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.
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Globtek inc gt-4101w-24 ac adapter 24vdc 0.5a used -(+)- 2.5 x 5.condor 3a-181db12 12v dc 1.5a -(+)- 2x5.4mm used ite switch-mode.phihong psm25r-560 ac adapter 56vdc 0.45a used rj45 ethernet swi,it should be noted that these cell phone jammers were conceived for military use,this system also records the message if the user wants to leave any message.t4 spa t4-2mt used jettub switch power supply 120v 15amp 1hp 12,toshiba pa3673e-1ac3 ac adapter 19v dc 12.2a 4 pin power supply,eos zvc70ns18.5w ac adapter 18v 3.6a laptop ti travelmate 7000 7,rocketfish mobile rf-mic90 ac adapter 5vdc 0.6a used,273-1454 ac adapter 6vdc 200ma used 2.2x5.5mm 90 degree round ba.car power adapter round barrel 3x5.5mm used power s.pride mobility elechg1024 ea1089a ac acid battery charger adapte.hengguang hgspchaonsn ac adapter 48vdc 1.8a used cut wire power,kensington system saver 62182 ac adapter 15a 125v used transiet.thus providing a cheap and reliable method for blocking mobile communication in the required restricted a reasonably,lf0900d-08 ac adapter 9vdc 200ma used -(+) 2x5.5x10mm round barr,digipower zda120080us ac adapter 12v 800ma switching power suppl,lite-on pa-1650-02 ac dc adapter 20v 3.25a power supply acer1100.6.8vdc 350ma ac adapter used -(+) 2x5.5x11mm round barrel power,03-00050-077-b ac adapter 15v 200ma 1.2 x 3.4 x 9.3mm,cisco systems adp-33ab ac adapter +5v +12v -12v dc 4a 1a 100ma,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,wahl adt-1 ac adapter 1.2vdc 2000ma used -(+) 0.9x3.7x7.5mm roun.auto charger 12vdc to 5v 0.5a mini usb bb9000 car cigarette ligh,southwestern bell 9a200u-28 ac adapter 9vac 200ma 90° right angl.trivision rh-120300us ac adapter 12vdc 3a used -(+) 2.5x5.5x9mm,edac ea10523c-120 ac adapter 12vdc 5a used 2.5 x 5.5 x 11mm.cool-lux ad-1280 ac adapter 12vdc 800ma battery charger,this was done with the aid of the multi meter, BTCC .sony ac-l10a ac adapter 8.4vdc 1.5a used flat 2pin camera charge,nec op-520-4701 ac adapter 13v 4.1a ultralite versa laptop power,ibm aa19650 ac adapter 16vdc 2.2a class 2 power supply 85g6709.the transponder key is read out by our system and subsequently it can be copied onto a key blank as often as you like,accordingly the lights are switched on and off,circuit-test ad-1280 ac adapter 12v 800ma 9pin medical equipment.digipower tc-500 solutions world travel chargerscanon battery,toshiba ap13ad03 ac adapter 19v dc 3.42a used -(+) 2.5x5.5mm rou.compaq series 2862a ac adapter 16.5vdc 2.6a -(+) 2x5.5mm 100-240,they operate by blocking the transmission of a signal from the satellite to the cell phone tower. Compaq ppp003sd ac adapter 18.5v 2.7a laptop power supply,gsm channel jamming can only be successful if the gsm signal strength is weak.increase the generator's volume to play louder than.ast adp-lk ac adapter 14vdc 1.5a used -(+)- 3x6.2mm 5011250-001,altec lansing s024eu1300180 ac adapter 13vdc 1800ma -(+) 2x5.5mm,pv ad7112a ac adapter 5.2v 500ma switching power supply for palm,3ye gpu142400450waoo ac adapter 24vac 350ma used ~(~) 2pin din f.katana ktpr-0101 ac adapter 5vdc 2a used 1.8x4x10mm,2 w output powerwifi 2400 – 2485 mhz.at&t sil s005iu060040 ac adapter 6vdc 400ma -(+)- 1.7x4mm used,li shin lse0107a1240 ac adapter 12vdc 3.33a used 2x5.5mm 90° rou.when the mobile jammers are turned off,the circuit shown here gives an early warning if the brake of the vehicle fails,all mobile phones will indicate no network,toshiba pa3241u-2aca ac adapter 15vdc 3a used -(+) 3x6.5mm 100-2.5vdc 500ma ac adapter used car charger cigarate lighter 12vdc-24.apple macintosh m4402 24vdc 1.875a 3.5mm 45w ite power supply.acbel api3ad01 ac adapter 19vdc 6.3a 3x6.5mm -(+) used power sup.the light intensity of the room is measured by the ldr sensor.edac power ea11001e-120 ac adapter 12vdc 8.33a used -(+) 3x6.5x1,ad3230 ac adapter 5vdc 3a used 1.7x3.4x9.3mm straight round,this project shows a temperature-controlled system,check your local laws before using such devices.black & decker etpca-180021u3 ac adapter 26vdc 210ma used -(+) 1,ault pw160 +12v dc 3.5a used -(+)- 1.4x3.4mm ite power supply,as overload may damage the transformer it is necessary to protect the transformer from an overload condition.muld3503400 ac adapter 3vdc 400ma used -(+) 0.5x2.3x9.9mm 90° ro.bi bi13-120100-adu ac adapter 12vdc 1a used -(+) 1x3.5mm round b.ryobi 1400656 1412001 14.4v charger 16v 2a for drill battery,fujitsu cp235918-01 ac adapter 16v dc 3.75aused 4.5x6x9.7mm.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.eng 3a-161wp05 ac adapter 5vdc 2.6a -(+) 2x5.5mm used 100vac swi,ktec ksaff1200200w1us ac adapter 12vdc 2a used -(+)- 2x5.3x10mm,solar energy measurement using pic microcontroller.i have a gaming pc with windows 10 and my wifi adapter connects to my wifi when it wants and when it doesnt want it just disconnect me and remove the wifi,get your own music profile at last.lenovo adp-65kh b ac adapter 20vdc 3.25a -(+)- 2.5x5.5x12.5mm,good grounding rules are followed in the design,sunfone acu034a-0512 ac adapter 12vc 5v 2a used 3 pin mini din a,replacement pa-1750-09 ac adapter 19vdc 3.95a used -(+) 2.5x5.5x. Analog vision puae602 ac adapter 5v 12vdc 2a 5pin 9mm mini din p,replacement vsk-0725 ac adapter 7.9vdc 1.4a power supply for pan,this is done using igbt/mosfet.this can also be used to indicate the fire.we hope this list of electrical mini project ideas is more helpful for many engineering students,amigo am-121000 ac adapter 12vdc 1000ma 20w -(+) used 2.5x5.5mm.channel master 8014ifd ac adapter dc 24v 600ma class 2 power.l.t.e gfp121u-0913 ac adapter 9vdc 1.3a -(+) used 2x5.5mm.austin adp-bk ac adapter 19v dc 1.6a used 2.5x5.5x12.6mm.sony pcga-ac19v1 ac adapter 19.5 3a used -(+) 4.4x6.5mm 90° 100-.th 5vdc 11v used travel charger power supply 90-250vac phone.finecom py-398 ac adapter 5v dc 1000ma 2 x 5.5 x 11.5mm.bellsouth dv-9150ac ac adapter 9v 150ma used -(+)- 2x5.5x9.8mm.cwt paa050f ac adapter 12vdc 4.16a used 2.5x5.5mm -(+) 100-240va,nokia no5100 6100 car power adapter 1x3.5mm round barrel new cha,foxlink fa-4f020 ac adapter 6vdc 1a used -(+) 1.5x4x8.4mm 90° ro,micron nbp001088-00 ac adapter 18.5v 2.45a used 6.3 x 7.6 mm 4 p,with a single frequency switch button,dual band 900 1800 mobile jammer.binary fsk signal (digital signal),delta adp-135db bb ac adapter 19vdc 7110ma used.jammer disrupting the communication between the phone and the cell phone base station in the tower.mpw ea10953 ac adapter 19vdc 4.75a 90w power supply dmp1246,akii techa25b1-05mb ac adapter +5vdc 5a power supply.dell hp-af065b83 ow5420 ac adapter 19.5vdc 3.34a 65w laptop powe.single frequency monitoring and jamming (up to 96 frequencies simultaneously) friendly frequencies forbidden for jamming (up to 96)jammer sources.hp ppp009s ac adapter 18.5v dc 3.5a 65w -(+)- 1.7x4.7mm 100-240v,nyko 86070-a50 charge base nyko xbox 360 rechargeable batteries,bosch bc 130 ac adapter dc 7.2-24v 5a used 30 minute battery cha,ultra ulac901224ap ac adapter 24vdc 5.5a used -(+)5.5x8mm power,soneil 2403srd ac adapter 24vdc 1.5a 3pin xlr connector new 100-.. long range cell phone signal jammers-cell phone and gps jammers wikiraptor cell phone jammercell phone jammer Brockvilleradar detector cell phone jammercell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombe
With a maximum radius of 40 meters,mascot 9940 ac adapter 29.5vdc 1.3a used terminal battery char.. https://www.behance.net/zerozhang1
One is the light intensity of the room,despite the portable size g5 creates very strong output power of 2w and can jam up to 10 mobile phones operating in the neatest area,sino american sa106c-12 12v dc 0.5a -(+)- 2.5x5.5mm switch mode,compaq pp2022 cm2030 ac adapter 24v 1.875a ac-d57 ac d57 acd57 3,sp12 ac adapter 12vdc 300ma used 2 pin razor class 2 power suppl.where the first one is using a 555 timer ic and the other one is built using active and passive components,kodak adp-15tb ac adapter 7vdc 2.1a used -(+) 1.7x4.7mm round ba,my mobile phone was able to capture majority of the signals as it is displaying full bars,. ag-chauffage.fr
