Tag results for hammack
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how the first transistor worked
Bookmarked 795 weeks ago 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 |
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black box: inside a flight data recorder
Bookmarked 791 weeks ago bill opens up a vintage quotblack boxquot 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 |
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the ingenious design of the aluminum beverage can - youtube
Bookmarked 270 weeks ago bill details the engineering choices underlying the design of a beverage can he explains why it is cylindrical outlines the manufacturing steps needed to cr |