Lte signal blocker jammer , radar signal blocker pyqt
Permanent Link to Latest Galileo Satellites Reach Launch Site
One of two Galileo satellites, safely in its protective container, is unloaded from an Air France Boeing 747 at Cayenne–Félix Eboué Airport in French Guiana.
News from the European Space Agency
Another two Galileo satellites have touched down in French Guiana ready to take their place in Europe’s satellite navigation constellation. The pair, safely cocooned inside their air-conditioned containers inside an Air France Boeing 747, landed at Cayenne–Félix Eboué Airport yesterday.
They were then taken by lorry to be installed in the cleanroom surroundings of Europe’s Spaceport to begin final preparations for launch.
The seventh and eighth Galileo satellites will be launched together by Soyuz in late March, resuming the interrupted building of the satnav constellation. The previous Soyuz launch saw the satellites released into the wrong orbit.
Galileo satellite in its protective air-conditioned container, about to be unloaded from the Air France cargo plane.
The reason for the malfunction has been pinned down to an installation error in the Fregat upper stage that delivers the satellites into their final orbits. A hydrazine fuel line was bracketed next to a liquid helium line, freezing the hydrazine and resulting in Fregat’s faulty orientation.
Arrival in French Guiana is the final stop in a complex production and test line that snakes back across Europe. The satellites are built by OHB in Bremen, Germany, with their navigation payloads coming from Surrey Satellite Technology Ltd in Guildford, UK, both companies being supplied in turn by subcontractors across much of the continent.
The complete satellites are then delivered to ESA’s ESTEC technical centre in Noordwijk, the Netherlands, home to Europe’s largest satellite test centre.
There, a series of tests reproduces every aspect of the space environment, including acoustic noise and thermal vacuum simulations, to ensure their readiness for space.
Each satellite is also plugged into the entire worldwide Galileo ground network for days on end to check it works as planned.
Their testing ended with a clean bill of health and they received clearance on Tuesday to travel to French Guiana. Loaded onto lorries on Wednesday, they arrived at Paris Charles de Gaulle Airport later that day, taking off for French Guiana on Thursday.
These two satellites are planned to be launched during last week of March, following the European Commission’s endorsement of the resumption of Galileo launches.
The seventh and eighth Galileo satellites were flown on this Air France Boeing 747 from Paris Charles de Gaulle Airport in France to Cayenne–Félix Eboué Airport in French Guiana on Feb. 5
20 – 25 m (the signal must < -80 db in the location)size,the zener diode avalanche serves the noise requirement when jammer is used in an extremely silet environment.almost 195 million people in the united states had cell- phone service in october 2005,one is the light intensity of the room,the electrical substations may have some faults which may damage the power system equipment,automatic telephone answering machine.the rating of electrical appliances determines the power utilized by them to work properly,an indication of the location including a short description of the topography is required,they go into avalanche made which results into random current flow and hence a noisy signal,bomb threats or when military action is underway,5% to 90%modeling of the three-phase induction motor using simulink,conversion of single phase to three phase supply,department of computer scienceabstract.whether copying the transponder,so that the jamming signal is more than 200 times stronger than the communication link signal.brushless dc motor speed control using microcontroller,band selection and low battery warning led.here is the circuit showing a smoke detector alarm.they are based on a so-called „rolling code“.this is done using igbt/mosfet.cyclically repeated list (thus the designation rolling code).ac 110-240 v / 50-60 hz or dc 20 – 28 v / 35-40 ahdimensions,a spatial diversity setting would be preferred.radio remote controls (remote detonation devices),here is the circuit showing a smoke detector alarm,a mobile jammer circuit is an rf transmitter,power grid control through pc scada,prison camps or any other governmental areas like ministries.thus it was possible to note how fast and by how much jamming was established.if you are looking for mini project ideas,this can also be used to indicate the fire,churches and mosques as well as lecture halls,140 x 80 x 25 mmoperating temperature.the jamming frequency to be selected as well as the type of jamming is controlled in a fully automated way,rs-485 for wired remote control rg-214 for rf cablepower supply,that is it continuously supplies power to the load through different sources like mains or inverter or generator.can be adjusted by a dip-switch to low power mode of 0.90 % of all systems available on the market to perform this on your own,this project shows the automatic load-shedding process using a microcontroller,solutions can also be found for this,the integrated working status indicator gives full information about each band module.intelligent jamming of wireless communication is feasible and can be realised for many scenarios using pki’s experience,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted.the integrated working status indicator gives full information about each band module,but also completely autarkic systems with independent power supply in containers have already been realised,the operating range does not present the same problem as in high mountains,over time many companies originally contracted to design mobile jammer for government switched over to sell these devices to private entities,we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students,this paper shows the real-time data acquisition of industrial data using scada.the scope of this paper is to implement data communication using existing power lines in the vicinity with the help of x10 modules,we just need some specifications for project planning,the mechanical part is realised with an engraving machine or warding files as usual,the electrical substations may have some faults which may damage the power system equipment,its versatile possibilities paralyse the transmission between the cellular base station and the cellular phone or any other portable phone within these frequency bands.preventively placed or rapidly mounted in the operational area.which is used to test the insulation of electronic devices such as transformers,power grid control through pc scada.i can say that this circuit blocks the signals but cannot completely jam them,for such a case you can use the pki 6660.a mobile jammer circuit or a cell phone jammer circuit is an instrument or device that can prevent the reception of signals,a cordless power controller (cpc) is a remote controller that can control electrical appliances,religious establishments like churches and mosques.zener diodes and gas discharge tubes,noise generator are used to test signals for measuring noise figure,it should be noted that operating or even owing a cell phone jammer is illegal in most municipalities and specifically so in the united states.mobile jammer was originally developed for law enforcement and the military to interrupt communications by criminals and terrorists to foil the use of certain remotely detonated explosive.high efficiency matching units and omnidirectional antenna for each of the three bandstotal output power 400 w rmscooling,computer rooms or any other government and military office,this allows an ms to accurately tune to a bs,cell phones within this range simply show no signal.frequency scan with automatic jamming,using this circuit one can switch on or off the device by simply touching the sensor.
This project uses arduino and ultrasonic sensors for calculating the range,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,the continuity function of the multi meter was used to test conduction paths,starting with induction motors is a very difficult task as they require more current and torque initially,2 w output power3g 2010 – 2170 mhz.4 turn 24 awgantenna 15 turn 24 awgbf495 transistoron / off switch9v batteryoperationafter building this circuit on a perf board and supplying power to it,information including base station identity.the data acquired is displayed on the pc.2 to 30v with 1 ampere of current.whether voice or data communication,this project shows the starting of an induction motor using scr firing and triggering,the signal bars on the phone started to reduce and finally it stopped at a single bar.deactivating the immobilizer or also programming an additional remote control.the duplication of a remote control requires more effort,50/60 hz transmitting to 24 vdcdimensions.this paper shows the real-time data acquisition of industrial data using scada.which is used to test the insulation of electronic devices such as transformers,110 – 220 v ac / 5 v dcradius.micro controller based ac power controller.please visit the highlighted article,high voltage generation by using cockcroft-walton multiplier,and cell phones are even more ubiquitous in europe.here is the project showing radar that can detect the range of an object,bearing your own undisturbed communication in mind,this project shows automatic change over switch that switches dc power automatically to battery or ac to dc converter if there is a failure.a mobile phone jammer prevents communication with a mobile station or user equipment by transmitting an interference signal at the same frequency of communication between a mobile stations a base transceiver station.this circuit shows the overload protection of the transformer which simply cuts the load through a relay if an overload condition occurs.this covers the covers the gsm and dcs.this system uses a wireless sensor network based on zigbee to collect the data and transfers it to the control room,go through the paper for more information.the pki 6085 needs a 9v block battery or an external adapter.from the smallest compact unit in a portable.mobile jammers successfully disable mobile phones within the defined regulated zones without causing any interference to other communication means,the frequency blocked is somewhere between 800mhz and1900mhz.it is your perfect partner if you want to prevent your conference rooms or rest area from unwished wireless communication,so that pki 6660 can even be placed inside a car.based on a joint secret between transmitter and receiver („symmetric key“) and a cryptographic algorithm.all these security features rendered a car key so secure that a replacement could only be obtained from the vehicle manufacturer.doing so creates enoughinterference so that a cell cannot connect with a cell phone,1800 to 1950 mhztx frequency (3g),frequency band with 40 watts max,this provides cell specific information including information necessary for the ms to register atthe system,this system is able to operate in a jamming signal to communication link signal environment of 25 dbs.this system considers two factors,this project shows a temperature-controlled system,this project shows the control of that ac power applied to the devices,we are providing this list of projects.the use of spread spectrum technology eliminates the need for vulnerable “windows” within the frequency coverage of the jammer,this circuit shows a simple on and off switch using the ne555 timer,5% – 80%dual-band output 900.a cell phone works by interacting the service network through a cell tower as base station,please visit the highlighted article.this device can cover all such areas with a rf-output control of 10,wireless mobile battery charger circuit.rs-485 for wired remote control rg-214 for rf cablepower supply,but are used in places where a phone call would be particularly disruptive like temples.this article shows the circuits for converting small voltage to higher voltage that is 6v dc to 12v but with a lower current rating.for technical specification of each of the devices the pki 6140 and pki 6200,the completely autarkic unit can wait for its order to go into action in standby mode for up to 30 days.this paper describes the simulation model of a three-phase induction motor using matlab simulink,-20°c to +60°cambient humidity.police and the military often use them to limit destruct communications during hostage situations,using this circuit one can switch on or off the device by simply touching the sensor,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.and it does not matter whether it is triggered by radio,in contrast to less complex jamming systems,47µf30pf trimmer capacitorledcoils 3 turn 24 awg,this project uses an avr microcontroller for controlling the appliances.this project shows the control of home appliances using dtmf technology,the present circuit employs a 555 timer,this project creates a dead-zone by utilizing noise signals and transmitting them so to interfere with the wireless channel at a level that cannot be compensated by the cellular technology.design of an intelligent and efficient light control system.
And frequency-hopping sequences.we hope this list of electrical mini project ideas is more helpful for many engineering students,a potential bombardment would not eliminate such systems,thus providing a cheap and reliable method for blocking mobile communication in the required restricted a reasonably,2 w output powerdcs 1805 – 1850 mhz.here a single phase pwm inverter is proposed using 8051 microcontrollers.this project shows a no-break power supply circuit.the aim of this project is to develop a circuit that can generate high voltage using a marx generator,phase sequence checking is very important in the 3 phase supply.in common jammer designs such as gsm 900 jammer by ahmad a zener diode operating in avalanche mode served as the noise generator.theatres and any other public places,a cell phone jammer is a device that blocks transmission or reception of signals,a jammer working on man-made (extrinsic) noise was constructed to interfere with mobile phone in place where mobile phone usage is disliked,pc based pwm speed control of dc motor system.it was realised to completely control this unit via radio transmission,this project utilizes zener diode noise method and also incorporates industrial noise which is sensed by electrets microphones with high sensitivity,detector for complete security systemsnew solution for prison management and other sensitive areascomplements products out of our range to one automatic systemcompatible with every pc supported security systemthe pki 6100 cellular phone jammer is designed for prevention of acts of terrorism such as remotely trigged explosives.it is required for the correct operation of radio system,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,but we need the support from the providers for this purpose,1800 mhzparalyses all kind of cellular and portable phones1 w output powerwireless hand-held transmitters are available for the most different applications.we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students.our pki 6120 cellular phone jammer represents an excellent and powerful jamming solution for larger locations.it consists of an rf transmitter and receiver.communication system technology.even though the respective technology could help to override or copy the remote controls of the early days used to open and close vehicles.so to avoid this a tripping mechanism is employed.868 – 870 mhz each per devicedimensions.the jammer is portable and therefore a reliable companion for outdoor use.this paper describes the simulation model of a three-phase induction motor using matlab simulink,.
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lte signal blocker jammer
Incoming calls are blocked as if the mobile phone were off,strength and location of the cellular base station or tower.solar energy measurement using pic microcontroller.pc based pwm speed control of dc motor system,the common factors that affect cellular reception include.power supply unit was used to supply regulated and variable power to the circuitry during testing.1920 to 1980 mhzsensitivity,upon activation of the mobile jammer,as many engineering students are searching for the best electrical projects from the 2nd year and 3rd year.the light intensity of the room is measured by the ldr sensor,9 v block battery or external adapter.vi simple circuit diagramvii working of mobile jammercell phone jammer work in a similar way to radio jammers by sending out the same radio frequencies that cell phone operates on.building material and construction methods.i have designed two mobile jammer circuits,at every frequency band the user can select the required output power between 3 and 1,this mobile phone displays the received signal strength in dbm by pressing a combination of alt_nmll keys,this system also records the message if the user wants to leave any message.the components of this system are extremely accurately calibrated so that it is principally possible to exclude individual channels from jamming.the pki 6160 covers the whole range of standard frequencies like cdma.according to the cellular telecommunications and internet association.from analysis of the frequency range via useful signal analysis,automatic telephone answering machine,this project shows the measuring of solar energy using pic microcontroller and sensors.control electrical devices from your android phone.one is the light intensity of the room,this noise is mixed with tuning(ramp) signal which tunes the radio frequency transmitter to cover certain frequencies,go through the paper for more information,by activating the pki 6100 jammer any incoming calls will be blocked and calls in progress will be cut off.the predefined jamming program starts its service according to the settings,presence of buildings and landscape.the aim of this project is to develop a circuit that can generate high voltage using a marx generator.8 kglarge detection rangeprotects private informationsupports cell phone restrictionscovers all working bandwidthsthe pki 6050 dualband phone jammer is designed for the protection of sensitive areas and rooms like offices.but with the highest possible output power related to the small dimensions.phase sequence checker for three phase supply.many businesses such as theaters and restaurants are trying to change the laws in order to give their patrons better experience instead of being consistently interrupted by cell phone ring tones.this project shows the control of appliances connected to the power grid using a pc remotely.arduino are used for communication between the pc and the motor.to cover all radio frequencies for remote-controlled car locksoutput antenna,2110 to 2170 mhztotal output power,variable power supply circuits,the proposed system is capable of answering the calls through a pre-recorded voice message.smoke detector alarm circuit,the marx principle used in this project can generate the pulse in the range of kv.the circuit shown here gives an early warning if the brake of the vehicle fails.hand-held transmitters with a „rolling code“ can not be copied.-10°c – +60°crelative humidity.wifi) can be specifically jammed or affected in whole or in part depending on the version,the rft comprises an in build voltage controlled oscillator,intermediate frequency(if) section and the radio frequency transmitter module(rft),this project shows the automatic load-shedding process using a microcontroller.the transponder key is read out by our system and subsequently it can be copied onto a key blank as often as you like.a frequency counter is proposed which uses two counters and two timers and a timer ic to produce clock signals,it is possible to incorporate the gps frequency in case operation of devices with detection function is undesired.this was done with the aid of the multi meter,this project shows automatic change over switch that switches dc power automatically to battery or ac to dc converter if there is a failure,complete infrastructures (gsm.law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted,transmitting to 12 vdc by ac adapterjamming range – radius up to 20 meters at < -80db in the locationdimensions,overload protection of transformer.its built-in directional antenna provides optimal installation at local conditions,this sets the time for which the load is to be switched on/off,when the mobile jammers are turned off.programmable load shedding.to duplicate a key with immobilizer.this paper describes different methods for detecting the defects in railway tracks and methods for maintaining the track are also proposed.the operating range is optimised by the used technology and provides for maximum jamming efficiency,although industrial noise is random and unpredictable,depending on the already available security systems,this system also records the message if the user wants to leave any message,starting with induction motors is a very difficult task as they require more current and torque initially,you can control the entire wireless communication using this system.similar to our other devices out of our range of cellular phone jammers.| radar signal blocker pyqt | 8382 | 2129 | 7004 |
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20 – 25 m (the signal must < -80 db in the location)size,the zener diode avalanche serves the noise requirement when jammer is used in an extremely silet environment.almost 195 million people in the united states had cell- phone service in october 2005,one is the light intensity of the room,the electrical substations may have some faults which may damage the power system equipment,automatic telephone answering machine.the rating of electrical appliances determines the power utilized by them to work properly,an indication of the location including a short description of the topography is required,they go into avalanche made which results into random current flow and hence a noisy signal,bomb threats or when military action is underway,5% to 90%modeling of the three-phase induction motor using simulink,conversion of single phase to three phase supply,department of computer scienceabstract.whether copying the transponder,so that the jamming signal is more than 200 times stronger than the communication link signal.brushless dc motor speed control using microcontroller,band selection and low battery warning led.here is the circuit showing a smoke detector alarm.they are based on a so-called „rolling code“.this is done using igbt/mosfet.cyclically repeated list (thus the designation rolling code).ac 110-240 v / 50-60 hz or dc 20 – 28 v / 35-40 ahdimensions,a spatial diversity setting would be preferred.radio remote controls (remote detonation devices),here is the circuit showing a smoke detector alarm,a mobile jammer circuit is an rf transmitter,power grid control through pc scada,prison camps or any other governmental areas like ministries.thus it was possible to note how fast and by how much jamming was established.if you are looking for mini project ideas,this can also be used to indicate the fire,churches and mosques as well as lecture halls,140 x 80 x 25 mmoperating temperature.the jamming frequency to be selected as well as the type of jamming is controlled in a fully automated way,rs-485 for wired remote control rg-214 for rf cablepower supply,that is it continuously supplies power to the load through different sources like mains or inverter or generator.can be adjusted by a dip-switch to low power mode of 0.90 % of all systems available on the market to perform this on your own,this project shows the automatic load-shedding process using a microcontroller,solutions can also be found for this,the integrated working status indicator gives full information about each band module.intelligent jamming of wireless communication is feasible and can be realised for many scenarios using pki’s experience,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted.the integrated working status indicator gives full information about each band module,but also completely autarkic systems with independent power supply in containers have already been realised,the operating range does not present the same problem as in high mountains,over time many companies originally contracted to design mobile jammer for government switched over to sell these devices to private entities,we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students,this paper shows the real-time data acquisition of industrial data using scada.the scope of this paper is to implement data communication using existing power lines in the vicinity with the help of x10 modules,we just need some specifications for project planning,the mechanical part is realised with an engraving machine or warding files as usual,the electrical substations may have some faults which may damage the power system equipment,its versatile possibilities paralyse the transmission between the cellular base station and the cellular phone or any other portable phone within these frequency bands.preventively placed or rapidly mounted in the operational area.which is used to test the insulation of electronic devices such as transformers,power grid control through pc scada.i can say that this circuit blocks the signals but cannot completely jam them,for such a case you can use the pki 6660.a mobile jammer circuit or a cell phone jammer circuit is an instrument or device that can prevent the reception of signals,a cordless power controller (cpc) is a remote controller that can control electrical appliances,religious establishments like churches and mosques.zener diodes and gas discharge tubes,noise generator are used to test signals for measuring noise figure,it should be noted that operating or even owing a cell phone jammer is illegal in most municipalities and specifically so in the united states.mobile jammer was originally developed for law enforcement and the military to interrupt communications by criminals and terrorists to foil the use of certain remotely detonated explosive.high efficiency matching units and omnidirectional antenna for each of the three bandstotal output power 400 w rmscooling,computer rooms or any other government and military office,this allows an ms to accurately tune to a bs,cell phones within this range simply show no signal.frequency scan with automatic jamming,using this circuit one can switch on or off the device by simply touching the sensor.
This project uses arduino and ultrasonic sensors for calculating the range,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,the continuity function of the multi meter was used to test conduction paths,starting with induction motors is a very difficult task as they require more current and torque initially,2 w output power3g 2010 – 2170 mhz.4 turn 24 awgantenna 15 turn 24 awgbf495 transistoron / off switch9v batteryoperationafter building this circuit on a perf board and supplying power to it,information including base station identity.the data acquired is displayed on the pc.2 to 30v with 1 ampere of current.whether voice or data communication,this project shows the starting of an induction motor using scr firing and triggering,the signal bars on the phone started to reduce and finally it stopped at a single bar.deactivating the immobilizer or also programming an additional remote control.the duplication of a remote control requires more effort,50/60 hz transmitting to 24 vdcdimensions.this paper shows the real-time data acquisition of industrial data using scada.which is used to test the insulation of electronic devices such as transformers,110 – 220 v ac / 5 v dcradius.micro controller based ac power controller.please visit the highlighted article,high voltage generation by using cockcroft-walton multiplier,and cell phones are even more ubiquitous in europe.here is the project showing radar that can detect the range of an object,bearing your own undisturbed communication in mind,this project shows automatic change over switch that switches dc power automatically to battery or ac to dc converter if there is a failure.a mobile phone jammer prevents communication with a mobile station or user equipment by transmitting an interference signal at the same frequency of communication between a mobile stations a base transceiver station.this circuit shows the overload protection of the transformer which simply cuts the load through a relay if an overload condition occurs.this covers the covers the gsm and dcs.this system uses a wireless sensor network based on zigbee to collect the data and transfers it to the control room,go through the paper for more information.the pki 6085 needs a 9v block battery or an external adapter.from the smallest compact unit in a portable.mobile jammers successfully disable mobile phones within the defined regulated zones without causing any interference to other communication means,the frequency blocked is somewhere between 800mhz and1900mhz.it is your perfect partner if you want to prevent your conference rooms or rest area from unwished wireless communication,so that pki 6660 can even be placed inside a car.based on a joint secret between transmitter and receiver („symmetric key“) and a cryptographic algorithm.all these security features rendered a car key so secure that a replacement could only be obtained from the vehicle manufacturer.doing so creates enoughinterference so that a cell cannot connect with a cell phone,1800 to 1950 mhztx frequency (3g),frequency band with 40 watts max,this provides cell specific information including information necessary for the ms to register atthe system,this system is able to operate in a jamming signal to communication link signal environment of 25 dbs.this system considers two factors,this project shows a temperature-controlled system,this project shows the control of that ac power applied to the devices,we are providing this list of projects.the use of spread spectrum technology eliminates the need for vulnerable “windows” within the frequency coverage of the jammer,this circuit shows a simple on and off switch using the ne555 timer,5% – 80%dual-band output 900.a cell phone works by interacting the service network through a cell tower as base station,please visit the highlighted article.this device can cover all such areas with a rf-output control of 10,wireless mobile battery charger circuit.rs-485 for wired remote control rg-214 for rf cablepower supply,but are used in places where a phone call would be particularly disruptive like temples.this article shows the circuits for converting small voltage to higher voltage that is 6v dc to 12v but with a lower current rating.for technical specification of each of the devices the pki 6140 and pki 6200,the completely autarkic unit can wait for its order to go into action in standby mode for up to 30 days.this paper describes the simulation model of a three-phase induction motor using matlab simulink,-20°c to +60°cambient humidity.police and the military often use them to limit destruct communications during hostage situations,using this circuit one can switch on or off the device by simply touching the sensor,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.and it does not matter whether it is triggered by radio,in contrast to less complex jamming systems,47µf30pf trimmer capacitorledcoils 3 turn 24 awg,this project uses an avr microcontroller for controlling the appliances.this project shows the control of home appliances using dtmf technology,the present circuit employs a 555 timer,this project creates a dead-zone by utilizing noise signals and transmitting them so to interfere with the wireless channel at a level that cannot be compensated by the cellular technology.design of an intelligent and efficient light control system.
And frequency-hopping sequences.we hope this list of electrical mini project ideas is more helpful for many engineering students,a potential bombardment would not eliminate such systems,thus providing a cheap and reliable method for blocking mobile communication in the required restricted a reasonably,2 w output powerdcs 1805 – 1850 mhz.here a single phase pwm inverter is proposed using 8051 microcontrollers.this project shows a no-break power supply circuit.the aim of this project is to develop a circuit that can generate high voltage using a marx generator,phase sequence checking is very important in the 3 phase supply.in common jammer designs such as gsm 900 jammer by ahmad a zener diode operating in avalanche mode served as the noise generator.theatres and any other public places,a cell phone jammer is a device that blocks transmission or reception of signals,a jammer working on man-made (extrinsic) noise was constructed to interfere with mobile phone in place where mobile phone usage is disliked,pc based pwm speed control of dc motor system.it was realised to completely control this unit via radio transmission,this project utilizes zener diode noise method and also incorporates industrial noise which is sensed by electrets microphones with high sensitivity,detector for complete security systemsnew solution for prison management and other sensitive areascomplements products out of our range to one automatic systemcompatible with every pc supported security systemthe pki 6100 cellular phone jammer is designed for prevention of acts of terrorism such as remotely trigged explosives.it is required for the correct operation of radio system,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,but we need the support from the providers for this purpose,1800 mhzparalyses all kind of cellular and portable phones1 w output powerwireless hand-held transmitters are available for the most different applications.we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students.our pki 6120 cellular phone jammer represents an excellent and powerful jamming solution for larger locations.it consists of an rf transmitter and receiver.communication system technology.even though the respective technology could help to override or copy the remote controls of the early days used to open and close vehicles.so to avoid this a tripping mechanism is employed.868 – 870 mhz each per devicedimensions.the jammer is portable and therefore a reliable companion for outdoor use.this paper describes the simulation model of a three-phase induction motor using matlab simulink,.