engineerguy Bill Hammack Archive Channel

160123 Like and subscribe. This is an archive, check the link in the end if you are. Bill takes apart a digital camera and explains how its captures images using a CCD (charge coupled device). He also shares how a single CCD is used with a color filter array to create colored images. This video is based on a chapter from the EngineerGuy team's latest book Eight Amazing Engineering Stories (Learn more at http://www.engineerguy.com/elements) https://rumblevideoarchive.wordpress.com/

170816 Like and subscribe. This is an archive, check the link in the end if you are. This video contains a short announcement about the companion book for engineerguy series #4 (due out soon) plus outtakes. You can learn more about the companion book at http://www.engineerguy.com/elements https://rumblevideoarchive.wordpress.com/

170918 Like and subscribe. This is an archive, check the link in the end if you are. Bill opens up a computer hard drive to show how it is engineered. He describes how the "head" reads the magnetic information on the disk; reveals how a voice coil motor and a slider controls the position of that head. He also discusses how smooth a disk must be, and briefly mentions a mathematical technique that allows engineers to pack more information on a drive. https://rumblevideoarchive.wordpress.com/

191220 Like and subscribe. This is an archive, check the link in the end if you are. Bill uses a pile of old cell phones to show the seven basic design constraints that shape a mobile phone. You can find a transcript of this video at http://www.engineerguy.com/videos/video-cell-02.htm. If you would like to translate the captions first check on YouTube to see what translations we have and if we your language hasn't been translated visit http://www.engineerguy.com/translate https://rumblevideoarchive.wordpress.com/

070121 Like and subscribe. This is an archive, check the link in the end if you are. Bill takes apart an LCD monitor and shows how it works. He explains how it uses liquid crystals, thin film transistors and polarizers to display information. EngineerGuy's new book is at http://www.engineerguy.com/elements. https://rumblevideoarchive.wordpress.com/

160519 Like and subscribe. This is an archive, check the link in the end if you are. Bill reveals how "queueing theory" - developed by engineers to route phone calls - can be used to find the most efficient arrangement of cashiers and check out lines. He reports on the work of Agner Erlang, a Danish engineer who, at the opening of the 20th century, helped the Copenhagen Telephone Company provide the best level of service at the lowest price. https://rumblevideoarchive.wordpress.com/

240816 Like and subscribe. This is an archive, check the link in the end if you are. Bill takes apart a smoke detector and shows how it uses a radioactive source to generate a tiny current which is disrupted when smoke flows through the sensor. He describes how a special transistor called a MOSFET can be used to detect the tiny current changes. https://rumblevideoarchive.wordpress.com/

130123 Like and subscribe. This is an archive, check the link in the end if you are. Bill takes apart an incandescent to show how the tungsten filament is made. He shows it in extreme close-up and also discusses the material processing needed to produce ductile tungsten. https://rumblevideoarchive.wordpress.com/

091120 Like and subscribe. This is an archive, check the link in the end if you are. This video is used as a placeholder on the engineerguy website for videos that are just about the be released. In it Bill shares what some viewers have been saying about his videos. https://rumblevideoarchive.wordpress.com/

220918 Like and subscribe. This is an archive, check the link in the end if you are. The amazing everyday wristwatch: We never think about it, but only because engineers have made it so reliable and durable that we don't need to. At its heart lies a tiny tuning fork made of the mineral quartz. In this video Bill takes apart a cheap watch and shows extreme close-ups of the actually tunings fork. He explains how the piezoelectric effect of quartz lies at the heart of the watch's operation. https://rumblevideoarchive.wordpress.com/

151018 Like and subscribe. This is an archive, check the link in the end if you are. Bill uses a replica of the point contact transistor built by Walter Brattain and John Bardeen at Bell Labs. On December 23, 1947 they used this device to amplify the output of a microphone and thus started the microelectronics revolution that changed the world. He describes in detail why a transistor works by highlighting the uniqueness of semiconductors in being able to transfer charge by positive and negative carriers. https://rumblevideoarchive.wordpress.com/

030619 Like and subscribe. This is an archive, check the link in the end if you are. Bill opens up a vintage "black box" from a Delta airlines jetliner. He describes how the box withstands high temperatures and crash velocities because it is made from Inconel: A superalloy steels that is used in furnaces and others extreme environments. The flight data recorder he shows is a Sundstrand FA-542 and was likely used on a DC-9 in the 1970s, although it could have been used as late as 1988 on a Boeing 727. https://rumblevideoarchive.wordpress.com/

180922 Like and subscribe. This is an archive, check the link in the end if you are. Bill takes apart a coffee maker to show how hot water is pumped through it using a "bubble pump." The use of this pump reflects an engineer's choice to have only one heating element to lower the cost. https://rumblevideoarchive.wordpress.com/

190123 Like and subscribe. This is an archive, check the link in the end if you are. Using slow motion video Bill Hammack shows the ingenious engineering design of a pop can stay-on tab. To use the least amount of material it was designed to change, while in motion, from a 2nd to a 1st class lever. https://rumblevideoarchive.wordpress.com/

150816 Like and subscribe. This is an archive, check the link in the end if you are. Early calculating devices and computers used mechanical digital to analogue converters. This video describes one based on an arrangement of metal bars called a "whiffletree" - also sometimes called a "whippletree." It shows, briefly, the whiffletree used in IBM's revolutionary selectric typewriter and then illustrates the principles of a whiffletree converter by showing the simplest one - one that encodes digital impulses into two bits of information. (This videos is an appendix to Bill Hammack's video about the operation of the Selectric Typewriter.) https://rumblevideoarchive.wordpress.com/

290822 Like and subscribe. This is an archive, check the link in the end if you are. Theo Gray demonstrates briefly his iPad Element ap and "debuts" the Japanese version of Tom Lehrer's Elements song, which is featured in the iPad ap. This short interview was done after Bill Hammack interviewed him on the public radio show Focus - see http://www.will.illinois.edu/focus for a podcast of the Sept 29, 2010 interview. This video was shot by Sean Powers of Illinois Public Media. https://rumblevideoarchive.wordpress.com/

110816 Like and subscribe. This is an archive, check the link in the end if you are. Using slow motion video Bill Hammack, the engineer guy, shows how IBM's revolutionary "golf ball" typewriter works. He describes the marvelous completely mechanical digital-to-analogue converter that translates the discrete impulse of the keys to the rotation of the type element. (This is the typewriter featured on the television series Mad Men.) https://rumblevideoarchive.wordpress.com/