• Frequency jammer device,gps tracking device signal jammer software,  Fully Integrated NAPA Receiver Brings Mass-Market Potential This integrated circuit supports simultaneous reception and processing of the GPS L1/L5, Galileo E1/E5a, and GLONASS G1 signals...

Frequency jammer device , gps tracking device signal jammer software

Frequency jammer device , gps tracking device signal jammer software


  • 2021/03/08
  Fully Integrated NAPA Receiver Brings Mass-Market Potential This integrated circuit supports simultaneous reception and processing of the GPS L1/L5, Galileo E1/E5a, and GLONASS G1 signals with 40 tracking channels. The dual-band analog RF front-end is integrated on the same mixed-signal chip as the baseband hardware, including an embedded processor to close the tracking loops: overall, a compact, low-power, and low-cost solution. By Fabio Garzia, Stefan Köhler, Santiago Urquijo, Philipp Neumaier,Jörn Driesen, Sybille Haas, Thomas Leineweber, Tao Zhang, Sascha Krause, Frank Henkel,Alexander Rügamer, Matthias Overbeck, and Günther Rohmer Multi-constellation multi-band global navigation satellite system (GNSS) receivers can efficiently exploit the advantages derived from the modernization of existing GNSS constellations, such as GPS and GLONASS, as well as from the launch of new ones like Galileo and BeiDou. Utilizing multiple systems can significantly improve the availability of a navigation solution in urban canyons and heavily shadowed areas. Increased satellite availability also guarantees higher measurement redundancy and improved reliability. Moreover, the excellent inherent noise and multipath mitigation capabilities of the new and modernized wideband signals in the L5/E5a band, combined with the ionosphere error mitigation given by frequency diversity, significantly improves the accuracy in both measurement and position domains. Still, most commercial fully-integrated single-chip mass market GNSS receivers use only a single-frequency band for their positioning, velocity, time (PVT) solution: either GPS L1 C/A or Galileo E1 and GLONASS G1. For example, the Teseo chips are single-chip solutions that support multiple constellations but only on one frequency band. This approach reduces  design costs and enables the lowest consumption of power, but neglects the advantages of wideband signal processing  – which offers increased robustness thanks to  two simultaneous frequency band receptions and the capability of mitigating the ionosphere error. Another approach for realizing multi-constellation multi-frequency solutions is to combine different chips for the analog front-end and the digital baseband. One fully integrated single-chip analog multi-band front-end for the simultaneous reception of GPS L1/L5, Galileo E1/E5, and GLONASS has been presented. However, this chip included only the front-end and requires an additional, separate digital-baseband solution. The purpose of the NAPA project (NAvigation chip for Pedestrian navigation and higher precision Applications) is to close this gap by providing a fully integrated, compact, low-power, and low-cost solution in which the analog and digital parts of the GNSS receiver are integrated together on the same chip. The NAPA receiver offers all the advantages of multi-constellation reception with additional dual-frequency support. The NAPA chip features a monolithic, single mixed-signal chip implementation of a multi-system, multi-band analog front-end and the related digital baseband core, including an embedded processor. The NAPA chip can be used as a stand-alone GNSS sensor, because no additional components are required to obtain a PVT solution. The ASIC was implemented in a low-power technology and adopts some ad-hoc low-power architectural features. In regard to costs, an ASIC solution is more convenient than FPGA,  provided the non-recurring engineering costs (NRE) are amortized by the amount of chips manufactured and sold. The NAPA chip supports multi-system (GPS, Galileo, and GLONASS) and multi-band (GPS/Galileo L1/E1, L5/E5a, GLONASS G1) processing. Figure 1 shows the frequency band being selected for receiving and processing in the NAPA chip. With two fully deployed GNSS — GPS and GLONASS — NAPA chips can already be used in many commercial applications. Thanks to the spectral overlay of the GPS L1/L5 and Galileo E1/E5a signals, the chip is also ready for Galileo. The frequency selection features both the narrow-band legacy signals L1/G1, which can be used for fast acquisition. For highest tracking accuracy, the wideband GPS L5 and Galileo E5a BPSK(10) modulated signals can be utilized. Figure 1. GNSS signals received and processed by the NAPA chip. The higher accuracy is  obtained primarily by the attenuation of the ionospheric error. The ionosphere is a dispersing media that can introduce a bias error between 1 and 20 m. Forming a linear combination of two independent frequency-band measurements, the ionospheric bias can be measured and almost completely removed. In addition, Precise Point Positioning and Wide/Narrow-laning combinations are possible, thanks to the second received frequency band. The first allows for the combination of precise satellite positions and clocks with multi-frequency measurements, providing cm/dm solutions. The second adopts fast ambiguity solutions for carrier-phase positioning and cycle-slip detection. In this article, we present the NAPA chip in detail. We describe the architecture of the analog front-end and its digital counterpart and the innovative features of each. Then we provide details about chip implementation, manufacturing, and test setup. Finally, we present the first verification results and draw conclusions. Architecture Overview The NAPA chip architecture, depicted in Figure 2,  is composed of two separate blocks integrated on the same silicon die: the analog core provides the functionality of a two-frequency radio-frequency (RF) front-end, whereas the digital part implements the main GNSS processing tasks, including the correlator channels and an embedded processor, and takes care of the RF front-end control. The interface between the two blocks is completely digital and provides synchronizers to ensure a valid clock domain crossing (CDC). Figure 2. Overall NAPA architecture with emphasis on the digital core blocks. Analog Front-End. The analog RF front-end supports the simultaneous reception of GPS L5 / Galileo E5a and GPS L1 / Galileo E1 / GLONASS G1 signals as well as modes where only one reception path is activated. Both passive and active GNSS antennas are supported, thanks to integrated low noise amplifiers (LNA). There are two separate signal reception paths for the two frequency bands. The L1/E1/G1 path is characterized by a quasi-zero-IF conversion that mixes the middle frequency between L1/E1 and G1 to zero frequency. The L1/E1 reception bandwidth is up to 14 MHz so as to incorporate the MBOC modulations of Galileo E1 and future GPS L1C signals. A programmable automatic gain control (AGC) controls the complex analog baseband signals before they are digitized with a 4-bit dual-channel analog digital converter (ADC). The second reception path receives an L5/E5a signal with up to 20 MHz bandwidth for the BPSK(10) modulated signals. This path uses a low-IF architecture. The signal is down-converted to an intermediate frequency (IF) of 15.345 MHz. The image frequency is suppressed by a polyphase filter. The real-valued analog signal is controlled by an AGC and converted to the digital domain using a single 4-bit ADC. A common phase locked loop (PLL) is used with specific L1/E1/G1 and L5/E5a dividers to generate the mixers’ local oscillator (LO) frequencies. The PLL loop filter is integrated on-chip to minimize external elements. Moreover, automatic filter and voltage-controlled oscillator (VCO) calibrations are included to mitigate process tolerances. The PLL can handle input clock frequencies between 10 and 80 MHz with a recommended clock frequency of 36.115 MHz. An SPI core was implemented on the front-end part to facilitate control of the different front-end features. This means it is possible to tune the PLL, to switch off a complete front-end path if the second frequency band is not used and to activate different on-chip calibration procedures. The frequency plan of the front-end is depicted in Figure 3. Due to the quasi zero-IF architecture, the complex L1/E1 baseband signal is located on an IF of -13.64 MHz and the GLONASS G1 frequency division multiple access (FDMA) signals on an IF of +12.94 MHz, with respect to the GLONASS G1 center frequency of 1602 MHz. The real-valued L5/E5a signals are provided by the second ADC and located on an IF of 15.345 MHz. Figure 3. RF front-end frequency plan. The ADC samples are generated with a frequency of 74.4871875 MHz for both the single channel L5, as well as for the dual-channel L1/E1/G1 ADCs. The ADC clock is also directly connected to the baseband digital core and is used as the main clock for the GNSS hardware modules. The embedded processor in the digital core receives a second clock, which is twice as fast as the GNSS hardware one. Digital Baseband SoC. The baseband is characterized by a system-on-chip (SoC) architecture based on a SPARC-compatible 32-bit LEON2 microprocessor running at approximately 150 MHz. The GNSS functionality, including acquisition and tracking, are implemented using dedicated hardware modules. The processor’s primary functions are to correctly configure the RF front-end and control the different parts of the receiver. In particular, it triggers acquisition, initializes, and starts the tracking channels with the signals detected during acquisition and takes care of closing the frequency/phase/delay locked loops (FLL/PLL/DLL) used for signal tracking. The tracking loops have strict real-time constraints; communication between the channels and the processor features a high-speed infrastructure. Structurally, the processor is connected to a hierarchical on-chip Advanced Microcontroller Bus Architecture (AMBA) composed of a high-performance bus (AHB) and a peripheral bus (APB). The AHB provides a direct connection between the processor, the real-time GNSS modules, and the system memory, a monolithic 1 MByte block that hosts the main program at run-time. Different programs can be loaded if needed by using the external SD-card interface. In addition to the processor, there are four additional AHB masters: the bootloader, the SD-card controller, the real-time GNSS modules, and the on-chip processor debugger. The bootloader is in charge of the bus control at system start-up. The SD-card controller has integrated direct-memory access (DMA) capabilities to move data between the SD card and the system memory. The real-time GNSS modules can write the tracking results directly to the system memory. Finally, the integrated processor debugger allows real-time debugging and is used mainly in the verification phase. The APB provides a connection to generic peripherals, and control and status interface of the GNSS modules without real-time constraints, as well as the control and status interface of the RF front-end. Since the GNSS modules operate in a separate clock domain that runs at half the frequency of the processor domain, some synchronization logic is necessary to ensure correct CDC. The adoption of an SoC architecture provides  higher flexibility than conventional static hardware solutions. In addition to typical GNSS applications, the user can also implement some signal monitoring and processing algorithms in software. The eCos-embedded operating system is provided to ease software development. Generic Peripherals. The digital core is equipped with several peripherals that enable the communication with the outside world. The two separate universal asynchronous receiver/transmitter (UART) interfaces can run at 115.2 kbps. A dedicated serial peripheral interface (SPI) master is also provided with a maximum of 10-MHz clock frequency. For example, these interfaces can be used to provide NMEA data to some external display device or raw data (pseudoranges, code phases) in order to calculate a PVT solution. It is also possible to directly access the measurements generated from the correlator hardware and to control the tracking NCOs, which means users can choose their own algorithms for the loop closure. A possible application is the realization of vector-delay tracking using the NAPA ASIC and an external processor. The SD-card interface facilitates the loading and storage of large amounts of data, for example, memory codes and almanacs. The possibility of making signal snapshots periodically and saving them to an SD card for later analysis has also been foreseen. This could be useful in special applications in which the receiver hardware is not accessible to the user all of the time. In addition, 10 general-purpose I/O pins (GPIO) are provided. They can be controlled via software and can provide a very basic interface (for example, to connect to external LEDs or switches). Acquisition Module. The acquisition module adopts a parallel code phase search in the Fourier domain by using a 16-k Samples Fast Fourier Transform (FFT) core. The adopted algorithm is known as parallel code-phase search. The L1/E1/G1 signals coming from the front-end are first filtered and then sent to the acquisition module to allow a fast detection of the satellites in the L1/E1/G1 bands with their respective code delays and Doppler frequencies. The acquisition of GLONASS G1 FDMA signals is possible thanks to a software-configurable hardware mixer that can be set with the different G1 carrier frequencies. No direct hardware acquisition is supported for the L5/E5a band signals. The tracking of L5/E5a band signals is possible by performing a hand-over from L1/E1 band or a Tong search using the tracking channels. The acquisition process is performed iteratively over all the possible satellites and over a set of Doppler values. These values are obtained by dividing the complete range of possible Doppler variations into bins. The smaller these bins are, the more accurate the acquisition result, but the more time is required to complete the entire process. The acquisition has an additional layer of configurability because of the adoption of coherent and incoherent accumulations. These accumulations are supported in hardware but are completely software-controlled. This provides another possibility for achieving  higher accuracy, but at the cost of a larger execution time due to an increase in the amount of accumulations. To speed up acquisition, we introduced a dedicated logic based on a novel patented algorithm. With this algorithm, we are able to detect the Doppler of the L1/E1 satellites present in the signal with an accuracy of 2 Hz. By performing this Doppler search step before the actual acquisition, we are able to generate a list with Doppler values that can be used instead of the bins. This gives more accurate results thanks to the algorithm’s inherent accuracy (see Figure 4) and allows a reduction in the acquisition time since the amount of Doppler values are usually smaller than the bins. Another advantage of this algorithm is the possibility to detect the transition to an indoor context (such as where there is a lack of satellite signals) by simply  looking at the Doppler list, without performing any acquisition. Figure 4. Comparison between standard and Doppler-list based acquisition of an L1 signal. A single iteration step for the acquisition of a GPS L1 signal requires no more than 1 ms for each accumulated epoch. To achieve a good compromise between accuracy and speed, we typically use four epochs of incoherent accumulation, which means approximately 4 ms execution time. For Galileo L1 with four incoherent accumulations, an iteration step takes approximately 16 ms. This time has to be multiplied by the number of satellites and bins to estimate the execution time of the complete process. Integrated Acquisition Memories. The acquisition module is characterized by dedicated memory blocks used for the fast FFT processing. It also provides the possibility to use these on-chip memories to store a snapshot of the incoming signals. In particular, we can store up to 81,920 samples of raw data for the complex L1 and real L5 IF signals for further analysis or processing, even off-chip. This enables sophisticated spoofing detection methods, for example, as well as interferer detection and characterization methods. Spoofing detection can be implemented by monitoring the 2D-acquisition search space. Interferer detection and characterization can employ short-time Fourier transforms (STFT) on the snapshot. Using the chip as a simple snapshot receiver without having to use the on-chip dedicated GNSS hardware is also a possibilty. For this purpose, the integrated peripherals like UART and SPI ports are provided as interfaces. Tracking Module. The 40 versatile tracking channels can be mapped to any combination of GPS, Galileo, and GLONASS signals on the two reception bands. One possible combination would be to track 10 GPS and 10 Galileo satellites simultaneously on both L1/E1 and L5/E5a bands. Alternatively, the user can include GLONASS signals by using fewer GPS / Galileo combinations. The assignment of these tracking channels to the actual GNSS signals can be changed at run-time in order to adapt to different reception situations or to assist the selected signal processing methods. Each channel is characterized by a five-tap correlator. For the BPSK modulated signals without side peaks, such as GPS L1/L5, Galileo E5a, and GLONASS G1, we use only three values (early, late, and prompt). For Galileo E1 BOC(1,1) signals, five values are foreseen (very early and very late in addition to the previous), so that false peak lock conditions can be detected and a bump-jumping algorithm can be applied. The switch between these modes can be done at run-time and determines the amount of correlation values to be exchanged between correlators and processor. Low-Power Features. The GNSS modules operate in their own clock domain. This clock domain is divided in clock-gated regions. There is a common region for the bus interfaces, one region for the acquisition, and one for each tracking channel. This allows a fine-grain shut-down of the GNSS modules that are not currently in use. For example, the acquisition can be deactivated when there are enough signals in tracking or the unused tracking channels can be disabled. This allows a reduced power consumption for the idle modules. This activation/deactivation procedure is controlled through a set of registers connected to the APB and is performed via software. External Front-End Interface. To allow for more flexibility, we provided an additional RF front-end interface. The interface is also depicted in Figure 3. This interface features one 2-bit complex and an additional 2-bit real input, as well as a clock input. The user can decide to directly connect the digital baseband core to an external RF front-end with compatible sampling rate parameters, and exclude the on-chip RF front-end. This makes it possible to use the NAPA chip for validating other RF front-end devices, or it can be adapted to special customer needs. Boot-Up Sequence. The SoC includes a hard-coded bootloader that is in charge of the bus control at start-up. In this phase, the processor is switched off. The bootloader loads a 24-kByte program from the SD-card to the system memory and starts the processor. In this phase, the processor runs with the external oscillator clock. Having performed the RF front-end initialization, the processor can switch to the front-end PLL generated processor clock that runs at approximately 150 MHz. This switch is completely transparent to the processor. Then the actual main GNSS receiver program is loaded into the system memory and executed. The NAPA Chip The NAPA chip has been manufactured in a low-power 1.2 V 65 nm TSMC technology. The 4.5 mm x 5.0 mm chip die was mounted in a QFN68 package; first test samples are available. The core requires a 1.2 V power supply, the pads 1.8 V. Figure 5 shows a picture of the die and its interconnections. The two parts, the analog core and the digital baseband, are clearly distinguishable. The chip is currently in the verification phase. Figure 5. NAPA chip. Within the project, the development and testing of the NAPA design was carried out on basically two platforms. During the hardware development phase, the baseband core has been prototyped on a FPGA device and tested using a special file-player setup, as explained in the following section. Having taped out the chip and received the first samples from the foundry, a test board has been developed in order to verify NAPA chip functionality. FPGA Test Setup. In the development phase, the NAPA baseband core has been implemented on a Xilinx Virtex6 FPGA device. A Xilinx ML605 development board has been used for the test setup. The main limitation of the testing in this phase was the lack of an analog RF front-end prototype. In order to make  early testing of GNSS functionality possible, we adopted a file player developed by Fraunhofer IIS in a previous project. This file player uses a desktop PC to reproduce a digital signal data-stream stored in a binary file on the PC. The stream is sent through a dedicated interface to a commercial digital acquisition board. This board receives a clock synchronized with the baseband core’s clock in the FPGA and delivers the signals directly to the FPGA pins. The complete setup is depicted in Figure 6. The setup in use can be seen on the left part of the opening figure. Figure 6. FPGA test setup. Test Board. In the verification phase, which is currently ongoing, the first unpackaged test chip dies have been glued directly to the test PCB and bonded on board without any housing. After receiving the packaged chips, the QFN68 could be regularly soldered on the PCB. A block diagram of the board is depicted in Figure 7. The board hosts the typical switch buttons and LEDs for quick control and status detection as well as some specific interfaces. The clock can be provided through a dedicated SMA clock connector as well as a discrete oscillator. Two sub-miniature push-on (SMP) connectors are also provided for separate the L1 and L5 antenna inputs. The two UART ports, the debugger UART, and the SPI master port are connected using a FTDI chip. This chip allows the simultaneous connection of these ports to a desktop PC’s USB port. A parallel connector is provided to interface external front-end ADC signals and clock. The GPIOs are accessible through the same connector. A dedicated socket is added for a mini-SD card. Figure 7. Block diagram of NAPA test board. Preliminary Results The chip on the test board was first tested  using the same file player of the FPGA setup. This way, we could evaluate the correct functionality of the digital baseband core without the need to activate and configure the on-chip front-end. After the successful tests, we focused on the on-chip front-end configuration, and we used the antenna connectors to provide valid GNSS signals. We tested the chip using three different configurations: a GNSS signal simulator, a static roof antenna, and a small active patch antenna. In the three configurations, we successfully acquired GPS L1 and Galileo E1 signals. We were also able to perform tracking on GPS L1 and L5I, as well as Galileo E1b and E5aI. Figure 8 shows the spectrum of a snapshot of L1 and L5 paths made using the on-chip dedicated snapshot hardware and sent through the UART port with a dedicated binary protocol for offline processing. For this special test, we used an arbitrary waveform generator to provide noiseless Galileo and GLONASS signals in the L1 and L5 frequency bands, supported by the NAPA chip. After performing a FFT of the two snapshots, we can clearly see these signals. In the L1 plot, the E1b signal is present in the negative frequency range with the two peaks typical of the BOC(1,1) modulation. The FDMA GLONASS G1 is in the positive frequency range with its trapezoidal characteristic. It is also possible to see a side lobe of the E1a BOCcos(15,2.5) in the proximity of the zero frequency. In the L5 plot, we can see the main peak of BPSK E5a signal on the right and its mirrored image on the left, due to the fact that L5 signal path is real. Figure 8. Spectrum of L1 and L5 band showing a Galileo E1 and E5a signal. Acknowledgment This project has been funded by the Bundesministerium für Bildung und Forschung (BMBF) (German Federal Ministry of Education and Research), which is gratefully acknowledged.


frequency jammer device

Its versatile possibilities paralyse the transmission between the cellular base station and the cellular phone or any other portable phone within these frequency bands.but are used in places where a phone call would be particularly disruptive like temples,for any further cooperation you are kindly invited to let us know your demand.so that the jamming signal is more than 200 times stronger than the communication link signal,this paper uses 8 stages cockcroft –walton multiplier for generating high voltage,it detects the transmission signals of four different bandwidths simultaneously.12 v (via the adapter of the vehicle´s power supply)delivery with adapters for the currently most popular vehicle types (approx,that is it continuously supplies power to the load through different sources like mains or inverter or generator,925 to 965 mhztx frequency dcs,railway security system based on wireless sensor networks,this was done with the aid of the multi meter,this project shows the generation of high dc voltage from the cockcroft –walton multiplier.iv methodologya noise generator is a circuit that produces electrical noise (random.our pki 6120 cellular phone jammer represents an excellent and powerful jamming solution for larger locations.due to the high total output power,all these functions are selected and executed via the display,computer rooms or any other government and military office.wireless mobile battery charger circuit,while the second one is the presence of anyone in the room,this system uses a wireless sensor network based on zigbee to collect the data and transfers it to the control room,cpc can be connected to the telephone lines and appliances can be controlled easily,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,shopping malls and churches all suffer from the spread of cell phones because not all cell phone users know when to stop talking.whether copying the transponder,completely autarkic and mobile,2 to 30v with 1 ampere of current.the operational block of the jamming system is divided into two section,information including base station identity,this system also records the message if the user wants to leave any message.this combined system is the right choice to protect such locations,this project shows the control of appliances connected to the power grid using a pc remotely.the aim of this project is to develop a circuit that can generate high voltage using a marx generator,a total of 160 w is available for covering each frequency between 800 and 2200 mhz in steps of max,band selection and low battery warning led.we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students,high voltage generation by using cockcroft-walton multiplier.

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The integrated working status indicator gives full information about each band module,the complete system is integrated in a standard briefcase,the common factors that affect cellular reception include,my mobile phone was able to capture majority of the signals as it is displaying full bars.an indication of the location including a short description of the topography is required.upon activation of the mobile jammer,the second type of cell phone jammer is usually much larger in size and more powerful.prison camps or any other governmental areas like ministries.pc based pwm speed control of dc motor system,it can also be used for the generation of random numbers,it consists of an rf transmitter and receiver,this project shows the system for checking the phase of the supply,the whole system is powered by an integrated rechargeable battery with external charger or directly from 12 vdc car battery,this paper describes the simulation model of a three-phase induction motor using matlab simulink,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,we just need some specifications for project planning,micro controller based ac power controller.generation of hvdc from voltage multiplier using marx generator,that is it continuously supplies power to the load through different sources like mains or inverter or generator.from analysis of the frequency range via useful signal analysis,so that pki 6660 can even be placed inside a car,transmitting to 12 vdc by ac adapterjamming range – radius up to 20 meters at < -80db in the locationdimensions,this is done using igbt/mosfet.the civilian applications were apparent with growing public resentment over usage of mobile phones in public areas on the rise and reckless invasion of privacy,the transponder key is read out by our system and subsequently it can be copied onto a key blank as often as you like,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,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,variable power supply circuits.solar energy measurement using pic microcontroller.this project shows the measuring of solar energy using pic microcontroller and sensors,ac 110-240 v / 50-60 hz or dc 20 – 28 v / 35-40 ahdimensions,the pki 6025 is a camouflaged jammer designed for wall installation.230 vusb connectiondimensions.the multi meter was capable of performing continuity test on the circuit board,normally he does not check afterwards if the doors are really locked or not,incoming calls are blocked as if the mobile phone were off.

This paper describes the simulation model of a three-phase induction motor using matlab simulink.frequency band with 40 watts max.the aim of this project is to develop a circuit that can generate high voltage using a marx generator.this paper shows the real-time data acquisition of industrial data using scada,you can control the entire wireless communication using this system,so to avoid this a tripping mechanism is employed,weather and climatic conditions.this causes enough interference with the communication between mobile phones and communicating towers to render the phones unusable,doing so creates enoughinterference so that a cell cannot connect with a cell phone,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,cell towers divide a city into small areas or cells.cell phones within this range simply show no signal,iii relevant concepts and principlesthe broadcast control channel (bcch) is one of the logical channels of the gsm system it continually broadcasts,this project shows charging a battery wirelessly.where shall the system be used.here is a list of top electrical mini-projects,-20°c to +60°cambient humidity,go through the paper for more information.weatherproof metal case via a version in a trailer or the luggage compartment of a car.this system considers two factors. Mobile Phone Jammer Sale .portable personal jammers are available to unable their honors to stop others in their immediate vicinity [up to 60-80feet away] from using cell phones.1 watt each for the selected frequencies of 800,depending on the vehicle manufacturer,by this wide band jamming the car will remain unlocked so that governmental authorities can enter and inspect its interior,wifi) can be specifically jammed or affected in whole or in part depending on the version.phs and 3gthe pki 6150 is the big brother of the pki 6140 with the same features but with considerably increased output power,are suitable means of camouflaging.based on a joint secret between transmitter and receiver („symmetric key“) and a cryptographic algorithm,its total output power is 400 w rms.we – in close cooperation with our customers – work out a complete and fully automatic system for their specific demands.blocking or jamming radio signals is illegal in most countries,the integrated working status indicator gives full information about each band module,and cell phones are even more ubiquitous in europe,this also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values,the inputs given to this are the power source and load torque.

Pll synthesizedband capacity.so that we can work out the best possible solution for your special requirements,dtmf controlled home automation system,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted,the scope of this paper is to implement data communication using existing power lines in the vicinity with the help of x10 modules,whether in town or in a rural environment.this covers the covers the gsm and dcs,the frequencies extractable this way can be used for your own task forces,overload protection of transformer,1800 to 1950 mhztx frequency (3g).different versions of this system are available according to the customer’s requirements,arduino are used for communication between the pc and the motor,a mobile phone might evade jamming due to the following reason,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,– transmitting/receiving antenna,20 – 25 m (the signal must < -80 db in the location)size.in contrast to less complex jamming systems.by activating the pki 6100 jammer any incoming calls will be blocked and calls in progress will be cut off,phase sequence checker for three phase supply.this project uses arduino for controlling the devices.auto no break power supply control,theatres and any other public places,the scope of this paper is to implement data communication using existing power lines in the vicinity with the help of x10 modules,the jammer works dual-band and jams three well-known carriers of nigeria (mtn,embassies or military establishments,vswr over protectionconnections,mobile jammers effect can vary widely based on factors such as proximity to towers,a prototype circuit was built and then transferred to a permanent circuit vero-board.mainly for door and gate control,because in 3 phases if there any phase reversal it may damage the device completely.90 %)software update via internet for new types (optionally available)this jammer is designed for the use in situations where it is necessary to inspect a parked car,overload protection of transformer.the proposed design is low cost.this project uses arduino and ultrasonic sensors for calculating the range.each band is designed with individual detection circuits for highest possible sensitivity and consistency,it is required for the correct operation of radio system.

The jammer covers all frequencies used by mobile phones.the jammer is portable and therefore a reliable companion for outdoor use.preventively placed or rapidly mounted in the operational area.6 different bands (with 2 additinal bands in option)modular protection,as many engineering students are searching for the best electrical projects from the 2nd year and 3rd year.the systems applied today are highly encrypted,solar energy measurement using pic microcontroller.this is as well possible for further individual frequencies.clean probes were used and the time and voltage divisions were properly set to ensure the required output signal was visible,three circuits were shown here,mobile jammers block mobile phone use by sending out radio waves along the same frequencies that mobile phone use,starting with induction motors is a very difficult task as they require more current and torque initially.variable power supply circuits.almost 195 million people in the united states had cell- phone service in october 2005,morse key or microphonedimensions.design of an intelligent and efficient light control system.the next code is never directly repeated by the transmitter in order to complicate replay attacks,the duplication of a remote control requires more effort.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),47µf30pf trimmer capacitorledcoils 3 turn 24 awg,it employs a closed-loop control technique,ii mobile jammermobile jammer is used to prevent mobile phones from receiving or transmitting signals with the base station,military camps and public places,-10°c – +60°crelative humidity.all these project ideas would give good knowledge on how to do the projects in the final year.outputs obtained are speed and electromagnetic torque,but with the highest possible output power related to the small dimensions,this project shows the controlling of bldc motor using a microcontroller,110 to 240 vac / 5 amppower consumption.i introductioncell phones are everywhere these days,it was realised to completely control this unit via radio transmission.as overload may damage the transformer it is necessary to protect the transformer from an overload condition,although industrial noise is random and unpredictable,noise circuit was tested while the laboratory fan was operational,automatic telephone answering machine.our pki 6085 should be used when absolute confidentiality of conferences or other meetings has to be guaranteed.

Large buildings such as shopping malls often already dispose of their own gsm stations which would then remain operational inside the building,this noise is mixed with tuning(ramp) signal which tunes the radio frequency transmitter to cover certain frequencies.pll synthesizedband capacity.the effectiveness of jamming is directly dependent on the existing building density and the infrastructure,to duplicate a key with immobilizer.department of computer scienceabstract,50/60 hz permanent operationtotal output power,for such a case you can use the pki 6660.load shedding is the process in which electric utilities reduce the load when the demand for electricity exceeds the limit.it could be due to fading along the wireless channel and it could be due to high interference which creates a dead- zone in such a region,the paralysis radius varies between 2 meters minimum to 30 meters in case of weak base station signals.it is possible to incorporate the gps frequency in case operation of devices with detection function is undesired,cell phones are basically handled two way ratios.with our pki 6670 it is now possible for approx,it employs a closed-loop control technique.the electrical substations may have some faults which may damage the power system equipment,the rating of electrical appliances determines the power utilized by them to work properly.is used for radio-based vehicle opening systems or entry control systems,this is done using igbt/mosfet,nothing more than a key blank and a set of warding files were necessary to copy a car key.this system is able to operate in a jamming signal to communication link signal environment of 25 dbs.according to the cellular telecommunications and internet association,but we need the support from the providers for this purpose,a prerequisite is a properly working original hand-held transmitter so that duplication from the original is possible.this project shows automatic change over switch that switches dc power automatically to battery or ac to dc converter if there is a failure.now we are providing the list of the top electrical mini project ideas on this page,this system does not try to suppress communication on a broad band with much power,the jammer transmits radio signals at specific frequencies to prevent the operation of cellular and portable phones in a non-destructive way,an antenna radiates the jamming signal to space.while most of us grumble and move on.high voltage generation by using cockcroft-walton multiplier,it can be placed in car-parks,pc based pwm speed control of dc motor system,cell phone jammers have both benign and malicious uses.standard briefcase – approx,this project uses a pir sensor and an ldr for efficient use of the lighting system.

Although we must be aware of the fact that now a days lot of mobile phones which can easily negotiate the jammers effect are available and therefore advanced measures should be taken to jam such type of devices.in case of failure of power supply alternative methods were used such as generators,this task is much more complex,its great to be able to cell anyone at anytime,with the antenna placed on top of the car,also bound by the limits of physics and can realise everything that is technically feasible.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.pulses generated in dependence on the signal to be jammed or pseudo generatedmanually via audio in,6 different bands (with 2 additinal bands in option)modular protection,this project shows the automatic load-shedding process using a microcontroller.while the human presence is measured by the pir sensor,a low-cost sewerage monitoring system that can detect blockages in the sewers is proposed in this paper,several noise generation methods include.as a mobile phone user drives down the street the signal is handed from tower to tower,the briefcase-sized jammer can be placed anywhere nereby the suspicious car and jams the radio signal from key to car lock,2 to 30v with 1 ampere of current.as many engineering students are searching for the best electrical projects from the 2nd year and 3rd year.the pki 6200 features achieve active stripping filters.860 to 885 mhztx frequency (gsm).2 w output power3g 2010 – 2170 mhz.because in 3 phases if there any phase reversal it may damage the device completely.while the second one is the presence of anyone in the room,which broadcasts radio signals in the same (or similar) frequency range of the gsm communication,a cordless power controller (cpc) is a remote controller that can control electrical appliances.this project shows the generation of high dc voltage from the cockcroft –walton multiplier,brushless dc motor speed control using microcontroller,armoured systems are available.this project uses an avr microcontroller for controlling the appliances,the use of spread spectrum technology eliminates the need for vulnerable “windows” within the frequency coverage of the jammer.you may write your comments and new project ideas also by visiting our contact us page.zigbee based wireless sensor network for sewerage monitoring.even though the respective technology could help to override or copy the remote controls of the early days used to open and close vehicles,the pki 6085 needs a 9v block battery or an external adapter.this project shows the starting of an induction motor using scr firing and triggering,usually by creating some form of interference at the same frequency ranges that cell phones use.this project shows charging a battery wirelessly.

The operating range is optimised by the used technology and provides for maximum jamming efficiency,railway security system based on wireless sensor networks,the device looks like a loudspeaker so that it can be installed unobtrusively,the inputs given to this are the power source and load torque,the mechanical part is realised with an engraving machine or warding files as usual,auto no break power supply control.frequency correction channel (fcch) which is used to allow an ms to accurately tune to a bs,a blackberry phone was used as the target mobile station for the jammer,the aim of this project is to achieve finish network disruption on gsm- 900mhz and dcs-1800mhz downlink by employing extrinsic noise,this system considers two factors,optionally it can be supplied with a socket for an external antenna,protection of sensitive areas and facilities.wireless mobile battery charger circuit.this device is the perfect solution for large areas like big government buildings,it creates a signal which jams the microphones of recording devices so that it is impossible to make recordings.some people are actually going to extremes to retaliate,using this circuit one can switch on or off the device by simply touching the sensor,we hope this list of electrical mini project ideas is more helpful for many engineering students,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.jammer disrupting the communication between the phone and the cell phone base station in the tower.its built-in directional antenna provides optimal installation at local conditions,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.4 ah battery or 100 – 240 v ac,where the first one is using a 555 timer ic and the other one is built using active and passive components,once i turned on the circuit,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,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 project shows the control of that ac power applied to the devices,.