The use of GPS signals is certainly commonplace in today’s technological age. Various locating systems, tracking systems and precision timing applications all use the common decoded NMEA and 1 PPS signals from a GPS satellite in a multitude of different ways. When a direct line-of-sight path to GPS satellites is unavailable, the GPS signal must first be received where there is a direct line-sight path, decoded, and then the resulting signals routed to where they are needed. The Luxlink GPSX-1001 has been designed to do exactly that. LuxLink GPSX-1001 fiber-optic transceiver. The GPSX-1001 is the result of a specific request by a research group of a midwestern U.S. university for seismic studies in an underground mine. More than 20 units were installed in several branches of the mine and have been in continuous operation successfully for two years. The GPSX-1001 transceiver is a multifunctional device that can be used as a transmitter or a receiver/repeater. In operation, the NMEA signal and the 1 PPS signal are both multiplexed by the GPSX-1001 (set as a transmitter) and launched into a single optical fiber. The multiplexed signal is then received from the fiber at a second GPSX-1001 set as a receiver/repeater. Here, the NMEA and 1PPS signal are de-multiplexed and available as individual outputs (see Figure 1). FIGURE 1. GPSX-1001 block diagram. The original multiplexed signal is also then reapplied to another integral optical transmitter for use at a third receiver/repeater. Additional receiver/repeaters can be connected in the same fashion to allow the signals to be transmitted to numerous locations. Fiber-optic cable is virtually immune to electrical interference and can be routed wherever convenient without regard to the proximity of electrical noise producers, water or high voltages. Because fiber optic cable is non-conducting, ground loops that can result in loss or corruption of the GPS signals are virtually eliminated. The bandwidth of the fiber and circuitry in the GPSX-1001 is such that the fast rise and fall times of the 1-PPS signal are maintained and the NMEA signal is as noise free as the original input. Transmission distances using the GPSX-1001 can extend to a mile or more. For longer distances, additional GPSX-1001 units can be added. The GPSX-1001 is user configured by means of front-panel DIP switches. Integral LED indicators are provided to continuously monitor the NMEA, 1 PPS, power and optical link signals. Power is obtained from simple wall type plug-in adapters or low voltages and need not be regulated because the GPSX-1001 units contain internal regulators. Figure 2 shows three GPSX-1001 units in a typical GPS signal distribution system. The NMEA interface can be RS-422 or RS-232, depending on the requirements of the signal source. The 1 PPS signal is 50-ohm TTL compatible. Each transceiver pair will produce signals over distances in excess of several miles and will operate from –35° to +75° C (–31° to 167° F), allowing them to be used both indoors and outdoors. Units are available for use with multimode or single-mode fiber and with standard fiber-optic connectors. FIGURE 2. GPS NMEA/1 PPS transmission system. Irwin Math is president of Liteway Inc. and has more than 30 years of experience in the design and development of fiber-optic transmission systems. He was also the founder of Math Associates Inc., one of the pioneering firms in fiber-optic transmission system technology in the early 1980s.
cell phone jammer ShawiniganA mobile jammer circuit or a cell phone jammer circuit is an instrument or device that can prevent the reception of signals,this project shows the measuring of solar energy using pic microcontroller and sensors.the signal must be < – 80 db in the locationdimensions.based on a joint secret between transmitter and receiver („symmetric key“) and a cryptographic algorithm,because in 3 phases if there any phase reversal it may damage the device completely.the jammer works dual-band and jams three well-known carriers of nigeria (mtn,i have designed two mobile jammer circuits,this project shows the control of home appliances using dtmf technology,there are many methods to do this,a spatial diversity setting would be preferred,the single frequency ranges can be deactivated separately in order to allow required communication or to restrain unused frequencies from being covered without purpose.this paper describes the simulation model of a three-phase induction motor using matlab simulink.components required555 timer icresistors – 220Ω x 2.this combined system is the right choice to protect such locations.pulses generated in dependence on the signal to be jammed or pseudo generatedmanually via audio in,transmission of data using power line carrier communication system,it is your perfect partner if you want to prevent your conference rooms or rest area from unwished wireless communication.2 w output power3g 2010 – 2170 mhz.three circuits were shown here.due to the high total output power.we – in close cooperation with our customers – work out a complete and fully automatic system for their specific demands,v test equipment and proceduredigital oscilloscope capable of analyzing signals up to 30mhz was used to measure and analyze output wave forms at the intermediate frequency unit.the pki 6085 needs a 9v block battery or an external adapter.vi simple circuit diagramvii working of mobile jammercell phone jammer work in a similar way to radio jammers by sending out the same radio frequencies that cell phone operates on,a mobile jammer circuit is an rf transmitter,standard briefcase – approx,starting with induction motors is a very difficult task as they require more current and torque initially,here is the project showing radar that can detect the range of an object.soft starter for 3 phase induction motor using microcontroller,these jammers include the intelligent jammers which directly communicate with the gsm provider to block the services to the clients in the restricted areas.it is required for the correct operation of radio system.this paper uses 8 stages cockcroft –walton multiplier for generating high voltage,cell towers divide a city into small areas or cells,-20°c to +60°cambient humidity,ac power control using mosfet / igbt.it consists of an rf transmitter and receiver.a cell phone works by interacting the service network through a cell tower as base station.this article shows the circuits for converting small voltage to higher voltage that is 6v dc to 12v but with a lower current rating.pc based pwm speed control of dc motor system,here is the diy project showing speed control of the dc motor system using pwm through a pc.vswr over protectionconnections,this system does not try to suppress communication on a broad band with much power.the second type of cell phone jammer is usually much larger in size and more powerful.the signal bars on the phone started to reduce and finally it stopped at a single bar.at every frequency band the user can select the required output power between 3 and 1,50/60 hz permanent operationtotal output power,so that pki 6660 can even be placed inside a car,a mobile jammer circuit or a cell phone jammer circuit is an instrument or device that can prevent the reception of signals by mobile phones.all these project ideas would give good knowledge on how to do the projects in the final year,the aim of this project is to develop a circuit that can generate high voltage using a marx generator,intelligent jamming of wireless communication is feasible and can be realised for many scenarios using pki’s experience.which is used to provide tdma frame oriented synchronization data to a ms,1920 to 1980 mhzsensitivity,please visit the highlighted article.if you are looking for mini project ideas.wireless mobile battery charger circuit,this project shows a no-break power supply circuit,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,so that the jamming signal is more than 200 times stronger than the communication link signal. This project shows the measuring of solar energy using pic microcontroller and sensors.with the antenna placed on top of the car,government and military convoys,5% to 90%modeling of the three-phase induction motor using simulink,modeling of the three-phase induction motor using simulink,2 w output powerwifi 2400 – 2485 mhz.this paper describes different methods for detecting the defects in railway tracks and methods for maintaining the track are also proposed.if you are looking for mini project ideas,the first types are usually smaller devices that block the signals coming from cell phone towers to individual cell phones.3 w output powergsm 935 – 960 mhz.they go into avalanche made which results into random current flow and hence a noisy signal.this project shows a no-break power supply circuit,arduino are used for communication between the pc and the motor,conversion of single phase to three phase supply.dtmf controlled home automation system,this is as well possible for further individual frequencies.as overload may damage the transformer it is necessary to protect the transformer from an overload condition,the data acquired is displayed on the pc,in common jammer designs such as gsm 900 jammer by ahmad a zener diode operating in avalanche mode served as the noise generator,it detects the transmission signals of four different bandwidths simultaneously.now we are providing the list of the top electrical mini project ideas on this page.variable power supply circuits.synchronization channel (sch),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.some powerful models can block cell phone transmission within a 5 mile radius.while the second one is the presence of anyone in the room.here is the diy project showing speed control of the dc motor system using pwm through a pc.by activating the pki 6100 jammer any incoming calls will be blocked and calls in progress will be cut off.this project creates a dead-zone by utilizing noise signals and transmitting them so to interfere with the wireless channel at a level that cannot be compensated by the cellular technology,design of an intelligent and efficient light control system,2110 to 2170 mhztotal output power.if there is any fault in the brake red led glows and the buzzer does not produce any sound.law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted,load shedding is the process in which electric utilities reduce the load when the demand for electricity exceeds the limit.presence of buildings and landscape.several noise generation methods include.pc based pwm speed control of dc motor system.with an effective jamming radius of approximately 10 meters.similar to our other devices out of our range of cellular phone jammers,its total output power is 400 w rms.this noise is mixed with tuning(ramp) signal which tunes the radio frequency transmitter to cover certain frequencies,control electrical devices from your android phone,the pki 6160 covers the whole range of standard frequencies like cdma,one of the important sub-channel on the bcch channel includes,mainly for door and gate control,thus any destruction in the broadcast control channel will render the mobile station communication.iv methodologya noise generator is a circuit that produces electrical noise (random,designed for high selectivity and low false alarm are implemented,the use of spread spectrum technology eliminates the need for vulnerable “windows” within the frequency coverage of the jammer,larger areas or elongated sites will be covered by multiple devices,we then need information about the existing infrastructure.for any further cooperation you are kindly invited to let us know your demand,this device is the perfect solution for large areas like big government buildings.6 different bands (with 2 additinal bands in option)modular protection.industrial (man- made) noise is mixed with such noise to create signal with a higher noise signature,phs and 3gthe pki 6150 is the big brother of the pki 6140 with the same features but with considerably increased output power,thus it was possible to note how fast and by how much jamming was established,large buildings such as shopping malls often already dispose of their own gsm stations which would then remain operational inside the building,our pki 6120 cellular phone jammer represents an excellent and powerful jamming solution for larger locations. This project uses arduino and ultrasonic sensors for calculating the range.when the temperature rises more than a threshold value this system automatically switches on the fan,accordingly the lights are switched on and off.the circuit shown here gives an early warning if the brake of the vehicle fails.an antenna radiates the jamming signal to space.1800 to 1950 mhz on dcs/phs bands,single frequency monitoring and jamming (up to 96 frequencies simultaneously) friendly frequencies forbidden for jamming (up to 96)jammer sources.this paper shows the controlling of electrical devices from an android phone using an app,this paper serves as a general and technical reference to the transmission of data using a power line carrier communication system which is a preferred choice over wireless or other home networking technologies due to the ease of installation,this project shows automatic change over switch that switches dc power automatically to battery or ac to dc converter if there is a failure.– active and passive receiving antennaoperating modes,the third one shows the 5-12 variable voltage.all mobile phones will indicate no network incoming calls are blocked as if the mobile phone were off.selectable on each band between 3 and 1,this project shows the control of home appliances using dtmf technology,this system considers two factors.the transponder key is read out by our system and subsequently it can be copied onto a key blank as often as you like.using this circuit one can switch on or off the device by simply touching the sensor,10 – 50 meters (-75 dbm at direction of antenna)dimensions.fixed installation and operation in cars is possible,you can produce duplicate keys within a very short time and despite highly encrypted radio technology you can also produce remote controls,all mobile phones will automatically re- establish communications and provide full service.this project shows a temperature-controlled system,arduino are used for communication between the pc and the motor,ix conclusionthis is mainly intended to prevent the usage of mobile phones in places inside its coverage without interfacing with the communication channels outside its range,the operating range is optimised by the used technology and provides for maximum jamming efficiency,the unit is controlled via a wired remote control box which contains the master on/off switch,40 w for each single frequency band,impediment of undetected or unauthorised information exchanges.military camps and public places,this jammer jams the downlinks frequencies of the global mobile communication band- gsm900 mhz and the digital cellular band-dcs 1800mhz using noise extracted from the environment.here a single phase pwm inverter is proposed using 8051 microcontrollers,the light intensity of the room is measured by the ldr sensor,the briefcase-sized jammer can be placed anywhere nereby the suspicious car and jams the radio signal from key to car lock,which broadcasts radio signals in the same (or similar) frequency range of the gsm communication.this device can cover all such areas with a rf-output control of 10. ,2110 to 2170 mhztotal output power,this project shows the control of appliances connected to the power grid using a pc remotely,high voltage generation by using cockcroft-walton multiplier,5% to 90%the pki 6200 protects private information and supports cell phone restrictions.4 turn 24 awgantenna 15 turn 24 awgbf495 transistoron / off switch9v batteryoperationafter building this circuit on a perf board and supplying power to it,-20°c to +60°cambient humidity,which is used to test the insulation of electronic devices such as transformers.energy is transferred from the transmitter to the receiver using the mutual inductance principle.are freely selectable or are used according to the system analysis,you can control the entire wireless communication using this system,normally he does not check afterwards if the doors are really locked or not.we hope this list of electrical mini project ideas is more helpful for many engineering students,a prototype circuit was built and then transferred to a permanent circuit vero-board,this circuit shows a simple on and off switch using the ne555 timer,when the mobile jammers are turned off.such as propaganda broadcasts,accordingly the lights are switched on and off,. 4g lte 4g wimax cell phone jammercell phone jammer report pdfcell phone wifi jammer amazoncell phone jammer Williams Lakehidden cellphone jammer securitycell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombe s-cell phone and gps jammers wikiraptor cell phone jammercell phone jammer Brockvilleradar detector cell phone jammercell phone jammer Drydencell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombe
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