The freebie from Volkswagen

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

Post the photo, please.

haven't got it by the moment. but will do it soon.

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

in dark resistance =100Mohm and thus an open ckt

@jeffery samuel

what is ckt ?

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