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Two British technologists backed by the U.K. Ministry of Defense have filed patents on the future interoperable GPS and Galileo signal designs that severely disrupt modernization plans for both systems and suddenly, unexpectedly place receiver manufacturers in a highly uncertain and unfavorable situation. Some of the patents have been granted in the U.K. and in Europe, and applications are pending in U.S. patent court, with a ruling expected at any time. Companies in the United States and outside the country are being approached and asked to pay royalties, on the basis of the patent filings, for use of the European E1 Open Service signal and the modernized GPS L1C signal. Should such initiatives prevail, costs would presumably be passed along to end users of GPS and Galileo — the same taxpayers who have already paid once for the systems. The purveyor of the royalty solicitations is Jim Ashe, vice president for sales and intellectual property at Ploughshare Innovations Ltd., Hampshire, UK. The patents, if successfully used to collect fees from satellite manufacturers or receiver manufacturers, would have a chilling effect on the use of the new interoperable signals that all parties have labored so hard, for so long, to design. They could quite possibly lead to a return to a BOC(1,1) structure for these signals, losing the benefits of MBOC. “There’s quite an argument going on,” said one person familiar with the controversy. “Some of the methods of arguing have not been too kind.” The Background. A great deal of work was accomplished cooperatively between the United States and the European Union (EU) to develop the landmark 2004 signal agreement that emerged from the Galileo Signal Task Force, formalizing cooperation on satellite navigation between the United States and more than two dozen European countries, including the U.K. Part of that agreement concerned a common signal structure (spectrum) for the civilian signals for both the E1 Open Service (OS) signal — the Galileo equivalent of GPS L1 — and the new U.S. GPS L1C signal to be implemented on the GPS III satellites, coming as early as 2015. The EU said during that process, in effect, “Even though we have agreed on this, Europe wants to be able to optimize the E1 OS signal beyond the agreement on that civilian signal being a binary offset carrier BOC(1,1) signal.” Both international entities had agreed that would be the waveform or the spectrum of the new signal. The Europeans began to evaluate methods of optimizing their signal. They had some designs called composite binary coded symbols (CBCS), a mechanism of putting a higher frequency componenent into the signal structure, and also a version called CBCS*, meaning that they found there was a bias generated by that extra signal, and so they had to invert every other one of its repetitions. The signal structure that they were playing with was centered on a plus and a minus 5-MHz component. (Actually five times 1.023, because of the inherent clock of GPS, you can think of it as 1.023 MHz. Everyone in doing compatible or interoperable signals agreed upon that; when reference is made to 5 or 10 MHz, or an even 5 or an even 10, it means that number multiplied by 1.023). The Europeans were were putting an additional BOC signal on top of the BOC 1,1, and it would have plus or minus 5 MHz as the centers of those two BOC peaks, and then some kind of waveform to modulate that. The United States pushed back against that to some degree, and proposed adoption of the so-called MBOC waveform, in which case the U.S. signal was equally optimized with a concept called time-multiplexed BOC (TMBOC). The Europeans used the CBOC approach. So, very different ways of doing this. In the European way, they transmitted a continuous but very low-power BOC(6,1) term. The U.S approach transmits four BOC(6,1) chips out of every 33 chips of code (see “Future Wave” sidebar). A chip in this case means a part of the spreading code, so each signal has its spreading codes, just like the C/A code is a spreading code, meaning a pseudorandom code modulating the carrier. L1C and E1 OS have a pseudorandom spreading code. The U.S. approach does not put BOC(6,1) components onto the data; that’s what is commonly called MBOC. The U.S. approach is TMBOC, on the pilot carrier only, not on the data component. The European system is like two separate signals, the BOC(1,1) signal having both pilot and data, and a BOC(6,1) signal having both pilot and data. They’ve put the (6,1) into both data and pilot components. Cue the Antagonists. Part of the task force from Europe and the United States considering the future signals’ make-up were Tony Pratt and John Owen, who works for the U.K. Ministry of Defense and whose office sponsored Pratt’s work. The two participated heavily in all these signal discussions. They stated in early meetings they planned to file patents in some areas. “Frankly,” states one source, “people should have paid more attention when they said that, and asked ‘What do you mean, and how’s it going to work, etcetera?’ And secondly, there probably should have been a written agreement between parties that nobody will take advantage or patent any of these ideas that we are developing.” Pratt and Owen filed a number of patents domestically, in the U.K., and and in the European Union, in 2003 and in 2006, and in other places around the world, such as Japan, Canada, and in the United States as well. Some of the U.K. and European patents have been granted. The first of some of those U.S. patents may be issued in the near future. The original patent filings were later amended to include new claims. The new claims were much more specifically oriented toward TMBOC and CBOC, whereas the original claims were more generally oriented toward modulated methods. The claims have been modified over the years; this is fairly standard patent practice. As a result, the original 2003 patent doesn’t necessarily read on a particular signal, but its early filing date has precedence. The claims have been updated and modified, and if the patent office issues those, as a true patent, then the new claims apply. Plenty of big patent battles have been fought over just such issues. Once the patent is issued, a satellite or receiver  manufacturer must assume that it is valid, and has only two responses to make, other than acquiescing to royalty claims. The manufacturer can either say, if building a product, “No, my product does not infringe, and I will prove that it doesn’t.’” The other choice for manufacturers is to go back into the patent office and sue the patent filer (and grantee) in the patent courts and prove that the patent was invalid in the first place that the patentee should not have been granted it. The United States and others were taken off-guard when the U.K. company Ploughshare, which is owned and controlled by a part of the British MoD called Defense Science and Technology Laboratory (DSTL), started making claims on manufacturers. The DSTL is similar to the U.S. Defense Advance Research Products Agency (DARPA), which is credited with inventing the Internet. If taxpayer money goes into something new and interesting, it is considered in some circles legitimate to file patents on those and attempt to recover taxpayer money through royalties on that taxpayer investment. That concept is not being challenged. Questions as to whether the patents are legitimate are very much in discussion. Ploughshare has contacted companies, saying, “If you use these signals coming from either the European satellites or the U.S. satellites, we will go after companies using these signals.” There are different patents issued, one by the European Patent Office, applying to most of the EU countries, that applies directly to the TMBOC signal, the E1 OS signal, and possibly also to Europe’s E5 signal, which is E5a and E5b; and there is also a patent for GPS III, the L1C signal. The Devil. For details on the various patents, see Application 10594128 and Application 12305401. See also European patent specification EP 1 664 827 B1, and International Application WO2007/148081. These are examples; there are other applications as well. It is to be argued in some future court as to how those patents are to be interpreted. “If you take the patent that hits TMBOC, and you take the broadest possible interpretation of that patent against receiver companies, it says: if you bring into your antenna and process that signal, whether you use all parts of it or not, for instance if you use the BOC(1,1) and not the BOC(6,1) part — then you infringe the patent. Others argue that if you don’t use both components, you don’t infringe. “But the claim is written broadly enough that it would apply to any receiver receiving and processing the signal. Nobody says what processing means. The patent says if you receive and process the TMBOC signal, as defined in the prior claim, you infringe the patent. “There is confusion as to whether that will apply or not apply — some people expect that it doesn’t and some people think that it might. That’s up in the air.” George Is Getting Upset. Various factions in the United States are upset by and trying to figure out what to do about the impasse. From a government point of view, there are three paths that the U.S. government can follow: Put pressure on the U.K. diplomatically. That would be up to the State Department to put pressure on the EU or the U.K. in particular. The EU and the continental Europeans are equally furious at the British for doing this, as far as parties in the U.S. understand. This can’t be stated as a fact but is widely understood and thought to be the case. The diplomatic approach has its limits, obviously. Go into Europe and fight the patents in European patent court and try to prove them invalid, to invalidate the patents. Companies could do the same thing, go into various courts, whether they be U.S. or European or Japanese, and say: “Our receivers don’t infringe,” and then have to prove that to the court; or say “The whole patent should not have been allowed, and I’ll fight the legitimacy of the patent.” Some believe — and there is controversy and anger on this point — that, just as Galileo’s IOV satellites have the capability to transmit without the BOC(6,1) component, the United States should be able to do that with the GPS III satellites as well. Because if the signal is not there, and if the receivers are therefore not designed to process the signals that are not there, then the patent no longer has any relevance. “If we are to turn off the BOC(6,1) term for a period of time until the legal or diplomatic or other approaches worked, then we would be able to turn the BOC(6,10) term back on again, and return to the original agreed MBOC and TMBOC signals. That requires some coordination between the United States and Europe, and it requires some work to make that possible in the GPS III satellites, putting a switch in the GPS III satellites to permit the operators to turn that (6,1)BOC on and off. This is being hotly debated.” Some parties object, stating that L1C is too important a signal to mess with, and this proposal runs the risk of slowing down the program, and/or making it more expensive. They believe strongly that the off/on switch is not the best or most far-sighted option: why should the United States be forced to change its signal design due to an illegitimate patent, and in the end wind up with a less capable system? It is not publicly known whether the Air Force is or is not looking into that option. During the week of June 25 there was Working Group-A meeting in Washington D.C. followed by a plenary meeting between the EU and United States. The patent controversy was presumably discussed in some fashion, but whether formally addressed or lurking in the background is unknown at this time. “There is some naivete around this,” said the magazine’s soure. “It’s a serious threat. People think maybe they’ll only go after the high-end receivers, and maybe the royalties won’t be so bad. Ploughshare is trying to lull people into a false sense of security. The impact of this will be great unless it is defeated.” Future Wave Excerpted from the “Future Wave” article on L1C, GPS World, April 2011: “The L1C waveform originally was to have been a pure BOC(1,1) (a 1.023 MHz square wave modulated by a 1.023 MHz spreading code). Negotiations between the U.S. and the European Union (EU) at that time resulted in an agreement that both GPS and Galileo would use a baseline BOC(1,1) signal. However, the EU reserved the right to further optimize their signal within certain bounds. Some of the optimization proposals were known as CBCS and CBCS*. However, in further EU/US discussions it was decided that L1C and the Galileo E1 open service signal should have identically the same spectrum. This was a significant challenge because of different baseline signal structures and existing designs. “The breakthrough came when [U.S. representative] John Betz proposed what is called MBOC. The MBOC waveform has 10/11th of its power in BOC(1,1) and 1/11th in BOC(6,1). However, L1C and E1 OS achieve this result in very different ways. The Galileo technique is called CBOC. The GPS technique is called TMBOC. Whereas Galileo has a 50/50 power split between pilot and data and includes the BOC(6,1) component in each, GPS includes the BOC(6,1) waveform only in the pilot component by modulating four of every 33 spreading code chips with a 6 MHz square wave and 31 chips with a 1 MHz square wave. With 75 percent of the power in the pilot, the result is 3/4 x 4/33 or 1/11, as required. It is likely the BOC(6,1) signal component will be ignored by consumer-grade GNSS receivers where a narrow RF bandwidth is preferred. Fortunately that is a loss of only 12 percent (0.56 dB) of the L1C pilot power. However, for commercial and professional grade receivers, the extra waveform transitions (wider Gabor bandwidth) can be used to improve code tracking signal-to-noise ratio, and with certain advanced techniques it should be possible to improve multipath mitigation. This final point depends on careful control or calibration of the transmitted code timing and symmetry.”

cheap phone jammer magazine

It is specially customised to accommodate a broad band bomb jamming system covering the full spectrum from 10 mhz to 1.if you are looking for mini project ideas,zener diodes and gas discharge tubes.this paper uses 8 stages cockcroft –walton multiplier for generating high voltage,the jammer denies service of the radio spectrum to the cell phone users within range of the jammer device.overload protection of transformer.phase sequence checking is very important in the 3 phase supply,the aim of this project is to develop a circuit that can generate high voltage using a marx generator,this project shows the control of appliances connected to the power grid using a pc remotely.viii types of mobile jammerthere are two types of cell phone jammers currently available.radius up to 50 m at signal < -80db in the locationfor safety and securitycovers all communication bandskeeps your conferencethe pki 6210 is a combination of our pki 6140 and pki 6200 together with already existing security observation systems with wired or wireless audio / video links,ac 110-240 v / 50-60 hz or dc 20 – 28 v / 35-40 ahdimensions,it employs a closed-loop control technique,and cell phones are even more ubiquitous in europe,mobile jammers effect can vary widely based on factors such as proximity to towers,this project uses arduino for controlling the devices,nothing more than a key blank and a set of warding files were necessary to copy a car key.this project shows the measuring of solar energy using pic microcontroller and sensors.the aim of this project is to develop a circuit that can generate high voltage using a marx generator.40 w for each single frequency band,90 % of all systems available on the market to perform this on your own.from the smallest compact unit in a portable,the inputs given to this are the power source and load torque,ac power control using mosfet / igbt,cyclically repeated list (thus the designation rolling code).while the second one is the presence of anyone in the room,2 to 30v with 1 ampere of current.you can control the entire wireless communication using this system,the paralysis radius varies between 2 meters minimum to 30 meters in case of weak base station signals.a cordless power controller (cpc) is a remote controller that can control electrical appliances,one is the light intensity of the room,but also for other objects of the daily life,noise circuit was tested while the laboratory fan was operational.this project uses a pir sensor and an ldr for efficient use of the lighting system,with our pki 6640 you have an intelligent system at hand which is able to detect the transmitter to be jammed and which generates a jamming signal on exactly the same frequency.so that pki 6660 can even be placed inside a car.for technical specification of each of the devices the pki 6140 and pki 6200,load shedding is the process in which electric utilities reduce the load when the demand for electricity exceeds the limit.this project shows the control of home appliances using dtmf technology,this circuit shows a simple on and off switch using the ne555 timer,this article shows the circuits for converting small voltage to higher voltage that is 6v dc to 12v but with a lower current rating.the zener diode avalanche serves the noise requirement when jammer is used in an extremely silet environment,the proposed design is low cost,as overload may damage the transformer it is necessary to protect the transformer from an overload condition,now we are providing the list of the top electrical mini project ideas on this page,it has the power-line data communication circuit and uses ac power line to send operational status and to receive necessary control signals,pki 6200 looks through the mobile phone signals and automatically activates the jamming device to break the communication when needed.where shall the system be used,1800 to 1950 mhztx frequency (3g),from analysis of the frequency range via useful signal analysis,frequency correction channel (fcch) which is used to allow an ms to accurately tune to a bs,5 kgadvanced modelhigher output powersmall sizecovers multiple frequency band.larger areas or elongated sites will be covered by multiple devices,most devices that use this type of technology can block signals within about a 30-foot radius,deactivating the immobilizer or also programming an additional remote control,this jammer jams the downlinks frequencies of the global mobile communication band- gsm900 mhz and the digital cellular band-dcs 1800mhz using noise extracted from the environment.this device can cover all such areas with a rf-output control of 10.that is it continuously supplies power to the load through different sources like mains or inverter or generator,the rft comprises an in build voltage controlled oscillator.

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Zigbee based wireless sensor network for sewerage monitoring.it was realised to completely control this unit via radio transmission,you may write your comments and new project ideas also by visiting our contact us page.in case of failure of power supply alternative methods were used such as generators,the use of spread spectrum technology eliminates the need for vulnerable “windows” within the frequency coverage of the jammer.cell phones are basically handled two way ratios,where the first one is using a 555 timer ic and the other one is built using active and passive components,this project uses arduino for controlling the devices.the effectiveness of jamming is directly dependent on the existing building density and the infrastructure.key/transponder duplicator 16 x 25 x 5 cmoperating voltage.the operating range is optimised by the used technology and provides for maximum jamming efficiency,this paper uses 8 stages cockcroft –walton multiplier for generating high voltage,2 – 30 m (the signal must < -80 db in the location)size,this project shows automatic change over switch that switches dc power automatically to battery or ac to dc converter if there is a failure,this paper shows the controlling of electrical devices from an android phone using an app.blocking or jamming radio signals is illegal in most countries.the marx principle used in this project can generate the pulse in the range of kv.if there is any fault in the brake red led glows and the buzzer does not produce any sound,conversion of single phase to three phase supply,2 w output powerdcs 1805 – 1850 mhz.generation of hvdc from voltage multiplier using marx generator.programmable load shedding.whether in town or in a rural environment.specificationstx frequency,here is the diy project showing speed control of the dc motor system using pwm through a pc,the duplication of a remote control requires more effort.please visit the highlighted article,with an effective jamming radius of approximately 10 meters,2 w output powerphs 1900 – 1915 mhz.the proposed system is capable of answering the calls through a pre-recorded voice message.each band is designed with individual detection circuits for highest possible sensitivity and consistency.this project shows charging a battery wirelessly,2100-2200 mhzparalyses all types of cellular phonesfor mobile and covert useour pki 6120 cellular phone jammer represents an excellent and powerful jamming solution for larger locations.as many engineering students are searching for the best electrical projects from the 2nd year and 3rd year,this project shows the controlling of bldc motor using a microcontroller.so to avoid this a tripping mechanism is employed.variable power supply circuits,communication system technology use a technique known as frequency division duple xing (fdd) to serve users with a frequency pair that carries information at the uplink and downlink without interference,this task is much more complex,cell towers divide a city into small areas or cells,47µf30pf trimmer capacitorledcoils 3 turn 24 awg,information including base station identity,it is always an element of a predefined.2 w output power3g 2010 – 2170 mhz.churches and mosques as well as lecture halls,this combined system is the right choice to protect such locations,power amplifier and antenna connectors.programmable load shedding.all the tx frequencies are covered by down link only.the data acquired is displayed on the pc,exact coverage control furthermore is enhanced through the unique feature of the jammer.the jammer transmits radio signals at specific frequencies to prevent the operation of cellular phones in a non-destructive way.ix conclusionthis is mainly intended to prevent the usage of mobile phones in places inside its coverage without interfacing with the communication channels outside its range,the scope of this paper is to implement data communication using existing power lines in the vicinity with the help of x10 modules,a piezo sensor is used for touch sensing,energy is transferred from the transmitter to the receiver using the mutual inductance principle.dean liptak getting in hot water for blocking cell phone signals,computer rooms or any other government and military office,a mobile phone might evade jamming due to the following reason.

Control electrical devices from your android phone.the integrated working status indicator gives full information about each band module.phase sequence checker for three phase supply,is used for radio-based vehicle opening systems or entry control systems,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted,the electrical substations may have some faults which may damage the power system equipment.the rf cellular transmitted module with frequency in the range 800-2100mhz,all these functions are selected and executed via the display.its built-in directional antenna provides optimal installation at local conditions,this project shows the generation of high dc voltage from the cockcroft –walton multiplier.the single frequency ranges can be deactivated separately in order to allow required communication or to restrain unused frequencies from being covered without purpose.this causes enough interference with the communication between mobile phones and communicating towers to render the phones unusable,2100 to 2200 mhzoutput power,we hope this list of electrical mini project ideas is more helpful for many engineering students.this project uses an avr microcontroller for controlling the appliances.intermediate frequency(if) section and the radio frequency transmitter module(rft),thus it can eliminate the health risk of non-stop jamming radio waves to human bodies,are suitable means of camouflaging.2 to 30v with 1 ampere of current.this project shows the measuring of solar energy using pic microcontroller and sensors,access to the original key is only needed for a short moment.sos or searching for service and all phones within the effective radius are silenced.3 w output powergsm 935 – 960 mhz,this paper describes the simulation model of a three-phase induction motor using matlab simulink,this project shows the starting of an induction motor using scr firing and triggering.they operate by blocking the transmission of a signal from the satellite to the cell phone tower.but are used in places where a phone call would be particularly disruptive like temples.building material and construction methods,this project uses arduino and ultrasonic sensors for calculating the range.when the brake is applied green led starts glowing and the piezo buzzer rings for a while if the brake is in good condition.when the mobile jammer is turned off,-20°c to +60°cambient humidity.this project shows a no-break power supply circuit,12 v (via the adapter of the vehicle´s power supply)delivery with adapters for the currently most popular vehicle types (approx,a cell phone jammer is a device that blocks transmission or reception of signals,even temperature and humidity play a role,the data acquired is displayed on the pc.vswr over protectionconnections,this industrial noise is tapped from the environment with the use of high sensitivity microphone at -40+-3db.protection of sensitive areas and facilities.frequency scan with automatic jamming,the third one shows the 5-12 variable voltage,upon activating mobile jammers.all mobile phones will automatically re-establish communications and provide full service.several possibilities are available.in contrast to less complex jamming systems,a user-friendly software assumes the entire control of the jammer,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted.110 to 240 vac / 5 amppower consumption,whenever a car is parked and the driver uses the car key in order to lock the doors by remote control,binary fsk signal (digital signal),generation of hvdc from voltage multiplier using marx generator,iii relevant concepts and principlesthe broadcast control channel (bcch) is one of the logical channels of the gsm system it continually broadcasts. wifi blocker ,pc based pwm speed control of dc motor system,when the temperature rises more than a threshold value this system automatically switches on the fan,the pki 6400 is normally installed in the boot of a car with antennas mounted on top of the rear wings or on the roof.they are based on a so-called „rolling code“,a low-cost sewerage monitoring system that can detect blockages in the sewers is proposed in this paper.

But with the highest possible output power related to the small dimensions,– active and passive receiving antennaoperating modes.preventively placed or rapidly mounted in the operational area.0°c – +60°crelative humidity.we – in close cooperation with our customers – work out a complete and fully automatic system for their specific demands,its total output power is 400 w rms,all these security features rendered a car key so secure that a replacement could only be obtained from the vehicle manufacturer.please see the details in this catalogue,20 – 25 m (the signal must < -80 db in the location)size.it is your perfect partner if you want to prevent your conference rooms or rest area from unwished wireless communication,band selection and low battery warning led,once i turned on the circuit,also bound by the limits of physics and can realise everything that is technically feasible.the proposed design is low cost,livewire simulator package was used for some simulation tasks each passive component was tested and value verified with respect to circuit diagram and available datasheet,2 w output powerwifi 2400 – 2485 mhz,this paper shows the real-time data acquisition of industrial data using scada,thus any destruction in the broadcast control channel will render the mobile station communication,embassies or military establishments.the systems applied today are highly encrypted,hand-held transmitters with a „rolling code“ can not be copied,50/60 hz transmitting to 12 v dcoperating time.automatic changeover switch,the light intensity of the room is measured by the ldr sensor.almost 195 million people in the united states had cell- phone service in october 2005,the first types are usually smaller devices that block the signals coming from cell phone towers to individual cell phones,because in 3 phases if there any phase reversal it may damage the device completely,automatic telephone answering machine.both outdoors and in car-park buildings,this paper describes different methods for detecting the defects in railway tracks and methods for maintaining the track are also proposed,this system uses a wireless sensor network based on zigbee to collect the data and transfers it to the control room,the pki 6025 looks like a wall loudspeaker and is therefore well camouflaged.jammer disrupting the communication between the phone and the cell phone base station in the tower.all these project ideas would give good knowledge on how to do the projects in the final year,there are many methods to do this,the integrated working status indicator gives full information about each band module,radio remote controls (remote detonation devices),synchronization channel (sch),this sets the time for which the load is to be switched on/off,the marx principle used in this project can generate the pulse in the range of kv,while the second one is the presence of anyone in the room.with our pki 6670 it is now possible for approx,to duplicate a key with immobilizer.therefore it is an essential tool for every related government department and should not be missing in any of such services,it can also be used for the generation of random numbers.frequency band with 40 watts max,this project shows the starting of an induction motor using scr firing and triggering,a mobile jammer circuit or a cell phone jammer circuit is an instrument or device that can prevent the reception of signals by mobile phones,intelligent jamming of wireless communication is feasible and can be realised for many scenarios using pki’s experience.three circuits were shown here,this project shows a temperature-controlled system,in common jammer designs such as gsm 900 jammer by ahmad a zener diode operating in avalanche mode served as the noise generator,-20°c to +60°cambient humidity.you can copy the frequency of the hand-held transmitter and thus gain access,fixed installation and operation in cars is possible,bomb threats or when military action is underway,– transmitting/receiving antenna,1800 to 1950 mhz on dcs/phs bands,this sets the time for which the load is to be switched on/off.

And it does not matter whether it is triggered by radio,we have designed a system having no match,5 kgkeeps your conversation quiet and safe4 different frequency rangessmall sizecovers cdma,the mechanical part is realised with an engraving machine or warding files as usual,868 – 870 mhz each per devicedimensions.the control unit of the vehicle is connected to the pki 6670 via a diagnostic link using an adapter (included in the scope of supply),the rating of electrical appliances determines the power utilized by them to work properly,phs and 3gthe pki 6150 is the big brother of the pki 6140 with the same features but with considerably increased output power.a frequency counter is proposed which uses two counters and two timers and a timer ic to produce clock signals.police and the military often use them to limit destruct communications during hostage situations.which is used to test the insulation of electronic devices such as transformers.this project uses arduino and ultrasonic sensors for calculating the range,this project shows the generation of high dc voltage from the cockcroft –walton multiplier.modeling of the three-phase induction motor using simulink,gsm 1800 – 1900 mhz dcs/phspower supply,this project shows charging a battery wirelessly,temperature controlled system.optionally it can be supplied with a socket for an external antenna,the light intensity of the room is measured by the ldr sensor,the pki 6025 is a camouflaged jammer designed for wall installation.iv methodologya noise generator is a circuit that produces electrical noise (random.the signal must be < – 80 db in the locationdimensions,the electrical substations may have some faults which may damage the power system equipment,religious establishments like churches and mosques.the jammer is portable and therefore a reliable companion for outdoor use.the paper shown here explains a tripping mechanism for a three-phase power system,the circuit shown here gives an early warning if the brake of the vehicle fails.the choice of mobile jammers are based on the required range starting with the personal pocket mobile jammer that can be carried along with you to ensure undisrupted meeting with your client or personal portable mobile jammer for your room or medium power mobile jammer or high power mobile jammer for your organization to very high power military,5% to 90%the pki 6200 protects private information and supports cell phone restrictions.cpc can be connected to the telephone lines and appliances can be controlled easily.at every frequency band the user can select the required output power between 3 and 1.it consists of an rf transmitter and receiver,the common factors that affect cellular reception include.this paper describes different methods for detecting the defects in railway tracks and methods for maintaining the track are also proposed,when zener diodes are operated in reverse bias at a particular voltage level,a mobile jammer circuit is an rf transmitter,prison camps or any other governmental areas like ministries,230 vusb connectiondimensions.all mobile phones will automatically re- establish communications and provide full service,are freely selectable or are used according to the system analysis.this paper shows the controlling of electrical devices from an android phone using an app,1920 to 1980 mhzsensitivity,the proposed system is capable of answering the calls through a pre-recorded voice message.when the brake is applied green led starts glowing and the piezo buzzer rings for a while if the brake is in good condition.this project shows the control of that ac power applied to the devices,mobile jammers block mobile phone use by sending out radio waves along the same frequencies that mobile phone use,the jamming frequency to be selected as well as the type of jamming is controlled in a fully automated way.it should be noted that these cell phone jammers were conceived for military use,scada for remote industrial plant operation,based on a joint secret between transmitter and receiver („symmetric key“) and a cryptographic algorithm.this covers the covers the gsm and dcs,.