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The freebie from Volkswagen

Question asked by zaveri in #Coffee Room on Sep 11, 2012
zaveri · Sep 11, 2012
Rank A3 - PRO
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 ? Posted in: #Coffee Room
Kaustubh Katdare
Kaustubh Katdare · Sep 11, 2012
Rank A1 - PRO
Post the photo, please.
zaveri · Sep 11, 2012
Rank A3 - PRO
haven't got it by the moment. but will do it soon.
Jeffrey Arulraj
Jeffrey Arulraj · Sep 16, 2012
Rank A2 - PRO
that uses LDR when light falls resistance falls and ckt is closed

in dark resistance =100Mohm and thus an open ckt
zaveri · Sep 17, 2012
Rank A3 - PRO
@jeffery samuel

what is ckt ?
Jeffrey Arulraj
Jeffrey Arulraj · Sep 17, 2012
Rank A2 - PRO
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

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