You can now buy me cake and things to take apart at:- https://www.patreon.com/bigclive
Part of me was expecting that these smoke detectors might have been fake or just very low quality. But as will be revealed in the video, they are actually quite sophisticated units.
Here's a link to Julian Ilets video of another type.
http://www.youtube.com/watch?v=rQy3qfV6Qz8
And the datasheet (on Farnell's website) of the chip that the one in this unit appears to be a clone of.
http://www.farnell.com/datasheets/234450.pdf

15 thoughts on “A look inside a cheap ebay smoke detector.”
  1. Avataaar/Circle Created with python_avatars Tony Dean says:

    Instead of replacing the IR LED with a visible one, you could use the camera on a mobile phone to view the IR light. Saves butchering the device.

  2. Avataaar/Circle Created with python_avatars Shankar Vembu Aky Alcantara says:

    That smoke detector is a shit. Won't last a week with 9V battery.

  3. Avataaar/Circle Created with python_avatars Paul Drake says:

    I forgot my dog was in the room and he freaked out at the noise. He's now hiding in the bathtub.

  4. Avataaar/Circle Created with python_avatars El Chavo Del 8cho says:

    Is there a way to tell if a smoke alarm has an ionization or optical sensor just by looking inside the chamber? I recently got a smoke alarm for $5 but it has no mentions on which type of sensor it has, not even on it's owner's manual.

  5. Avataaar/Circle Created with python_avatars DoctorX17 says:

    Both photoelectric and ionizing have their advantages… the best ones are the hybrids that are essentially two detectors in one package, one of each method. Best of both worlds

  6. Avataaar/Circle Created with python_avatars CraftyMulligar says:

    I got the other type nuclear type.

  7. Avataaar/Circle Created with python_avatars CraftyMulligar says:

    They got good piezo even lower voltages. I unsoldered it put it on a board.

  8. Avataaar/Circle Created with python_avatars Tammy Holland says:

    Hey Clive, can you do a teardown of a carbon monoxide detector? I am curious to see what the mechanism of detection is.

  9. Avataaar/Circle Created with python_avatars Ipsum the Purple Wuss - Loud Nation says:

    I shall be back shortly… Beep.

  10. Avataaar/Circle Created with python_avatars Stephen Lamley says:

    Thankfully vape doesn't set my alrm off probably because its not a optical one. I have no idea.

  11. Avataaar/Circle Created with python_avatars Ron Seymour says:

    Read any article about the Atomic Kid who tried and nearly succeeded in making an atomic reactor in his shed. He bought loads of detectors as one source of radioactivity. He also obtained thorium from the mantle of lamps and radium from old clock faces. The whole area had to be decontaminated.

  12. Avataaar/Circle Created with python_avatars Ron Seymour says:

    This is worth buying just for the 9v battery.

  13. Avataaar/Circle Created with python_avatars panama_rose says:

    Got mine for under $3.00 from China. Watching this to see if it was worth it.

  14. Avataaar/Circle Created with python_avatars MikeMike says:

    The first Big Clive video I've found unsuitable for relaxed up-all-night viewing!

  15. Avataaar/Circle Created with python_avatars Jay Are says:

    going to put this in my watch later… As I'm sure Clive sets it off at least once and it's like midnight right now! On the other hand… SUPRIZE FIRE DRILL KIDS… WHERE DO WE GO! WE HAVE PRACTICED THIS LETS GO!

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