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Podcast: Engineerguy videos & audio
Episode:

How smoke detectors work
Category: Education
Duration: 00:03:45
Publish Date: 2011-03-08 07:33:25
Description: 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.
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