mobile phone jammer

Status
Not open for further replies.
S

sai babu

New Member
I want to buid a mobile jammer
for my college project.I need
ciruit digram and information
about it.So plzzz plzzz!!
help me and give me information as earlier as possible.
power_creators @ yahoo.com
 
Someone Electro said:
you need to transmit a signal at 900MHz if you are europe.The USA uses difrent freq.
Click to expand...
In big cities it is 900,1800 and newest 1900, Also some old Analog NMT phones work on 450Mhz
 
O corection 800Mhz in europe.Sory


My dad had to go on an trip at work in the USA and he codnt use his phone (it had 800 only)

YAY they just caled me that they just got my motorola mobile phone fixed (GPRS didnt work)
 
lordsathish said:
is it possible to jam a phone or find its location ? any idea?
Click to expand...

The telecoms companies can tell roughly where the phone is, by which cell's it's in contact with, and the relative signal strengths. There's no way you can!.

Apparently some top-end phones include GPS, which broadcasts their 'exact' location.

UK phones are tri-band, so you would need to jam fairly large chunks of RF bandwidth, which would jam all phones, not just one.
 
It has been designed before and there are many patents. Try searching for patents if you want circuit designs. The only real way to jam a mobile is to jam the entire band by emitting a high level broardband white noise. Phones are always switching the channel they are on, so you need to jam everything, or all the links will just adapt around the noise.

What you want to do is ILLEGAL, even if you do complete it there is no legal way for you to test your design.

DO NOT try to jam phone signals using high power broardband noise generators, there are many reasons why it is illegal, the most important being is that you will jam all communications, Including all 999 calls. I sure you don't want someones death on your concience.
 
I had a badly sparking fan that brought me a visit from the RF cops. Its broadband interference jammed just about everything! :lol:
 
Though I have never done it, I have read that you need to broadcast an OUT OF SERVICE message in each of these frequencies. This way you do not have to jam the phones, just fool them while they are close to your transmitter.
 
audioguru said:
I had a badly sparking fan that brought me a visit from the RF cops. Its broadband interference jammed just about everything! :lol:
Click to expand...

RF cops are pretty active up there in Canada, eh? I remember that other guy that had them goin down the street with a big dipole on the roof :lol:
I dont think the FCC does squat here :lol:
 
My 120V electric drill sparks badly too. You can have it if you replace it.
But you are very, very far away from me. :lol:
 
Discharging big capacitators in wery low resistance coils makes radio waves the mess up things. (interfers whith TVs a lot)
 
It's the magnitic field collapseing that cause the interferance, you need to charge the coil and then cut the power to cause the most interferance. you can cut the power much much faster than you can charge a coil up.

We have used drills at work before to test the integrety of our devices.
 
Status
Not open for further replies.

Similar threads

  • Question
Batteries overheating in Cordless House Phone
2
Replies
21
Views
2K
vidalv
V
Z
  • Question
Newbie trying to repair a mobile phone
Replies
2
Views
11K
Zant
Z
  • Question
Phone Charger Strange Noise
Replies
6
Views
1K
Dr_Doggy
S
  • Locked
  • Question
bluetooth jammer
Replies
2
Views
3K
JimB
  • Question
Charger Noise when unplugged
Replies
7
Views
2K
Nigel Goodwin
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…