© 2024 EasyEDA Some rights reserved ISO/IEC
1.Easy to use and quick to get started
2.The process supports design scales of 300 devices or 1000 pads
3.Supports simple circuit simulation
4.For students, teachers, creators
1.Brand new interactions and interfaces
2.Smooth support for design sizes of over 5,000 devices or 10,000 pads
3.More rigorous design constraints, more standardized processes
4.For enterprises, more professional users
STD signal jammer advanced
Mode: Editors' pick
Communication jamming devices were first developed and
used by military. This interest comes from the fundamental objective
of denying the successful transport of information from the sender
(tactical commanders) to the receiver (the army personnel), and viceversa. Nowadays, mobile (or cell) phones are becoming essential tools
in our daily life. Here in Jordan, for example, with a rather low
population (around 5 million), three main cell phone carries are
available; namely; the first two use the GSM 900 system, while the
third uses the GSM 1800 system. Needless to say, the wide use of
mobile phones could create some problems as the sound of ringing
becomes annoying or disrupting. This could happen in some places like
conference rooms, law courts, libraries, lecture rooms and mosques.
One way to stop these disrupting ringings is to install device in such
8
places which will inhibit the use of mobiles, i.e., make them obsolete.
Such a device is known as cell phone jammer or "GSM jammer", which
is basically some kind of electronic countermeasure device.
The technology behind cell phone jamming is very simple. The
jamming device broadcasts an RF signal in the frequency range
reserved for cell phones that interferes with the cell phone signal,
which results in a "no network available" display on the cell phone
screen. All phones within the effective radius of the jammer are
silenced. It should be mentioned that cell phone jammers are illegal
devices in most countries. According to the Federal Communications
Commission (FCC) in the USA: "The manufacture, importation, sale, or
offer for sale, of devices designed to block or jam wireless
transmissions is prohibited". However, recently, there has been an
increasing demand for portable cell phone jammers. We should
mention that this project, presented in this report, is solely done for
educational purposes. There is no intention to manufacture or sell
such devices in India, or elsewhere. In this project, a device that will
jam both GSM 900 and GSM 1800 services will be designed, built, and
tested.
ID | Name | Designator | Quantity |
---|---|---|---|
1 | VDD | #PWR1 | 1 |
2 | 4.7 pF | C1 | 1 |
3 | 3.3pF | C2 | 1 |
4 | 47pF | C3 | 1 |
5 | 2pF | C4 | 1 |
6 | 4.7pf | C5 | 1 |
7 | 30pF | C6 | 1 |
8 | 1.1nH | L1,L2 | 2 |
9 | LED | LED1 | 1 |
10 | 2N2222 | Q1 | 1 |
11 | 82k | R1 | 1 |
12 | 6.8k | R2 | 1 |
13 | 10k | R3 | 1 |
14 | 220 | R4 | 1 |
15 | 5.6K | R5 | 1 |
16 | 3.9k | R6 | 1 |
17 | NE555P | U1 | 1 |
18 | 12v | V1 | 1 |
19 | Multimeter | XMM1,XMM2 | 2 |
20 | Oscilloscope | XSC1,XSC2 | 2 |
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