    Reply
  72. Novani

    I did not know Alen blumlein invented stereo, thats really cool! It’s also fascinating how your ears and brain work together like that.

    Reply
  73. Emtsaal

    I loved the science live today : )

    Reply
  74. Zoe

    I was in California recently and was able to see the Starlink launch. It was a great experience.

    Reply
  75. Sawyer

    I LOVE the protegessssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss

    Reply
  76. Meghan

    interesting about the graduation plan. If I know what I would like to do after High School can I go ahead and do a graduation plan now? I am currently the sixth grade.

    Reply
  77. Rosalia

    Is there a high risk of transfering the bacteria elsewhere throughout the body when trying to kill the cancer cells?

    Reply
  78. Abbott

    Yeehaw from Georgia!

    Reply
  79. Emily

    I did not know that the Wild West was full of division🤯

    Reply
  80. Isabelle.

    Had fun watching this video!!

    Reply
  81. Kalilah

    Wow! Learning about the brain was so interesting!

    Reply
  82. Amiah

    How much force does it take for the rocket to blast off into the sky?

    Reply
  83. Nick

    This one made me think!

    Reply
  84. Raina

    Gallium is my new favorite material now!

    Reply
  85. Escudero

    the brain is so mezmorizing

    Reply
  86. Charlie

    Do you think Starlink will replace the internet someday?

    Reply
  87. Makenna

    Hi from Illinois, the brain is so interesting!

    Reply
  88. Luca

    That’s really cool — I liked learning about how they figured out how to make sound have depth and provide an experience like you would in real life.

    Reply
  89. Justin

    where can you buy gallium?

    Reply
  90. Anacaryna

    Cancer is super scary, I hope I never have to deal with it

    Reply
  91. Alia

    The brain is such an amazing organ!!!

    Reply
  92. Aaliyah

    Hello from Missouri! <3

    Reply
  93. Hudson

    Very funny and I love what point it’s making.

    Reply
  94. Luna

    This was my favorite episode yet!

    Reply
  95. Marcus

    Science live is so fun to watch!!!

    Reply
  96. Brennan

    Would taking atoms from the gallium change it to something different? I don’t mean like a different material, like different type of gallium.

    Reply
  97. Rylie

    This video was so much fun to watch and im definetely looking forward to more!!!!!!!!!!!!!!!!!!

    Reply
  98. Sophia

    It was funny seeing David and Caleb dressed as cowboys

    Reply
  99. Natalia

    ❤️❤️❤️❤️❤️❤️❤️💕💕❤️💕💕

    Reply
  100. Elizabeth

    I love watching Science Live!

    Reply
  101. Allyssa

    The brain can really do some crazy things sometimes!

    Reply
  102. Dominic

    Had fun watching this video

    Reply
  103. Kaden

    This was so cool!

    Reply
  104. Jaden

    The brain is amazing

    Reply
  105. Dominik

    My fav is R51

    Reply
  106. Keira

    I love science live its so cool

    Reply
  107. Max

    Area 51 WAS FUNNY🤣🤣🤣

    Reply
  108. Madison

    😍😌🤣

    Reply
  109. Aubrey

    How far out are we for an actual cure to cancer using the principals mentioned today?

    Reply
  110. Kamari

    the brain is awesome!

    Reply
  111. Brentan

    Thank you Acellus!

    Reply
  112. Haigen

    I really hope they find something to cure cancer!

    Reply
  113. Oliver

    That was interesting to hear about the brain.

    Reply
  114. Jocelynn

    The sound part of the movie theater was really cool!

    Reply
  115. Nyssa

    I love science live because I learn different things every week and I learn so much from science live .

    Reply
  116. Wilder

    What time is the science live?

    Reply
  117. Eimy

    Thank you for explaining the whole education plan process. I think I’m going to watch that fantasia movie, after all you’ve described. Science live is the best. Dr Roger Billings is like a dad figure to many. Wow. If only I could see that rocket. What did you guys think about this episode?

    Reply
  118. Jay

    I love the illustration. Very cool.

    Reply
  119. Kane

    Always love the inventioneers and prodiges!

    Reply
  120. Emma

    how long do will the the prosess take to create hydrogen using Gillian take.

    Reply
  121. Hailey

    The brain is really cool. My mom also loves the brain. She talks about it all the time.

    Reply
  122. Jack

    When will the cancer eating bacteria be used in the world?

    Reply
  123. Joseph

    The skits are so funny.

    Reply
  124. Donavyn

    how do stars move

    Reply
  125. Eva

    The gallium is so amazing!

    Reply
  126. Lola

    This episode was so fun!

    Reply
  127. Conner

    i LOVE SCIENCE LIVE

    Reply
  128. Parker

    Is gallium anything like oobleck?

    Reply
  129. Vi

    Thanks for making these videos. There they’re fun to watch. Hi from Montana!

    Reply
  130. Lily

    This was so cool!! the brain is amazing!

    Reply
  131. Levi

    Happy March everyone! Can’t wait for the blood moon and lunar eclipse!

    Reply
  132. Aleisa

    I like the part about the melting metal.

    Reply
  133. Luci

    I had never known that about sound

    Reply
  134. Elsa

    Hey from WA!

    Reply
  135. Zorion

    I liked the explanation with the water bucket

    Reply
  136. Nathan

    Love the rocket models!

    Reply
  137. Katie

    this was a really cool episode

    Reply
  138. James

    Somehow, I had no idea Gallium existed, what an interesting metal! hopefully we can use this in the future for more sustaiable energy.

    Reply
  139. Hana

    That’s what’s very cool about gallium how it can make hydrogen.I have never heard of Potentialominus thank you for doing this video every week I really love it. And go girl because I am a girl and that was awesome

    Reply

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