This Is How A Smoke Detector Works [VIDEO]

Smoke detector is a device that detects smoke, typically as an indicator of fire. You probably have seen it in your chemistry lab, for instance, while performing experiments — but have you ever wondered how it works?

this is how a smoke detector works

The Engineer Guy” Bill Hammack 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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[via Youtube]