Electronic Circuits Schematics Projects




Jammer Circuits


Radio jamming is the (usually deliberate) transmission of radio signals that disrupt communications by decreasing the signal to noise ratio. Unintentional jamming occurs when an operator transmits on a busy frequency without first checking whether it is in use, or without being able to hear stations using the frequency.

Another form of unintentional jamming occurs when equipment accidentally radiates a signal, such as a cable TV plant that accidentally emits on an aircraft emergency frequency. The concept can be used in wireless data networks to disrupt information flow.[1] It is a common form of censorship in totalitarian countries, in order to prevent foreign radio stations in border areas from reaching the country.
 
Radar jamming and deception is the intentional emission of radio frequency signals to interfere with the operation of a radar by saturating its receiver with noise or false information. There are two types of radar jamming: Mechanical and Electronic jamming.
 
As with other radio jamming, cell phone jammers block cell phone use by sending out radio waves along the same frequencies that cellular phones use. This causes enough interference with the communication between cell phones and towers to render the phones unusable. On most retail phones, the network would simply appear out of range. Most cell phones use different bands to send and receive communications from towers (called frequency division duplexing, FDD). Jammers can work by either disrupting phone to tower frequencies or tower to phone frequencies. Smaller handheld models block all bands from 800MHz to 1900MHz within a 30-foot range (9 meters).
 
Use wisely those circuits, because it is illegal to operate jamming devices.
 
 
High Power Portable TV and FM Jammer circuit New

There are still neighbors that keep annoying you by having loud the TV or the radio? Well I have you the solution. In fact all neighborhood will face your jamming waves at their TVs and radios, so be careful. This Jammer is the improved version of the old "TV and FM jammer schematic" with the difference of much higher power. Many of you where asking for a stronger and wider effect but to be as portable as can be. Looking at the schematic you can see that, only the.....


Views: 5 | Votes: 1 | Comments: 0 | Rating: 7 | Rank: 9 | Added: May 21, 2013 |
High power mobile phone Jammer circuit

If we are speaking about professional Cell phone Jammers we are talking about this schematic below. First off all you should be very careful how to use this device. Its fully illegal and so the purpose I post this Circuit is only for educational and testing reasons. This type of device is being used by security for VIPS, specially at their limousines to avoid bomb triggering while the car passes from the target cell phone-bomb. Offcourse there are those who use it to make.....


Views: 2385 | Votes: 8 | Comments: 0 | Rating: 8.125 | Rank: 10 | Added: Mar 29, 2013 |
TV and FM jammer schematic

The Jammer is a very small circuit and can fit inside a small plastic box with 9V battery inside. It can be very illegal if you attach an external antenna so don't. adjust frequency by turning trimmer. It is intended only as a practical joke device. The Capacitor is 6-10pf air capacitor and the transistor used here is the 2n2222. ..


Views: 742 | Votes: 5 | Comments: 42 | Rating: 9.6 | Rank: 10 | Added: May 13, 2012 |
GPS Jammer with PIC16F870

GPS trackers as GPS vehicle tracking and person monitoring tracking can be used in a good way but sometimes they are used in bad way. These tracker units monitor the exact location of you, and then deliver that information to a second part. If you don’t want your location is track able then GPS jammer will take care of that...


Views: 2288 | Votes: 54 | Comments: 0 | Rating: 1 | Rank: 0 | Added: Mar 20, 2013 |
TV remote control Jamming circuit

Just point this small device at the TV and the remote gets jammed . The circuit is self explanatory . 555 is wired as an astable multivibrator for a frequency of nearly 38 kHz. This is the frequency at which most of the modern TVs receive the IR beam . The transistor acts as a current source supplying roughly 25mA to the infra red LEDs. To increase the range of the circuit simply decrease the value of the 180 ohm resistor to not less than 100 ohm. It is required to.....


Views: 2226 | Votes: 102 | Comments: 0 | Rating: 4 | Rank: 0 | Added: Mar 11, 2013 |
Phone Jammer linear amplifier

RF Power Amplifier 1 Watt. Jams Cellular Downlink Band: 800-950 MHz...


Views: 5111 | Votes: 26 | Comments: 0 | Rating: 9 | Rank: 0 | Added: Mar 9, 2013 |
Infrared Remote Control Jammer circuit

The IR Jammer is a fun project that provides a bit of safe, non-destructive fun. The Infrared Remote Control Jammer allows you to render all IR remote controls inoperative! The microcontroller in this design allows for all 6 of the main IR frequencies to be targeted making this unit universal. It works by corrupting the data that is being sent by your normal remote controls. A single press of the button sends out stream of IR pulses from the two narrow beam and two wide.....


Views: 4991 | Votes: 80 | Comments: 0 | Rating: 9 | Rank: 0 | Added: Mar 5, 2013 |
Cell phone signal jammer

The working principle of mobile phone jammers, the circuit structures are figured out. Electronic lovers, just to find out later works can be arbitrary, and then look at the design and also make a try, very easy to use, special write this article the design of the production process will tell my friends who are interested. Works with the sawtooth control voltage controlled oscillator, so that the work generated frequency sweep signal, each sweep cycle, equal to the work.....


Views: 5587 | Votes: 41 | Comments: 0 | Rating: 7 | Rank: 0 | Added: Feb 14, 2013 |
A Perfect Jammer

This is a simple add-on adapter for any Family Radio Service (FRS), amateur, or two-way radio transceiver with a microphone/Push-to-Talk (PTT) and external earphone/speaker interface. It will turn the transceiver into a co-channel jammer. That is, a jammer which can only jam a single frequency upon the detection of any "activity" on that particular frequency. This type of circuit is also commonly referred to as a Carrier Operated Relay (COR). This is the perfect type.....


Views: 2739 | Votes: 87 | Comments: 0 | Rating: 1 | Rank: 0 | Added: Jan 23, 2013 |
Remote Control Jammer

This circuit confuses the infra-red receiver in a TV. It produces a constant signal that interferes with the signal from a remote control and prevents the TV detecting a channel-change or any other command. This allows you to watch your own program without anyone changing the channel !! The circuit is adjusted to produce a 38kHz signal. The IR diode is called an Infra-red transmitting Diode or IR emitter diode to distinguish it from a receiving diode, called an IR.....


Views: 4255 | Votes: 32 | Comments: 0 | Rating: 1 | Rank: 0 | Added: Jan 15, 2013 |
IR Remote Control Jammer

Don't like your little brother's TV channel selection? Hate the volume your wife sets the stereo at? Want to just annoy someone? This circuit does all that and more by jamming most IR remote signals. The circuit releases a flood of pulsing IR light that confuses the reciever by corrupting the data stream...


Views: 964 | Votes: 28 | Comments: 0 | Rating: 4 | Rank: 0 | Added: Jan 12, 2013 |
TV VCR remote Jammer

Just point this small device at the TV and the remote gets jammed . The circuit is self explanatory . 555 is wired as an astable multivibrator for a frequency of nearly 38 kHz. This is the frequency at which most of the modern TVs receive the IR beam . The transistor acts as a current source supplying roughly 25mA to the infra red LEDs. To increase the range of the circuit simply decrease the value of the 180 ohm resistor to not less than 100 ohm. It is required to adjust.....


Views: 1862 | Votes: 37 | Comments: 0 | Rating: 4 | Rank: 0 | Added: Nov 22, 2012 |
Mobile cellphone jammer

This cell phone jammer is not applicable for use in Europe, Middle East, nor Asia. The GSM jammer circuit could block mobile phone signals which works on GSM1900 band, also called DCS. For more cell phone jammers check the related posts...


Views: 5448 | Votes: 77 | Comments: 0 | Rating: 0 | Rank: 0 | Added: Nov 1, 2012 |
High power Valve Russian Jammers

These photos were made in the years 1956 and 1957. On photo nr. 3, on the right, at the bottom, is the GMD. The work that was done at the objekt was of course top secret. It was strictly forbidden to talk to any acquaintance or relative about the work. Needless to say, photographing the objekt was just as strictly forbidden. Getting caught could have brought with it a 25 year prison sentence. Nevertheless, we took pictures, talked about our work, and sometimes, at night,.....


Views: 2675 | Votes: 59 | Comments: 0 | Rating: 8 | Rank: 0 | Added: Oct 21, 2012 |
Mobile phone Jammer

A reference schematic, not been built...


Views: 3165 | Votes: 29 | Comments: 0 | Rating: 3 | Rank: 0 | Added: Oct 17, 2012 |
Variable GPS Jammer

A low cost device to temporarily disable the reception of the civilian coarse acquisition (C/A) code used for the standard positioning service (SPS) on the Global Positioning System (GPS/NAVSTAR) L1 frequency of 1575.42 MHz. This is accomplished by transmitting a narrowband Gaussian noise signal, with a deviation of +/- 1.023 MHz, on the L1 GPS frequency itself. This technique is a little more complicated than a simple continuous wave (CW) jammer, but tends to be more.....


Views: 1557 | Votes: 51 | Comments: 0 | Rating: 8 | Rank: 0 | Added: Sep 28, 2012 |
800 MHz Cellular Phone Jammer

This is a simple little 800 MHz band cellular phone jammer which can be easily built from commonly available parts. Most homebrew cellular phone jammers are based around a sweeping RF oscillator which, while more "jamming" efficient, can be quite difficult for the beginner to construct without access to expensive RF test equipment. This project can also be used to help take the load off certain people who receive 15 million emails a day from strangers asking them how to.....


Views: 3703 | Votes: 55 | Comments: 0 | Rating: 0 | Rank: 0 | Added: Jul 29, 2012 |
Cellular Phone Jammer

RF input about +10 dbm. Preamp. Main Amplifier. RF output nominal ~ +33dbm (max ~ 3.2 W). Also you can see the FB going to contact (3) so you only have to solder a small FB to contact (2). Cut the PCB like in the picture 4 or 5. The amplifier from old Siemens Cellphone work well with the VCO. The VCO POS1060 does 1 Mhz bandwich there are new products out making much more bandwich possible RF Power is adj. on the 2k2 linear resistor ( 400mA current. @ 5V )...


Views: 228 | Votes: 75 | Comments: 0 | Rating: 8 | Rank: 0 | Added: Jul 27, 2012 |
InfraRed Jammer with 555

Here is the circuit diagram of simple but highly effective TV remote jammer circuit. Most of the TV remotes have 38KHz operating frequency. A flood of IR beams in the same frequency can easily confuse the TV receiver and this is the operating principle of our jammer. The circuit is nothing but an astable multivibrator based on NE555 IC. The output of NE555 is amplified using a PNP transistor SK100 to drive the IR LEDs. Not only TV remotes, but any IR remotes operating in.....


Views: 5159 | Votes: 60 | Comments: 0 | Rating: 5 | Rank: 0 | Added: Jun 23, 2012 |
Noise Jammer for GPS

A Noise Jammer for GPS 1575.42 MHz...


Views: 159 | Votes: 16 | Comments: 0 | Rating: 0 | Rank: 0 | Added: Jun 22, 2012 |
 
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Hi all I wanted to know the theory behind a frequency jammer circuit. How does it jam frequencies I know that it emits certain frequency that cancels.

This circuit confuses the infra-red receiver in a TV. It produces a constant signal that interferes with the signal from a remote control and prevents the TV detecting a channel-change or any other...

Here is a Tv remote jammer circuit, using NE555 timer IC. By using this you can watch your favorite TV channel without any interruptions. Ie; No one can be able to change the channel by means of re...

Circuit displaying a cell phone jammer.Here i have used a fm transistor for making this circuit.Mobile cellphones are working in 450 MHz frequency .Here the transmitter generate virtually equal to ...

A beautiful diy gsm jammer or mobile cell phone jammer schematic diagram for use only in GSM1900 with frequency from 1930 MHz to 1990 MHz. The GSM1900 mobile phone network is used by USA, Canada an...

Here is the circuit diagram of simple but highly effective TV remote jammer circuit. Most of the TV remotes have 38KHz operating frequency. A flood of IR beams in the same frequency can easily conf...