Smoke Detector Teardown

Written By: Ari Dubinsky
Published: 04/03/14
  • Comments: 3

Smoke Detector Teardown

Published: 04/03/14

Teardown

Introduction

For our reverse engineering project, we chose to use the smoke detector. This smoke detector consists of a sensor to detect smoke and a loud electronic buzzer to alert people within the building.

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    • Use a screwdriver to pry open the plastic enclosure. It might be easier to push the buzzer through the hole, if you need extra leverage.

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    • The buzzer is unhooked from the PCB board, by hands.

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    • This is the circuit for the smoke detector. It is powered by a 9V battery. The 3 metal leafs are contacts for the buzzer and the bigger leaf is for the test button.

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    • The metal cap is removed to reveal a, MC145017, driver chip and americium sensor. Do not remove americium from the sensor!

    why did you do this do you know how dangerous that is americium 231 is a highly radioactive metal you could HAVE KILLED YOURSELVES

    Alex Matthiessen -

    Americium 231 hasn't been confirmed. Ionization smoke alarms contain tiny amounts of americium 241, which is relatively harmless unless you ingest/inhale it, and even then it's potentially carcinogenic, but not carcinogenic enough to cause immediate ill effects.

    River Saxton -

Author

Ari Dubinsky

Member since: 04/03/14

253 Reputation

One comment

Thanks bro 👍

BrunostNoodles -