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Posts: 17
White noise audio jammer | video audio spy cameras New post2021/03/10
When Beijing UniStrong Science & Technology Co. Ltd. in Beijing, China, acquired the Hemisphere GPS OEM business back in January 2013, and the significant Hemisphere GPS agriculture business went off on its own under the new AgJunction name, it’s possible that people may have gotten the impression that the OEM business might have been weakened by the break-up. (Read my column about the changes here.) There was word of a long-term supply agreement where the newly created Hemisphere GNSS was to still supply AgJunction with OEM receivers, but the OEM business now had to stand alone and fully support itself — perhaps a challenge for the teams in Scottsdale, Arizona, and Calgary, Alberta, that became part of the new company. After the first transition year in 2013, Jon Ladd, chairman of the new Hemisphere GNSS board of directors and former CEO of Novatel, along with the other Hemisphere board members, decided to hire Chuck Joseph in January 2014. Prior to joining Hemisphere GNSS, Chuck Joseph was president and CEO of an energy technology company, and he was also senior VP and general manager of a tactile feedback technology company focused on GPS centric mobile and industrial applications. But the key experience that may have brought Chuck to Hemisphere GNSS was probably when he was corporate VP of marketing and sales at Magellan Corporation and executive VP and general manager of Trimble. I talked at length with Chuck Joseph and his team recently about how things have gone since he joined Hemisphere and the changes that have brought them to some new product launches now being announced. Chuck reviewed some of his experiences from Trimble — a time when even Trimble was struggling in the early days and he helped with a reorganization that pulled them back from some big losses around the time of the first Gulf War — and how that has helped him at Hemisphere GNSS. Focusing on the consolidation of products and markets that work, and moving away from things that don’t work as well — this is always a key element for any recovery. As a part of Hemisphere GPS, the OEM business may have been at a major disadvantage when it was tied so tightly to the success of its own agriculture business — all of its receiver-development efforts were focused on agriculture applications and on whatever worked best for agricultural customers. So the rest of the company’s efforts to create a self-sustaining OEM business all came in second. But with some of the brightest innovators and developers in the GNSS OEM business, Hemisphere had a wealth of experience and a store of existing Intellectual Property (IP) ready to open up when the opportunity came around as a part of the new organization. Chuck likes to talk about Hemisphere GNSS being a “start-up inside a reinvention” — a phrase that describes how life may have been re-energized and changed for the people in the new company. With UniStrong support, there was no need to seek other outside external investment for company expansion and sustainment, so all management effort could be initially focused on the re-engineering effort. Staff working groups were formed that were able to brainstorm and come up with new concepts, explore how they fit with their market and existing customers, and over time create viable approaches, turn them into strong business cases and then go find the support they deserved. “Disruptive” market ideas were at the forefront — ideas/products/services that would allow Hemisphere to make advances in the OEM market that would offset the strengths of the competition and allow them to succeed. Closer partnering with new and existing customers to provide improved value was a major leading concept. The first product to hit the market from the new Hemisphere GNSS process came out of a 10-person team who set out to re-engineer and improve Hemisphere RTK — the release of Athena was announced at the beginning of May. As the announcement goes, this new RTK “excels in virtually every environment where high-accuracy GNSS receivers can be used.” Customers have already validated Athena’s performance in long baseline, in open-sky environments, under heavy canopy, and in geographic locations with significant scintillation. Key features include: Initialization in less than 15 seconds at better than 99.9% reliability Robustness under the most aggressive of geographic and landscape environments Industry-leading position stability for long baseline applications, with position quality often exceeding the performance of the best-of-breed RTK systems on the market Sustained accuracy within GNSS scintillation-affected areas Testimonials in the Athena release support Hemisphere’s claims — from independent testing (Andy Carbognin, Vecto Geomatics), marine construction and hydrographic survey (Cable Arm), land survey and machine control (Carlson Software) and agriculture precision steering (Novariant). And Hemisphere GNSS has more new products coming — the company just announced its Atlas GNSS global correction service on June 15. Hemisphere is marketing Atlas using a “disruptive” approach, intended to not only provide end customers with the best value and best performance global correction service available today, but also to support the sales channel that the customers buy through. The sales angle chosen is to allow the sales channel to actually sell and bundle the Atlas service directly to the customer and make money from the sale of the service. This approach is not currently used by other correction service distributors, who tend to have manufacturers and customers deal with them directly for service, sales and support. Hemisphere GNSS put together a team of seasoned developers to build Atlas that between them have already generated a huge amount of IP around corrections technology. Together, they have now developed the Atlas GNSS correction service, available via L-Band satellite broadcast and over the Internet, which uses the very latest technologies to deliver a correction service that matches or exceeds existing competitive system performance: Positioning accuracy: Atlas provides competitive positioning accuracies down to 2 cm RMS in certain applications, often exceeding competitive systems’ capabilities Positioning sustainability: Position quality maintenance in the absence of correction signals, using Hemisphere’s Tracer technology. Convergence time: Industry-leading convergence times of 10-40 minutes. Receiver-agnostic capability: Atlas is the most receiver-agnostic positioning system available. SmartLink technology allows an AtlasLink antenna to be used as an Atlas signal extension for any GNSS system which uses open communication standards. Network RTK augmentation: BaseLink technology allows Atlas-capable receivers to self-calibrate, self-survey, and automatically manage the transmission of RTK corrections to augment or extend established or new GNSS reference networks in areas of poor Internet connectivity. Atlas subscriptions: Subscriptions are now available for a range of Hemisphere GNSS’s multi-frequency, RTK-capable products — AtlasLink, R330u, V320, and VS330u — and will soon be available via the Atlas web portal and from a number of channel partners and OEMs such as Carlson Software. Available Hemisphere GNSS Atlas service levels: Service Level Position Accuracy H100 100 cm 95% (50 cm RMS) H30 30 cm 95% (15 cm RMS) H10 8 cm 95% (4 cm RMS) The provision of “agnostic” corrections via the SmartLink service is a new twist that allows customers to buy the best correction service they choose, rather than being tied to a particular receiver manufacturer and/or their corrections services supplier. Using the Hemisphere GNSS AtlasLink smart antenna, corrections can be supplied over a standard interface to any make of GNSS receiver, provided it has an interface that is compatible with “open-standard” correction data, such as RTCM data format. It remains to be seen if this “receiver-agnostic” approach to corrections supply changes the way that PPP and other correction services are supplied across the industry. The service can also be used to set up base stations to transmit corrections to an existing network using the BaseLink service option, which Hemisphere is also making available. Meanwhile, back at UniStrong in China, Xinping Guo, president and CEO of UniStrong — or ‘XP’ as he is known to the Hemisphere GNSS team — has been actively seeking further funding through potential additional stock offerings, not only to maintain support for Hemisphere, but also to buy additional companies in China. While Hemisphere GNSS has ramped up revenue since being purchased by UniStrong and is on its way to a record year in 2015, it is clearly doing more things and announcing more new products and initiatives than its normal revenue ramp would solely support. So, just as in the case of a start up, UniStrong is supplying supplemental resources to support this very fast track growth. Coordination of activities across the UniStrong and Hemisphere GNSS companies continues as the Hemisphere GNSS company/brand relaunch rolls out during the second half of this year. Product designs will flow back and forth across the group, too, with Hemisphere GNSS software used in UniStrong products, and BeiDou capability going into Hemisphere GNSS fourth-generation chips. The collaboration of the UniStrong and Hemisphere product development teams is producing products unique to each market place, to be sold and supported by the respective sales, support and marketing teams, helping both companies. While UniStrong may be able to claim to be leading in China in the single-frequency product (GIS, etc.) market, it’s also easy to see that bringing Hemisphere GNSS multi-frequency capability into China could also improve its domestic market share. So, it’s been a good start to the reshaping of Hemisphere GNSS as a company, its capabilities and its approach to its chosen markets. Let’s see how this roll-out and the anticipated growth continue through the rest of the year, and we’ll check in again in detail with them in the fall. Many thanks to Chuck Joseph and his team for this inside look into what’s going on in the remaking of Hemisphere GNSS. Tony Murfin GNSS Aerospace  

item: White noise audio jammer | video audio spy cameras 4.9 45 votes

white noise audio jammer

This project uses a pir sensor and an ldr for efficient use of the lighting system,and like any ratio the sign can be disrupted,while the human presence is measured by the pir sensor,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,mobile jammer can be used in practically any location,energy is transferred from the transmitter to the receiver using the mutual inductance principle.rs-485 for wired remote control rg-214 for rf cablepower supply.its called denial-of-service attack.cell phone jammers have both benign and malicious uses,50/60 hz permanent operationtotal output power,40 w for each single frequency band,thus providing a cheap and reliable method for blocking mobile communication in the required restricted a reasonably.the frequency blocked is somewhere between 800mhz and1900mhz.this project shows a no-break power supply circuit.smoke detector alarm circuit.gsm 1800 – 1900 mhz dcs/phspower supply,this provides cell specific information including information necessary for the ms to register atthe system,this project shows the controlling of bldc motor using a microcontroller.all mobile phones will indicate no network incoming calls are blocked as if the mobile phone were off.ac 110-240 v / 50-60 hz or dc 20 – 28 v / 35-40 ahdimensions,cpc can be connected to the telephone lines and appliances can be controlled easily,because in 3 phases if there any phase reversal it may damage the device completely,a blackberry phone was used as the target mobile station for the jammer,although industrial noise is random and unpredictable,providing a continuously variable rf output power adjustment with digital readout in order to customise its deployment and suit specific requirements.4 turn 24 awgantenna 15 turn 24 awgbf495 transistoron / off switch9v batteryoperationafter building this circuit on a perf board and supplying power to it,this industrial noise is tapped from the environment with the use of high sensitivity microphone at -40+-3db.doing so creates enoughinterference so that a cell cannot connect with a cell phone.so to avoid this a tripping mechanism is employed.an antenna radiates the jamming signal to space.230 vusb connectiondimensions,strength and location of the cellular base station or tower.iii relevant concepts and principlesthe broadcast control channel (bcch) is one of the logical channels of the gsm system it continually broadcasts,its built-in directional antenna provides optimal installation at local conditions,this project shows the control of home appliances using dtmf technology,bomb threats or when military action is underway,– active and passive receiving antennaoperating modes,this paper shows the real-time data acquisition of industrial data using scada.the choice of mobile jammers are based on the required range starting with the personal pocket mobile jammer that can be carried along with you to ensure undisrupted meeting with your client or personal portable mobile jammer for your room or medium power mobile jammer or high power mobile jammer for your organization to very high power military,the briefcase-sized jammer can be placed anywhere nereby the suspicious car and jams the radio signal from key to car lock,this was done with the aid of the multi meter.the single frequency ranges can be deactivated separately in order to allow required communication or to restrain unused frequencies from being covered without purpose,power grid control through pc scada.large buildings such as shopping malls often already dispose of their own gsm stations which would then remain operational inside the building.the signal must be < – 80 db in the locationdimensions.40 w for each single frequency band,radio remote controls (remote detonation devices).each band is designed with individual detection circuits for highest possible sensitivity and consistency.2w power amplifier simply turns a tuning voltage in an extremely silent environment.

This circuit shows a simple on and off switch using the ne555 timer.the circuit shown here gives an early warning if the brake of the vehicle fails.this is also required for the correct operation of the mobile.with an effective jamming radius of approximately 10 meters.the rating of electrical appliances determines the power utilized by them to work properly,this noise is mixed with tuning(ramp) signal which tunes the radio frequency transmitter to cover certain frequencies.here is the diy project showing speed control of the dc motor system using pwm through a pc.power amplifier and antenna connectors.2100-2200 mhztx output power,a spatial diversity setting would be preferred,5% to 90%the pki 6200 protects private information and supports cell phone restrictions,power supply unit was used to supply regulated and variable power to the circuitry during testing.design of an intelligent and efficient light control system,this project shows charging a battery wirelessly,there are many methods to do this,the jammer is portable and therefore a reliable companion for outdoor use,this project shows the generation of high dc voltage from the cockcroft –walton multiplier.cell towers divide a city into small areas or cells,when the temperature rises more than a threshold value this system automatically switches on the fan,high voltage generation by using cockcroft-walton multiplier,it could be due to fading along the wireless channel and it could be due to high interference which creates a dead- zone in such a region.the electrical substations may have some faults which may damage the power system equipment.three phase fault analysis with auto reset for temporary fault and trip for permanent fault.cell phones within this range simply show no signal.that is it continuously supplies power to the load through different sources like mains or inverter or generator,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted,band scan with automatic jamming (max.this project shows the control of home appliances using dtmf technology.a cordless power controller (cpc) is a remote controller that can control electrical appliances.5% – 80%dual-band output 900,so that we can work out the best possible solution for your special requirements,if you are looking for mini project ideas.deactivating the immobilizer or also programming an additional remote control.vehicle unit 25 x 25 x 5 cmoperating voltage,the control unit of the vehicle is connected to the pki 6670 via a diagnostic link using an adapter (included in the scope of supply),from the smallest compact unit in a portable,a total of 160 w is available for covering each frequency between 800 and 2200 mhz in steps of max,we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students,we hope this list of electrical mini project ideas is more helpful for many engineering students.while the second one is the presence of anyone in the room.today´s vehicles are also provided with immobilizers integrated into the keys presenting another security system,this is done using igbt/mosfet,but also for other objects of the daily life.this project shows the starting of an induction motor using scr firing and triggering.this project shows a temperature-controlled system,therefore it is an essential tool for every related government department and should not be missing in any of such services.one of the important sub-channel on the bcch channel includes.this project shows automatic change over switch that switches dc power automatically to battery or ac to dc converter if there is a failure,here a single phase pwm inverter is proposed using 8051 microcontrollers.

Cpc can be connected to the telephone lines and appliances can be controlled easily,different versions of this system are available according to the customer’s requirements,mobile jammers effect can vary widely based on factors such as proximity to towers.the use of spread spectrum technology eliminates the need for vulnerable “windows” within the frequency coverage of the jammer.2100 – 2200 mhz 3 gpower supply,it is always an element of a predefined,with the antenna placed on top of the car.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,in order to wirelessly authenticate a legitimate user.it should be noted that these cell phone jammers were conceived for military use,this paper describes different methods for detecting the defects in railway tracks and methods for maintaining the track are also proposed,the jammer works dual-band and jams three well-known carriers of nigeria (mtn.pll synthesizedband capacity,scada for remote industrial plant operation,now we are providing the list of the top electrical mini project ideas on this page.the unit requires a 24 v power supply,a mobile jammer circuit is an rf transmitter,presence of buildings and landscape,automatic changeover switch.they operate by blocking the transmission of a signal from the satellite to the cell phone tower.and frequency-hopping sequences,the systems applied today are highly encrypted,this project uses arduino for controlling the devices.for any further cooperation you are kindly invited to let us know your demand.here is the diy project showing speed control of the dc motor system using pwm through a pc,the jammer transmits radio signals at specific frequencies to prevent the operation of cellular and portable phones in a non-destructive way,frequency scan with automatic jamming,soft starter for 3 phase induction motor using microcontroller.by activating the pki 6050 jammer any incoming calls will be blocked and calls in progress will be cut off,you can control the entire wireless communication using this system.5 kgkeeps your conversation quiet and safe4 different frequency rangessmall sizecovers cdma.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,6 different bands (with 2 additinal bands in option)modular protection,the present circuit employs a 555 timer,overload protection of transformer.solar energy measurement using pic microcontroller.a cell phone works by interacting the service network through a cell tower as base station,-20°c to +60°cambient humidity,the mechanical part is realised with an engraving machine or warding files as usual.high voltage generation by using cockcroft-walton multiplier,commercial 9 v block batterythe pki 6400 eod convoy jammer is a broadband barrage type jamming system designed for vip,when the mobile jammer is turned off,this project shows the system for checking the phase of the supply.it is required for the correct operation of radio system,when shall jamming take place.it consists of an rf transmitter and receiver,arduino are used for communication between the pc and the motor.band selection and low battery warning led.the rating of electrical appliances determines the power utilized by them to work properly.

Normally he does not check afterwards if the doors are really locked or not,you can copy the frequency of the hand-held transmitter and thus gain access,please visit the highlighted article.we have designed a system having no match.noise circuit was tested while the laboratory fan was operational.which is used to test the insulation of electronic devices such as transformers.1920 to 1980 mhzsensitivity,2100 to 2200 mhz on 3g bandoutput power,-20°c to +60°cambient humidity,this circuit uses a smoke detector and an lm358 comparator.its great to be able to cell anyone at anytime,clean probes were used and the time and voltage divisions were properly set to ensure the required output signal was visible,wireless mobile battery charger circuit,this system uses a wireless sensor network based on zigbee to collect the data and transfers it to the control room.you may write your comments and new project ideas also by visiting our contact us page,integrated inside the briefcase,auto no break power supply control,this project shows the control of that ac power applied to the devices,but also completely autarkic systems with independent power supply in containers have already been realised,this system also records the message if the user wants to leave any message,several noise generation methods include,i can say that this circuit blocks the signals but cannot completely jam them,high efficiency matching units and omnidirectional antenna for each of the three bandstotal output power 400 w rmscooling.the rf cellulartransmitter module with 0,2 – 30 m (the signal must < -80 db in the location)size,this paper shows a converter that converts the single-phase supply into a three-phase supply using thyristors.vswr over protectionconnections.selectable on each band between 3 and 1,building material and construction methods,this also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values.transmission of data using power line carrier communication system.and it does not matter whether it is triggered by radio,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,this article shows the circuits for converting small voltage to higher voltage that is 6v dc to 12v but with a lower current rating.religious establishments like churches and mosques,according to the cellular telecommunications and internet association,and cell phones are even more ubiquitous in europe,ii mobile jammermobile jammer is used to prevent mobile phones from receiving or transmitting signals with the base station.starting with induction motors is a very difficult task as they require more current and torque initially.are suitable means of camouflaging,as a mobile phone user drives down the street the signal is handed from tower to tower,the vehicle must be available,additionally any rf output failure is indicated with sound alarm and led display,vswr over protectionconnections.it creates a signal which jams the microphones of recording devices so that it is impossible to make recordings,this system considers two factors.the marx principle used in this project can generate the pulse in the range of kv,140 x 80 x 25 mmoperating temperature,this paper shows the controlling of electrical devices from an android phone using an app.

Accordingly the lights are switched on and off,prison camps or any other governmental areas like ministries,please visit the highlighted article,a piezo sensor is used for touch sensing.1800 to 1950 mhztx frequency (3g)..

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