mobile jammer

[san]

im planning to do a mobile bug along with a mobile jammer as my mini
project.. can anyone tell me how to do a mobile jammer? does any1 hav
its circuit???

 

[D from BC]

im planning to do a mobile bug along with a mobile jammer as my mini
project.. can anyone tell me how to do a mobile jammer? does any1 hav
its circuit???

Sure you don't want to make a safe LED blinker?

from
http://electronics.howstuffworks.com/cell-phone-jammer5.htm
"
The Federal Communications Commission is charged with enforcing
jamming laws. However, the agency has not yet prosecuted anyone for
cell-phone jamming. Under the U.S. rules, fines for a first offense
can range as high as $11,000 for each violation or imprisonment for up
to one year, and the device used may also be seized and forfeited to
the government.
"

Jamming in movie theatres would be nice.
It can be announced right on the big screen..
YOUR PHONES ARE NOW BEING JAMMED!

Question is: Would lots of people leave?

D from BC
British Columbia
Canada.

 

[Frank Raffaeli]

Sure you don't want to make a safe LED blinker?

fromhttp://electronics.howstuffworks.com/cell-phone-jammer5.htm
"
The Federal Communications Commission is charged with enforcing
jamming laws. However, the agency has not yet prosecuted anyone for
cell-phone jamming. Under the U.S. rules, fines for a first offense
can range as high as $11,000 for each violation or imprisonment for up
to one year, and the device used may also be seized and forfeited to
the government.
"

Jamming in movie theatres would be nice.
It can be announced right on the big screen..
YOUR PHONES ARE NOW BEING JAMMED!

Question is: Would lots of people leave?

D from BC
British Columbia
Canada.

The movie theater near my home in Austin, Texas threatens an Ass-
whoopin if patrons don't silence their phones. The theater is always
packed.

Frank

 

[san]

hey thanks...

im from india.. it is not banned in our country.. so i guess i wont
get any punishment.. im not planning to use it inside a theatre im
planning to use it inside an examination hall!!

 

[[email protected]]

im planning to do a mobile bug along with a mobile jammer as my mini
project.. can anyone tell me how to do a mobile jammer? does any1 hav
its circuit???

You can proberbly just send some burst at ~900 MHz (check exact frequency)
with some time intervalls to jam the cellphones. And with little power aswell.

 

[mpm]

hey thanks...

im from india.. it is not banned in our country.. so i guess i wont
get any punishment.. im not planning to use it inside a theatre im
planning to use it inside an examination hall!!

You are from India, or located in India.
Do not make or use one of these in the United States.
It's illegal.

I personally believe it is also unethical to use such a device.
You don't know if you'll be causing harm (i.e. a doctor who forgets to
put his phone in vibrate).
It happens. Your desire not to be bothered by a cell phone ring is
likely inconsequential to the harm that might occur.

 

[Wimpie]

hey thanks...

im from india.. it is not banned in our country.. so i guess i wont
get any punishment.. im not planning to use it inside a theatre im
planning to use it inside an examination hall!!

Hello San,

Why not putting several simple AC diode detectors with LF
amplification at the examination hall (assuming GSM or other pulsed
digital system)?

It is not a guarantee (for non-ringing phones) because the cell phone
may not connect to the base station frequently, but an illegal call or
SMS will be detected. When placing many of such devices, you can have
some estimate of where the transmitting cell phone is.

Best regards,

Wim

 

[Michael A. Terrell]

You can proberbly just send some burst at ~900 MHz (check exact frequency)
with some time intervalls to jam the cellphones. And with little power aswell.

Gee, and you make it sound SO easy!


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[maxfoo]

You can proberbly just send some burst at ~900 MHz (check exact frequency)
with some time intervalls to jam the cellphones. And with little power aswell.

Get a PLL/VCO chip from Analog Devices or National Semiconductor. You'll need a
microcontroller to send the 96 or longer bit word to set the N, R counters.
Then design a wide loop filter to modulate the vco with pseudorandom noise.
Then add a hefty output rf amplifier...and you're good to go!...That was easy!

 

[JosephKK]

hey thanks...

im from india.. it is not banned in our country.. so i guess i wont
get any punishment.. im not planning to use it inside a theatre im
planning to use it inside an examination hall!!

So what system and band do the cell phones use there?

 

[JosephKK]

You are from India, or located in India.
Do not make or use one of these in the United States.
It's illegal.

I personally believe it is also unethical to use such a device.
You don't know if you'll be causing harm (i.e. a doctor who forgets to
put his phone in vibrate).
It happens. Your desire not to be bothered by a cell phone ring is
likely inconsequential to the harm that might occur.

I expect more like to reduce cheating, which has become very profitable.

 

[Nico Coesel]

im planning to do a mobile bug along with a mobile jammer as my mini
project.. can anyone tell me how to do a mobile jammer? does any1 hav
its circuit???

Google may help you. But in many countries operating such a device is
considered a severe crime. So you may end up in jail. If someone gets
an heart-attack and dies because your device was making it impossible
to dial emergency services you may find yourself involved in a long
civil lawsuit which propbaly results in you having to give all your
money to someone else for the rest of your life.

 

[BobG]

Wait a minute. If the doctor gets the call in the theater, how does
that increase the heart attack victim's chance of survival? Isn't that
more dependent on the quickness of the first responders? If the doctor
says, 'Well, I was in the movies and my phone didn't ring' how does
that imply there was a jammer in the theater?
Pretty long stretch so far.

 

[PeterD]

Wait a minute. If the doctor gets the call in the theater, how does
that increase the heart attack victim's chance of survival? Isn't that
more dependent on the quickness of the first responders? If the doctor
says, 'Well, I was in the movies and my phone didn't ring' how does
that imply there was a jammer in the theater?
Pretty long stretch so far.

Backwards thinking...

Try it this way: Jack and Jill are in the theater enjoying a thrilling
DIsney movie. Jack has a heart attack just as the cute rabbit is about
to be (rightfully) blown away. Jill, tries to call emergency services
but her cell phone won't work...

Jill won't leave her husband, but the nice lady (named "Blondie") says
she'll go find a phone and call an ambulance. Blondie remembers that
the phone in her apartment works, so she goes home and calls. Sadly
her apartment is about 25 minutes from the theater.

In the meantime, Jack dies.

Jill never was able to call 911.

And Bob, the theater owner who had the (now discovered) cell phone
blocker, is facing a really expensive law suit.



THings were so much simpler back in 1921 when we didn't have cell
phones. Just think, back then we'd have been able to save Blondie from
driving all the way home just to make that call...

 

[JeffM]

[...]in the theater[...]Jack has a heart attack[...]
Jill, tries to call emergency services but her cell phone won't work

[...]nice lady (named "Blondie") says she'll go find a phone
and call an ambulance[...]
In the meantime, Jack dies.

It's been a long time since I was willing
to have my feet stick to the floor of a movie theatre.
Aren't there pay phones in the lobby any more?

 

[Michael A. Terrell]

[...]in the theater[...]Jack has a heart attack[...]
Jill, tries to call emergency services but her cell phone won't work

[...]nice lady (named "Blondie") says she'll go find a phone
and call an ambulance[...]
In the meantime, Jack dies.

It's been a long time since I was willing
to have my feet stick to the floor of a movie theatre.
Aren't there pay phones in the lobby any more?

Haven't you noticed? The cell phone has nearly exterminated the pay
phone industry.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Rich Grise]

.

It happens. Your desire not to be bothered by a cell phone ring is
likely inconsequential to the harm that might occur.

Oh, feh. Somebody misses a stupid phone call, and somebody dies as
a consequence? If somebody's job is that important, they shouldn't
be going to the movies while they're on duty.

Cheers!
Rich

 

[Rich Grise]

Google may help you. But in many countries operating such a device is
considered a severe crime. So you may end up in jail. If someone gets an
heart-attack and dies because your device was making it impossible to dial
emergency services you may find yourself involved in a long civil lawsuit
which propbaly results in you having to give all your money to someone
else for the rest of your life.

If somebody's going to die over a stupid phone call, then that person
shouldn't have been sitting in the movie theater when they're on duty.

Cheers!
Rich