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Cheap Cell-Phone Detector
An anonymous reader contributes a link to a BBC News article on a cheap cell-phone detector created by six New Zealand high-school students for a business competition, excerpting "The detector, which they have called CellTrac-r, works by picking up the bursts of radio frequency activity that emit from a mobile each time it sends or receives a call or a text message. The device can detect these bursts of electro-magnetic energy up to a radius of 30 metres. It can also measure the amount of the energy to determine the distance of the mobile.", and noting "Seems like a perfect /.er hack project, and as initiator I get 5% of gross profits."
Why would you want to detect cheap cell phones?
In Soviet Russia the insensitive clod is YOU!
...a great way to find my cellphone those times when I put it on silent ringing and then forgets where I put it down :) (don't laught - it happens more often than I like to admidt). Now, if they could also find a way to indicate not just how far away the mobile phone is, but also in what direction... shouldn't be hard - either a directionloop, or two antennas 90 degress apart.
Everything in the world is controlled by a small, evil group to which, unfortunately, no one you know belongs.
So this thing can detect a mobile phone only when it sends or receives a call or text message? I'm not that smart, but I figure that would tend to coincide with either the phone making a ringing or beeping noise, or someone talking into it.
...?
Hmm, how could I possibly detect this using attachments I've had on my head since birth
Just listen for somebody shouting "I'M ON THE TRAIN!". As if we didn't know already.
You don't need a lab to make mud.
so that the MPAA goon squads can kick your out and confiscate your phone before you can text all of your friends and warn them not to waste their money of whatever shitty movie you had the misfortune of seeing first.
LK
"Hi. This is my friend, Jack Shit, and you don't know him." - Lord Kano
If you want an exact conversion, 30 metres is equal to 3000 centimetres ;)
How many dicks is that?
a lot.
Ears are so cheap I got two of them. I can detect cell phones quite well.
Last I checked this was still the "land of the free".
Just out of curiousity, how many years has it been since you checked that?
That way you know where the phone is when you get messages or calls. It's always funny to me when the phone rings and someone yells, "Phone!" That's why it rings in the first place.
...........yes.
:P
The first thing that ppl worry about after a building collapse is finding their mobile phones
(come on, i know MY mobile is more important to me that human life!!)
What about children, I know mine can be quite distracting.
That's why cars have trunks.