The freebie from Volkswagen

zaveri

zaveri

@zaveri-5TD6Sk • Oct 1, 2024
Today morning , THE HINDU featured a special advertisement section for volkswagen cars.

Attached to the paper was , a small rectangular, device, which on pressing would cause vibrations, the same kind which one would experience while a driving a volkswagen.

I took this thing apart , only to find a motherboard, with two batteries and a circular shaped device connected to the batteries.

now what do you think this device was ? piezo-electric crystal ?
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  • Kaustubh Katdare

    Kaustubh Katdare

    @thebigk • Sep 11, 2012

    Post the photo, please.
    0
  • zaveri

    zaveri

    @zaveri-5TD6Sk • Sep 11, 2012

    haven't got it by the moment. but will do it soon.
    0
  • Jeffrey Arulraj

    Jeffrey Arulraj

    @jeffrey-xA7lUP • Sep 16, 2012

    that uses LDR when light falls resistance falls and ckt is closed

    in dark resistance =100Mohm and thus an open ckt
    0
  • zaveri

    zaveri

    @zaveri-5TD6Sk • Sep 17, 2012

    @jeffery samuel

    what is ckt ?
    0
  • Jeffrey Arulraj

    Jeffrey Arulraj

    @jeffrey-xA7lUP • Sep 17, 2012

    the battery is connected to a vibrator which could be any thing i am yet to study it in detail

    but the series connection is connected through an LDR

    the set up is this battery+ve---> LDR---> some vibrator block---> battery -ve

    hope this is useful

    i am yet to study it so I have limited knowledge of detailed circuit
    0