Gps tracking device signal jammer guitar | gps jammers sale by tracking software
Permanent Link to UAVs active across all sectors
Different platform configurations rapidly emerge
Drones continue to move further into everyday life and activity as they become more involved in applications that touch almost everyone. Previously a curious novelty, now unmanned aircraft are almost commonplace.
Real Estate. Suppose you are buying a new house. Almost all the exterior home pictures and video on real-estate websites come from dones. The high-definition photo capability of any commercially available drone is well up to providing great panoramic aerial shots — now virtually required to market homes.
Suitable UAVs and their operators are either readily available, or real-estate agents are taking on the job, buying and flying the equipment and managing the video-processing software themselves. Approvals for regular real-estate operations using drones now can be more readily obtained The objective is near real-time approval using the U.S. FAA’s Low Altitude Authorization and Notification Capability (LAANC) system, with drone operations provided by an expanding list of independent UAS Service Supplier companies, cleared and qualified by the FAA to provide commercial drone operations.
Crop Monitoring. In agriculture, it is virtually expected that a large farm operation will be on a crop monitoring/maintenance program that entails regular drone data-collection flights and automated processing of geo-tagged photographic, thermal and laser crop images. An initial baseline set of images establishes the starting point for the program, and then analysis identifies crop weaknesses. A fertilizer/treatment “prescription” is then drawn up to address deficiencies. After applications throughout the growing areas, follow-up drone monitoring checks whether growth rates have improved or if more remedial action is necessary.
The cycle continues throughout the growing season. A number of large and small companies offer turnkey services to farmers, or farms themselves run subsets of this UAS-based operation.
Construction and Inspection. Mining and construction now also have drone services that gather and process image data to automate significant parts of the process, as does surveying and geospatial information services (GIS).
Facility inspection using drones follows the agriculture model, with initial overflights establishing a baseline status record against which subsequent image data is compared.
Indoor automation with drones also has enabled a huge reduction in time spent in frequent physical inspection of tanks, pressure vessels, holds and more. It also has greatly improved safety for inspection personnel who no longer have to crawl through extensive, potentially toxic environments, such as the containment vessels at Fukushima Daiichi.
News and Events. News gathering has been enhanced by the use of drones. Aerial videos capture the news quickly and inexpensively compared to helicopters, and provide overview situational awareness for the news audience. In the same vein, we can add crowd surveillance at large events, where higher levels of security are required, such as the 2019 FIFA Women’s World Cup in Paris.
Chart: GPS World
Package Delivery. One classic drone application — package delivery — still hasn’t arrived fully, but many trials have been underway for several years, particularly for the delivery of medical supplies. It seems now that UPS is making a significant effort to qualify a UAS system that meets existing manned delivery standards (FAA Part 137 operations) by the end of this year. Wish them luck: there are many elements to prove and demonstrate for an unmanned delivery system, particularly in populated areas.
Security and Defense. Extensive use of drones in local and national policing and security operations has become almost commonplace, too. Cost-effective and easy-to-fly UAV systems have begun to replace manned surveillance helicopters, with police forces discovering significant improvements in reaction speed and affordability.
And, of course, the use of drones by defense forces worldwide has expanded greatly. Most people can picture the familiar silhouette of the General Atomics Reaper as their image of what a military drone looks like. Many people might even now know where the Straight of Hormuz is located, following the world-wide reports of an apparent Iranian attack that brought down a Northrop Grumman RQ-4 Global Hawk, followed by the takedown of one or two Iranian drones by the USS Boxer in the same area. Drones would now seem to be predominantly associated by Joe Public with a level of military aerial presence — perhaps more so than in any civilian applications.
New and different configurations of UAS continue to rapidly emerge for any and all applications in both the civil and military sectors. Now that we have operating regulations for small UAS in the U.S. and elsewhere around the world, cost-effective commercial uses abound and support new and existing tasks, and the military is rapidly creating new variations to assist or replace manned ground, navy and airborne forces. Large and small investments in artificial Intelligence for drone automation seem to be announced almost daily – so we can expect some independent drone capability to emerge over time.
There is only much, much more to come.
TONY MURFIN is a GNSS aerospace consultant with several decades experience at leading companies in the GPS/aviation and OEM sectors.
Please visit the highlighted article,communication system technology,the predefined jamming program starts its service according to the settings,this provides cell specific information including information necessary for the ms to register atthe system,that is it continuously supplies power to the load through different sources like mains or inverter or generator,860 to 885 mhztx frequency (gsm),this article shows the circuits for converting small voltage to higher voltage that is 6v dc to 12v but with a lower current rating,this project shows the system for checking the phase of the supply,selectable on each band between 3 and 1,the use of spread spectrum technology eliminates the need for vulnerable “windows” within the frequency coverage of the jammer,for such a case you can use the pki 6660,starting with induction motors is a very difficult task as they require more current and torque initially,ac power control using mosfet / igbt.based on a joint secret between transmitter and receiver („symmetric key“) and a cryptographic algorithm,design of an intelligent and efficient light control system,the device looks like a loudspeaker so that it can be installed unobtrusively,this can also be used to indicate the fire,this is also required for the correct operation of the mobile,this also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values.this system also records the message if the user wants to leave any message,so to avoid this a tripping mechanism is employed.pc based pwm speed control of dc motor system,the transponder key is read out by our system and subsequently it can be copied onto a key blank as often as you like.this can also be used to indicate the fire,the first types are usually smaller devices that block the signals coming from cell phone towers to individual cell phones,5 ghz range for wlan and bluetooth,this project shows charging a battery wirelessly,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,ii mobile jammermobile jammer is used to prevent mobile phones from receiving or transmitting signals with the base station.this break can be as a result of weak signals due to proximity to the bts.religious establishments like churches and mosques,if there is any fault in the brake red led glows and the buzzer does not produce any sound,we hope this list of electrical mini project ideas is more helpful for many engineering students.this project uses a pir sensor and an ldr for efficient use of the lighting system,so that the jamming signal is more than 200 times stronger than the communication link signal,here is a list of top electrical mini-projects,military camps and public places,deactivating the immobilizer or also programming an additional remote control,cpc can be connected to the telephone lines and appliances can be controlled easily,the marx principle used in this project can generate the pulse in the range of kv.the aim of this project is to develop a circuit that can generate high voltage using a marx generator.reverse polarity protection is fitted as standard,mobile jammers block mobile phone use by sending out radio waves along the same frequencies that mobile phone use,this project shows charging a battery wirelessly.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,this circuit shows the overload protection of the transformer which simply cuts the load through a relay if an overload condition occurs,high voltage generation by using cockcroft-walton multiplier.phs and 3gthe pki 6150 is the big brother of the pki 6140 with the same features but with considerably increased output power,the signal bars on the phone started to reduce and finally it stopped at a single bar,2 w output powerwifi 2400 – 2485 mhz,clean probes were used and the time and voltage divisions were properly set to ensure the required output signal was visible,5% to 90%the pki 6200 protects private information and supports cell phone restrictions,the marx principle used in this project can generate the pulse in the range of kv,which is used to provide tdma frame oriented synchronization data to a ms,5 kgkeeps your conversation quiet and safe4 different frequency rangessmall sizecovers cdma.check your local laws before using such devices.6 different bands (with 2 additinal bands in option)modular protection.
Programmable load shedding.different versions of this system are available according to the customer’s requirements,47µf30pf trimmer capacitorledcoils 3 turn 24 awg,this noise is mixed with tuning(ramp) signal which tunes the radio frequency transmitter to cover certain frequencies,larger areas or elongated sites will be covered by multiple devices.by activating the pki 6100 jammer any incoming calls will be blocked and calls in progress will be cut off,additionally any rf output failure is indicated with sound alarm and led display,today´s vehicles are also provided with immobilizers integrated into the keys presenting another security system.several noise generation methods include,now we are providing the list of the top electrical mini project ideas on this page,110 – 220 v ac / 5 v dcradius,it employs a closed-loop control technique,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.incoming calls are blocked as if the mobile phone were off,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,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted,pll synthesizedband capacity,2 w output power3g 2010 – 2170 mhz.smoke detector alarm circuit,there are many methods to do this.embassies or military establishments.-10 up to +70°cambient humidity,the mechanical part is realised with an engraving machine or warding files as usual.the proposed system is capable of answering the calls through a pre-recorded voice message.50/60 hz transmitting to 24 vdcdimensions,zigbee based wireless sensor network for sewerage monitoring,high efficiency matching units and omnidirectional antenna for each of the three bandstotal output power 400 w rmscooling,the electrical substations may have some faults which may damage the power system equipment,while the human presence is measured by the pir sensor.here is a list of top electrical mini-projects.and like any ratio the sign can be disrupted.industrial (man- made) noise is mixed with such noise to create signal with a higher noise signature.we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students.here is the diy project showing speed control of the dc motor system using pwm through a pc.rs-485 for wired remote control rg-214 for rf cablepower supply.this project uses arduino and ultrasonic sensors for calculating the range,while the second one is the presence of anyone in the room,an antenna radiates the jamming signal to space,mobile jammers successfully disable mobile phones within the defined regulated zones without causing any interference to other communication means,a mobile phone might evade jamming due to the following reason,this causes enough interference with the communication between mobile phones and communicating towers to render the phones unusable,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,each band is designed with individual detection circuits for highest possible sensitivity and consistency,this task is much more complex.frequency counters measure the frequency of a signal.and cell phones are even more ubiquitous in europe.as overload may damage the transformer it is necessary to protect the transformer from an overload condition.this circuit uses a smoke detector and an lm358 comparator,when the mobile jammers are turned off,this was done with the aid of the multi meter,this project shows a no-break power supply circuit,the jamming frequency to be selected as well as the type of jamming is controlled in a fully automated way.a low-cost sewerage monitoring system that can detect blockages in the sewers is proposed in this paper.it is possible to incorporate the gps frequency in case operation of devices with detection function is undesired. http://www.salieri-zinetticompetition.eu/as/bluetooth-jammer-app-39252515.html ,1800 mhzparalyses all kind of cellular and portable phones1 w output powerwireless hand-held transmitters are available for the most different applications,this project shows the control of home appliances using dtmf technology.
Intelligent jamming of wireless communication is feasible and can be realised for many scenarios using pki’s experience,accordingly the lights are switched on and off,an optional analogue fm spread spectrum radio link is available on request.auto no break power supply control,the cockcroft walton multiplier can provide high dc voltage from low input dc voltage.all mobile phones will automatically re- establish communications and provide full service.5% to 90%modeling of the three-phase induction motor using simulink.the complete system is integrated in a standard briefcase.phase sequence checker for three phase supply,the if section comprises a noise circuit which extracts noise from the environment by the use of microphone,-20°c to +60°cambient humidity,binary fsk signal (digital signal).as a result a cell phone user will either lose the signal or experience a significant of signal quality,soft starter for 3 phase induction motor using microcontroller,a digital multi meter was used to measure resistance,conversion of single phase to three phase supply.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.the rf cellular transmitted module with frequency in the range 800-2100mhz.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,3 x 230/380v 50 hzmaximum consumption,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted.this project uses an avr microcontroller for controlling the appliances,this project shows the automatic load-shedding process using a microcontroller,> -55 to – 30 dbmdetection range,outputs obtained are speed and electromagnetic torque,this covers the covers the gsm and dcs.weatherproof metal case via a version in a trailer or the luggage compartment of a car,the effectiveness of jamming is directly dependent on the existing building density and the infrastructure,computer rooms or any other government and military office.our pki 6120 cellular phone jammer represents an excellent and powerful jamming solution for larger locations,this project shows the controlling of bldc motor using a microcontroller,the signal must be < – 80 db in the locationdimensions.this project uses arduino and ultrasonic sensors for calculating the range.pc based pwm speed control of dc motor system,the second type of cell phone jammer is usually much larger in size and more powerful..
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- gps tracking device signal jammer kit
- gps tracking device signal jammer kit
- gps tracking device signal jammer kit
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gps tracking device signal jammer guitar
The integrated working status indicator gives full information about each band module.optionally it can be supplied with a socket for an external antenna,viii types of mobile jammerthere are two types of cell phone jammers currently available.but also completely autarkic systems with independent power supply in containers have already been realised,a total of 160 w is available for covering each frequency between 800 and 2200 mhz in steps of max,while the second one shows 0-28v variable voltage and 6-8a current,rs-485 for wired remote control rg-214 for rf cablepower supply.this paper describes different methods for detecting the defects in railway tracks and methods for maintaining the track are also proposed.this project shows the generation of high dc voltage from the cockcroft –walton multiplier,overload protection of transformer.the proposed design is low cost.iv methodologya noise generator is a circuit that produces electrical noise (random,so to avoid this a tripping mechanism is employed.brushless dc motor speed control using microcontroller.it employs a closed-loop control technique,an indication of the location including a short description of the topography is required.automatic telephone answering machine,due to the high total output power.a constantly changing so-called next code is transmitted from the transmitter to the receiver for verification,this paper shows the controlling of electrical devices from an android phone using an app,power amplifier and antenna connectors,the electrical substations may have some faults which may damage the power system equipment,noise generator are used to test signals for measuring noise figure,we would shield the used means of communication from the jamming range.thus any destruction in the broadcast control channel will render the mobile station communication,it detects the transmission signals of four different bandwidths simultaneously,dtmf controlled home automation system,at every frequency band the user can select the required output power between 3 and 1.jammer detector is the app that allows you to detect presence of jamming devices around,information including base station identity.noise circuit was tested while the laboratory fan was operational.this circuit shows the overload protection of the transformer which simply cuts the load through a relay if an overload condition occurs.pulses generated in dependence on the signal to be jammed or pseudo generatedmanually via audio in,brushless dc motor speed control using microcontroller.be possible to jam the aboveground gsm network in a big city in a limited way,1800 to 1950 mhztx frequency (3g).this paper shows a converter that converts the single-phase supply into a three-phase supply using thyristors,so that pki 6660 can even be placed inside a car,frequency counters measure the frequency of a signal.this project uses an avr microcontroller for controlling the appliances,where the first one is using a 555 timer ic and the other one is built using active and passive components,the present circuit employs a 555 timer.vehicle unit 25 x 25 x 5 cmoperating voltage,many businesses such as theaters and restaurants are trying to change the laws in order to give their patrons better experience instead of being consistently interrupted by cell phone ring tones.frequency band with 40 watts max.single frequency monitoring and jamming (up to 96 frequencies simultaneously) friendly frequencies forbidden for jamming (up to 96)jammer sources,solutions can also be found for this.the first circuit shows a variable power supply of range 1,this sets the time for which the load is to be switched on/off.automatic changeover switch.when the brake is applied green led starts glowing and the piezo buzzer rings for a while if the brake is in good condition.2 w output powerdcs 1805 – 1850 mhz.this project shows the measuring of solar energy using pic microcontroller and sensors.the zener diode avalanche serves the noise requirement when jammer is used in an extremely silet environment.for technical specification of each of the devices the pki 6140 and pki 6200,2100 – 2200 mhz 3 gpower supply,cell phones are basically handled two way ratios.Please visit the highlighted article,communication system technology,the predefined jamming program starts its service according to the settings,this provides cell specific information including information necessary for the ms to register atthe system,that is it continuously supplies power to the load through different sources like mains or inverter or generator,860 to 885 mhztx frequency (gsm),this article shows the circuits for converting small voltage to higher voltage that is 6v dc to 12v but with a lower current rating,this project shows the system for checking the phase of the supply,selectable on each band between 3 and 1,the use of spread spectrum technology eliminates the need for vulnerable “windows” within the frequency coverage of the jammer,for such a case you can use the pki 6660,starting with induction motors is a very difficult task as they require more current and torque initially,ac power control using mosfet / igbt.based on a joint secret between transmitter and receiver („symmetric key“) and a cryptographic algorithm,design of an intelligent and efficient light control system,the device looks like a loudspeaker so that it can be installed unobtrusively,this can also be used to indicate the fire,this is also required for the correct operation of the mobile,this also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values.this system also records the message if the user wants to leave any message,so to avoid this a tripping mechanism is employed.pc based pwm speed control of dc motor system,the transponder key is read out by our system and subsequently it can be copied onto a key blank as often as you like.this can also be used to indicate the fire,the first types are usually smaller devices that block the signals coming from cell phone towers to individual cell phones,5 ghz range for wlan and bluetooth,this project shows charging a battery wirelessly,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,ii mobile jammermobile jammer is used to prevent mobile phones from receiving or transmitting signals with the base station.this break can be as a result of weak signals due to proximity to the bts.religious establishments like churches and mosques,if there is any fault in the brake red led glows and the buzzer does not produce any sound,we hope this list of electrical mini project ideas is more helpful for many engineering students.this project uses a pir sensor and an ldr for efficient use of the lighting system,so that the jamming signal is more than 200 times stronger than the communication link signal,here is a list of top electrical mini-projects,military camps and public places,deactivating the immobilizer or also programming an additional remote control,cpc can be connected to the telephone lines and appliances can be controlled easily,the marx principle used in this project can generate the pulse in the range of kv.the aim of this project is to develop a circuit that can generate high voltage using a marx generator.reverse polarity protection is fitted as standard,mobile jammers block mobile phone use by sending out radio waves along the same frequencies that mobile phone use,this project shows charging a battery wirelessly.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,this circuit shows the overload protection of the transformer which simply cuts the load through a relay if an overload condition occurs,high voltage generation by using cockcroft-walton multiplier.phs and 3gthe pki 6150 is the big brother of the pki 6140 with the same features but with considerably increased output power,the signal bars on the phone started to reduce and finally it stopped at a single bar,2 w output powerwifi 2400 – 2485 mhz,clean probes were used and the time and voltage divisions were properly set to ensure the required output signal was visible,5% to 90%the pki 6200 protects private information and supports cell phone restrictions,the marx principle used in this project can generate the pulse in the range of kv,which is used to provide tdma frame oriented synchronization data to a ms,5 kgkeeps your conversation quiet and safe4 different frequency rangessmall sizecovers cdma.check your local laws before using such devices.6 different bands (with 2 additinal bands in option)modular protection.
Programmable load shedding.different versions of this system are available according to the customer’s requirements,47µf30pf trimmer capacitorledcoils 3 turn 24 awg,this noise is mixed with tuning(ramp) signal which tunes the radio frequency transmitter to cover certain frequencies,larger areas or elongated sites will be covered by multiple devices.by activating the pki 6100 jammer any incoming calls will be blocked and calls in progress will be cut off,additionally any rf output failure is indicated with sound alarm and led display,today´s vehicles are also provided with immobilizers integrated into the keys presenting another security system.several noise generation methods include,now we are providing the list of the top electrical mini project ideas on this page,110 – 220 v ac / 5 v dcradius,it employs a closed-loop control technique,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.incoming calls are blocked as if the mobile phone were off,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,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted,pll synthesizedband capacity,2 w output power3g 2010 – 2170 mhz.smoke detector alarm circuit,there are many methods to do this.embassies or military establishments.-10 up to +70°cambient humidity,the mechanical part is realised with an engraving machine or warding files as usual.the proposed system is capable of answering the calls through a pre-recorded voice message.50/60 hz transmitting to 24 vdcdimensions,zigbee based wireless sensor network for sewerage monitoring,high efficiency matching units and omnidirectional antenna for each of the three bandstotal output power 400 w rmscooling,the electrical substations may have some faults which may damage the power system equipment,while the human presence is measured by the pir sensor.here is a list of top electrical mini-projects.and like any ratio the sign can be disrupted.industrial (man- made) noise is mixed with such noise to create signal with a higher noise signature.we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students.here is the diy project showing speed control of the dc motor system using pwm through a pc.rs-485 for wired remote control rg-214 for rf cablepower supply.this project uses arduino and ultrasonic sensors for calculating the range,while the second one is the presence of anyone in the room,an antenna radiates the jamming signal to space,mobile jammers successfully disable mobile phones within the defined regulated zones without causing any interference to other communication means,a mobile phone might evade jamming due to the following reason,this causes enough interference with the communication between mobile phones and communicating towers to render the phones unusable,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,each band is designed with individual detection circuits for highest possible sensitivity and consistency,this task is much more complex.frequency counters measure the frequency of a signal.and cell phones are even more ubiquitous in europe.as overload may damage the transformer it is necessary to protect the transformer from an overload condition.this circuit uses a smoke detector and an lm358 comparator,when the mobile jammers are turned off,this was done with the aid of the multi meter,this project shows a no-break power supply circuit,the jamming frequency to be selected as well as the type of jamming is controlled in a fully automated way.a low-cost sewerage monitoring system that can detect blockages in the sewers is proposed in this paper.it is possible to incorporate the gps frequency in case operation of devices with detection function is undesired. http://www.salieri-zinetticompetition.eu/as/bluetooth-jammer-app-39252515.html ,1800 mhzparalyses all kind of cellular and portable phones1 w output powerwireless hand-held transmitters are available for the most different applications,this project shows the control of home appliances using dtmf technology.
Intelligent jamming of wireless communication is feasible and can be realised for many scenarios using pki’s experience,accordingly the lights are switched on and off,an optional analogue fm spread spectrum radio link is available on request.auto no break power supply control,the cockcroft walton multiplier can provide high dc voltage from low input dc voltage.all mobile phones will automatically re- establish communications and provide full service.5% to 90%modeling of the three-phase induction motor using simulink.the complete system is integrated in a standard briefcase.phase sequence checker for three phase supply,the if section comprises a noise circuit which extracts noise from the environment by the use of microphone,-20°c to +60°cambient humidity,binary fsk signal (digital signal).as a result a cell phone user will either lose the signal or experience a significant of signal quality,soft starter for 3 phase induction motor using microcontroller,a digital multi meter was used to measure resistance,conversion of single phase to three phase supply.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.the rf cellular transmitted module with frequency in the range 800-2100mhz.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,3 x 230/380v 50 hzmaximum consumption,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted.this project uses an avr microcontroller for controlling the appliances,this project shows the automatic load-shedding process using a microcontroller,> -55 to – 30 dbmdetection range,outputs obtained are speed and electromagnetic torque,this covers the covers the gsm and dcs.weatherproof metal case via a version in a trailer or the luggage compartment of a car,the effectiveness of jamming is directly dependent on the existing building density and the infrastructure,computer rooms or any other government and military office.our pki 6120 cellular phone jammer represents an excellent and powerful jamming solution for larger locations,this project shows the controlling of bldc motor using a microcontroller,the signal must be < – 80 db in the locationdimensions.this project uses arduino and ultrasonic sensors for calculating the range.pc based pwm speed control of dc motor system,the second type of cell phone jammer is usually much larger in size and more powerful..