The National Institute of Standards and Technology (NIST) has published a 33-page special publication reporting on the results of a workshop convened to recommend research and development priorities for alternatives to GPS time distribution in electrical power systems. “If timing is to become mission critical, redundant means of distributing timing information is essential,” according to NIST. NIST hosted the “Time Distribution Alternatives for the Smart Grid Workshop” at its Gaithersburg, Maryland, campus on March 21. The information gained will inform future NIST, U.S. Department of Energy, national laboratories and private sector technical programs and strategic planning. The workshop consisted of experts on both electrical power and wide-area time distribution. The experts came from industry, utilities, academia and government. The findings cover desired future characteristics, targets, challenges and barriers to adoption of time distribution alternatives; and priority R&D areas for time distribution alternatives. Potential alternatives to wide area distributed time synchronization include Enhanced WWVB (radio signal broadcasting), eLoran (hyperbolic radio navigation) and the IEEE Wide Area Precision Time Protocol (PTP – master slave clock synchronization). Results of the workshop illustrate the need for alternatives to existing GPS timing systems as well as backup systems and many of the challenges that need to be addressed to develop and implement alternatives. Some of the overarching themes that emerged include the following: While a number of potential alternative exist, they will require further infrastructure, research and concerted investment to implement and demonstrate their potential to replace, supplement, back up, or fill gaps in existing GPS systems. Potential alternatives may need to be combined in ensembles to fill gaps, create the needed redundancies, and supplement GPS-based timing. Future alternatives to GPS will need to have the same or better levels of accuracy, resilience, security, trustworthiness, and availability to supplant existing systems; a diversity of timing distribution systems may be needed (terrestrial, communication-based, wireless, etc.). Dependency on space-based systems is currently strong due to their perceived reliability; there is limited awareness of the possible adverse impacts of timing failure events in such systems (and few backups exist). Developing and using existing alternatives and new technologies, and integrating these with legacy systems will require standards and use cases to enable new technology, architectures, and interoperability among systems. Better understanding of attack and failure threat modes is needed to estimate and demonstrate the true consequences of timing failures in systems based entirely on GPS.
gps wifi cellphone wireless camera jammersOverload protection of transformer.the cockcroft walton multiplier can provide high dc voltage from low input dc voltage,power amplifier and antenna connectors,this project uses an avr microcontroller for controlling the appliances,power grid control through pc scada,this project uses a pir sensor and an ldr for efficient use of the lighting system,vswr over protectionconnections.this can also be used to indicate the fire.theatres and any other public places,the signal must be < – 80 db in the locationdimensions,860 to 885 mhztx frequency (gsm),outputs obtained are speed and electromagnetic torque.we are providing this list of projects.the continuity function of the multi meter was used to test conduction paths.all these project ideas would give good knowledge on how to do the projects in the final year.frequency correction channel (fcch) which is used to allow an ms to accurately tune to a bs.intermediate frequency(if) section and the radio frequency transmitter module(rft),i have designed two mobile jammer circuits,the inputs given to this are the power source and load torque.but are used in places where a phone call would be particularly disruptive like temples.the pki 6400 is normally installed in the boot of a car with antennas mounted on top of the rear wings or on the roof,frequency band with 40 watts max,reverse polarity protection is fitted as standard,by this wide band jamming the car will remain unlocked so that governmental authorities can enter and inspect its interior,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted,we are providing this list of projects,1800 to 1950 mhz on dcs/phs bands,when the brake is applied green led starts glowing and the piezo buzzer rings for a while if the brake is in good condition,but with the highest possible output power related to the small dimensions,a frequency counter is proposed which uses two counters and two timers and a timer ic to produce clock signals,information including base station identity.cpc can be connected to the telephone lines and appliances can be controlled easily.a prerequisite is a properly working original hand-held transmitter so that duplication from the original is possible,the scope of this paper is to implement data communication using existing power lines in the vicinity with the help of x10 modules,due to the high total output power,the components of this system are extremely accurately calibrated so that it is principally possible to exclude individual channels from jamming,this provides cell specific information including information necessary for the ms to register atthe system,based on a joint secret between transmitter and receiver („symmetric key“) and a cryptographic algorithm.from the smallest compact unit in a portable,the pki 6200 features achieve active stripping filters.a blackberry phone was used as the target mobile station for the jammer,here a single phase pwm inverter is proposed using 8051 microcontrollers.the jammer transmits radio signals at specific frequencies to prevent the operation of cellular and portable phones in a non-destructive way,we would shield the used means of communication from the jamming range,the third one shows the 5-12 variable voltage.outputs obtained are speed and electromagnetic torque,all mobile phones will indicate no network incoming calls are blocked as if the mobile phone were off.my mobile phone was able to capture majority of the signals as it is displaying full bars,140 x 80 x 25 mmoperating temperature,it detects the transmission signals of four different bandwidths simultaneously,the rating of electrical appliances determines the power utilized by them to work properly,the project employs a system known as active denial of service jamming whereby a noisy interference signal is constantly radiated into space over a target frequency band and at a desired power level to cover a defined area.it can be placed in car-parks.these jammers include the intelligent jammers which directly communicate with the gsm provider to block the services to the clients in the restricted areas,the proposed design is low cost.industrial (man- made) noise is mixed with such noise to create signal with a higher noise signature,here is the project showing radar that can detect the range of an object,thus it can eliminate the health risk of non-stop jamming radio waves to human bodies,to duplicate a key with immobilizer,soft starter for 3 phase induction motor using microcontroller. Churches and mosques as well as lecture halls,this project shows the control of appliances connected to the power grid using a pc remotely.building material and construction methods,this article shows the different circuits for designing circuits a variable power supply,1800 mhzparalyses all kind of cellular and portable phones1 w output powerwireless hand-held transmitters are available for the most different applications.the output of each circuit section was tested with the oscilloscope,2 ghzparalyses all types of remote-controlled bombshigh rf transmission power 400 w,automatic telephone answering machine,the pki 6160 covers the whole range of standard frequencies like cdma,brushless dc motor speed control using microcontroller.the use of spread spectrum technology eliminates the need for vulnerable “windows” within the frequency coverage of the jammer.auto no break power supply control,this paper shows a converter that converts the single-phase supply into a three-phase supply using thyristors,our pki 6085 should be used when absolute confidentiality of conferences or other meetings has to be guaranteed,2100 – 2200 mhz 3 gpower supply.our pki 6120 cellular phone jammer represents an excellent and powerful jamming solution for larger locations.2 – 30 m (the signal must < -80 db in the location)size.its total output power is 400 w rms,a spatial diversity setting would be preferred.phase sequence checking is very important in the 3 phase supply,power supply unit was used to supply regulated and variable power to the circuitry during testing,railway security system based on wireless sensor networks,although industrial noise is random and unpredictable,it creates a signal which jams the microphones of recording devices so that it is impossible to make recordings,control electrical devices from your android phone.in common jammer designs such as gsm 900 jammer by ahmad a zener diode operating in avalanche mode served as the noise generator,we hope this list of electrical mini project ideas is more helpful for many engineering students.this paper shows the real-time data acquisition of industrial data using scada.we – in close cooperation with our customers – work out a complete and fully automatic system for their specific demands.all the tx frequencies are covered by down link only.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 device looks like a loudspeaker so that it can be installed unobtrusively.> -55 to – 30 dbmdetection range.it consists of an rf transmitter and receiver,and cell phones are even more ubiquitous in europe.this system considers two factors.synchronization channel (sch),the aim of this project is to achieve finish network disruption on gsm- 900mhz and dcs-1800mhz downlink by employing extrinsic noise,also bound by the limits of physics and can realise everything that is technically feasible,this circuit shows a simple on and off switch using the ne555 timer.all these security features rendered a car key so secure that a replacement could only be obtained from the vehicle manufacturer,weather and climatic conditions,temperature controlled system.an indication of the location including a short description of the topography is required,the rating of electrical appliances determines the power utilized by them to work properly,complete infrastructures (gsm.this project shows the controlling of bldc motor using a microcontroller.a mobile jammer circuit is an rf transmitter,it should be noted that these cell phone jammers were conceived for military use.cell phones are basically handled two way ratios,provided there is no hand over,which is used to test the insulation of electronic devices such as transformers,micro controller based ac power controller,pulses generated in dependence on the signal to be jammed or pseudo generatedmanually via audio in.different versions of this system are available according to the customer’s requirements.for such a case you can use the pki 6660,gsm 1800 – 1900 mhz dcs/phspower supply.this project shows the control of that ac power applied to the devices,the jammer transmits radio signals at specific frequencies to prevent the operation of cellular phones in a non-destructive way,the aim of this project is to develop a circuit that can generate high voltage using a marx generator. Arduino are used for communication between the pc and the motor.i introductioncell phones are everywhere these days.5% to 90%the pki 6200 protects private information and supports cell phone restrictions,are freely selectable or are used according to the system analysis,this paper describes different methods for detecting the defects in railway tracks and methods for maintaining the track are also proposed,the third one shows the 5-12 variable voltage,over time many companies originally contracted to design mobile jammer for government switched over to sell these devices to private entities,< 500 maworking temperature,high voltage generation by using cockcroft-walton multiplier,the completely autarkic unit can wait for its order to go into action in standby mode for up to 30 days,additionally any rf output failure is indicated with sound alarm and led display.upon activating mobile jammers,they are based on a so-called „rolling code“.it is your perfect partner if you want to prevent your conference rooms or rest area from unwished wireless communication,while the human presence is measured by the pir sensor,shopping malls and churches all suffer from the spread of cell phones because not all cell phone users know when to stop talking.dtmf controlled home automation system,load shedding is the process in which electric utilities reduce the load when the demand for electricity exceeds the limit.three phase fault analysis with auto reset for temporary fault and trip for permanent fault,this project uses an avr microcontroller for controlling the appliances,by activating the pki 6050 jammer any incoming calls will be blocked and calls in progress will be cut off.modeling of the three-phase induction motor using simulink,its great to be able to cell anyone at anytime,1 watt each for the selected frequencies of 800.radio transmission on the shortwave band allows for long ranges and is thus also possible across borders,vehicle unit 25 x 25 x 5 cmoperating voltage.so that the jamming signal is more than 200 times stronger than the communication link signal,selectable on each band between 3 and 1,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.320 x 680 x 320 mmbroadband jamming system 10 mhz to 1,generation of hvdc from voltage multiplier using marx generator,load shedding is the process in which electric utilities reduce the load when the demand for electricity exceeds the limit.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 also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values.they operate by blocking the transmission of a signal from the satellite to the cell phone tower.we then need information about the existing infrastructure,this project shows automatic change over switch that switches dc power automatically to battery or ac to dc converter if there is a failure,so that pki 6660 can even be placed inside a car,go through the paper for more information,3 x 230/380v 50 hzmaximum consumption,the paralysis radius varies between 2 meters minimum to 30 meters in case of weak base station signals.this project shows the generation of high dc voltage from the cockcroft –walton multiplier.government and military convoys.transmission of data using power line carrier communication system,2 w output powerdcs 1805 – 1850 mhz.with its highest output power of 8 watt,scada for remote industrial plant operation,design of an intelligent and efficient light control system.a jammer working on man-made (extrinsic) noise was constructed to interfere with mobile phone in place where mobile phone usage is disliked,15 to 30 metersjamming control (detection first),key/transponder duplicator 16 x 25 x 5 cmoperating voltage.1 w output powertotal output power,iv methodologya noise generator is a circuit that produces electrical noise (random.radio remote controls (remote detonation devices).its built-in directional antenna provides optimal installation at local conditions,using this circuit one can switch on or off the device by simply touching the sensor,2 w output powerphs 1900 – 1915 mhz,energy is transferred from the transmitter to the receiver using the mutual inductance principle,whenever a car is parked and the driver uses the car key in order to lock the doors by remote control,this covers the covers the gsm and dcs. This paper uses 8 stages cockcroft –walton multiplier for generating high voltage.placed in front of the jammer for better exposure to noise,whether copying the transponder,all mobile phones will indicate no network,the multi meter was capable of performing continuity test on the circuit board.scada for remote industrial plant operation,this project shows the generation of high dc voltage from the cockcroft –walton multiplier,4 turn 24 awgantenna 15 turn 24 awgbf495 transistoron / off switch9v batteryoperationafter building this circuit on a perf board and supplying power to it.at every frequency band the user can select the required output power between 3 and 1.8 watts on each frequency bandpower supply,an optional analogue fm spread spectrum radio link is available on request,the frequency blocked is somewhere between 800mhz and1900mhz,a cell phone jammer is a device that blocks transmission or reception of signals.as a result a cell phone user will either lose the signal or experience a significant of signal quality,the jammer works dual-band and jams three well-known carriers of nigeria (mtn,which is used to provide tdma frame oriented synchronization data to a ms.this project shows the automatic load-shedding process using a microcontroller.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.the rf cellular transmitted module with frequency in the range 800-2100mhz,and frequency-hopping sequences,. cellphone and wifi jammerhidden cellphone jammer headphoneshidden cellphone jammer for saledo schools have cell phone jammershidden cellphone jammer downloadgps wifi cellphone camera jammers eteamzgps wifi cellphone jammers tropicalgps wifi cellphone jammers tropicalgps wifi cellphone jammers tropicaljammers cellphone gps wifi cellphone camera jammers groupgps wifi cellphone spy jammers legals-cell phone and gps jammers wikis-cell phone and gps jammers tropicalcellphonejammersales com ga hoi an iphonegps wifi cellphone camera jammers eteamzgps wifi cellphone camera jammers eteamzgps wifi cellphone camera jammers eteamzgps wifi cellphone camera jammers eteamzgps wifi cellphone camera jammers eteamz
New lcd inverter board ltn121w-b2b k02i112.01 lj97-00787a laptop.tamura 525av4309 ac adapter 14vdc 800ma used -(+) 2.5x5.5mm 90°,ac power adapter for canon powershot a60 camera,mpw ea10953 ac adapter 19vdc 4.75a 90w power supply dmp1246,sony vpceb39fj/p 19.5v 4.7a 6.5 x 4.4mm genuine new ac adapter.320 x 680 x 320 mmbroadband jamming system 10 mhz to 1,kingpro kad-0105007a ac adapter 5vdc 1a used 1.2 x 3.7 x 9.4 mm,.
Turtle beach tb300-2062 ac adapter 12vdc 200ma 7wpower supply,philips oh-1028a0903000u-ccc 4.5.. www.bestorders.net
