December 13, 2010 AT 11:40 am

Engineer Guy explains the world’s first transistor

Bill Hammack’s explains the world’s first transistor via MAKE.

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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1 Comment

  1. Just don’t <a href="">turn Hammack loose</a> with the actual original transistor…

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