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Integrations of MEMS sensors with signal conditioning and radio communications form “motes” with extremely low-cost and low-power requirements and miniaturized form factor. Now standard features in modern mobile devices, MEMS accelerometers and gyros can be combined with absolute positioning technologies, such as GNSS or other wireless technologies, for user localization. Navigation has been revolutionized by micro-electro-mechanical systems (MEMS) sensor development, offering new capabilities for wireless positioning technologies and their integration into modern smartphones. These new technologies range from simple IrDA using infrared light for short-range, point-to-point communications, to wireless personal area network (WPAN) for short range, point-to multi-point communications, such as Bluetooth and ZigBee, to mid-range, multi-hop wireless local area network (WLAN, also known as wireless fidelity or Wi-Fi), to long-distance cellular phone systems, such as GSM/GPRS and CDMA. With these technologies, navigation itself has become much broader than just providing a solution to location-based services (LBS) questions, such as “Where am I?” or “How to get from start point to destination?” It has moved into new areas such as games, geolocation, mobile mapping, virtual reality, tracking, health monitoring and context awareness. MEMS sensors are now essential components of modern smartphones and tablets. Miniaturized devices and structures produced with micro-fabrication techniques, their physical dimensions range from less than 1 micrometer (μm, a millionth of a meter) to several millimeters (mm). The types of MEMS devices vary from relatively simple structures having no moving elements to complex electromechanical systems with multiple moving elements under the control of integrated microelectronics. Apart from size reduction, MEMS technology offers other benefits such as batch production and cost reduction, power (voltage) reduction, ruggedization and design flexibility, within limits. Wireless sensor technology allows MEMS sensors to be integrated with signal-conditioning and radio units to form “motes” with extremely low cost, small size and low power requirements. New miniaturized sensors and actuators based on MEMS are available on the market or in the development stage. Today’s smartphone sensors can include MEMS-based accelerometers, microphones, gyroscopes, temperature and humidity sensors, light sensors, proximity and touch sensors, image sensors, magnetometers, barometric pressure sensors and capacitive fingerprint sensors, all integrated to wireless sensor nodes. These sensors were not initially intended for navigation. For instance, accelerometers are used primarily for applications such as switching the display from landscape to portrait as well as gaming. These embedded sensors, however, are natural candidates for sensing user context. Because of their locating capabilities, people are getting used to the location-enabled life. MEMS accelerometers and gyros, for instance, can be employed for localization in combination with absolute positioning technologies, such as GNSS or other wireless technologies. WIRELESS OPTIONS IN SMARTPHONES Various wireless standards have been established. Among them, the standards for Wi-Fi, IEEE 802.11b and wireless PAN, IEEE 802.15.1 (Bluetooth) and IEEE 802.15.4 (ZigBee) are used more widely for measurement and automation applications. All these standards use the instrumentation, scientific and medical (ISM) radio bands, including the sub-GHz bands of 902–928 MHz (US), 868–870 MHz (Europe), 433.05–434.79 MHz (US and Europe) and 314–316 MHz (Japan) and the GHz bands of 2.4000-2.4835 GHz (worldwide acceptable). In general, a lower frequency allows a longer transmission range and a stronger capability to penetrate through walls and glass. However, due to the fact that radio waves with lower frequencies are more easily absorbed by materials, such as water and trees, and that radio waves with higher frequencies are easier to scatter, effective transmission distance for signals carried by a high-frequency radio wave may not necessarily be shorter than that of a lower frequency carrier at the same power rating. The 2.4-GHz band has a wider bandwidth that allows more channels and frequency hopping and permits compact antennas. Wireless Fidelity. Wi-Fi (IEEE 802.11) is a flexible data communication protocol implemented to extend or substitute for a wired local area network, such as Ethernet. The bandwidth of 802.11b is 11 Mbits and it operates at 2.4 GHz frequency. Originally a technology for short-range wireless data communication, it is typically deployed as an ad-hoc network in a hot-spot. Wireless networks are built by attaching an access point (AP) to the edge of a wired network. Clients communicate with the AP using a wireless network adapter similar to an Ethernet adapter. Beacon frames are transmitted in IEEE 802.11 Wi-Fi for network identification, broadcasting network capabilities, synchronization and other control and management purposes. Timers of all terminals are synchronized to the AP clock by the timestamp information of the beacon frames. The IEEE 802.11 MAC (Media Access Control) protocol utilizes carrier sensing contention based on energy detection or signal quality. RSSs and MAC addresses of the APs are location-dependent information that can be adopted for positioning. For localization of a mobile device, either cell-based solutions or (tri)lateration and location fingerprinting are commonly employed. Bluetooth. A wireless protocol for short-range communication, Bluetooth (IEEE 802.15.1) uses the 2.4-Hz, 915-MHz and 868-MHz ISM radio bands to communicate at 1 Mbit between up to eight devices. It is mainly designed to maximize the ad-hoc networking functionality (Wang et al., 2006). Compared to Wi-Fi, the gross bit rate is lower (1 Mbps), and the range is shorter (typically around 10 m). On the other hand, Bluetooth is a “lighter” standard, highly ubiquitous (embedded in most phones) and supports several other networking services in addition to IP. For positioning either tags (small size transceivers) or Bluetooth low energy (BLE) iBeacons are common. Each tag has a unique ID that can be used for localization. iBeacon is a low-energy protocol developed by Apple; compatible hardware transmitters, typically so-called beacons, broadcast their identifier to nearby portable electronic devices. The technology enables smartphones, tablets and other devices to perform actions when in close proximity to an iBeacon whereby a universally unique identifier picked up by a compatible app or operating system is transmitted. The identifier and several bytes sent with it can be used to determine the device’s physical location, track customers, or trigger an LBS action on the device such as a check-in on social media or a push notification. One application is distributing messages at a specific point of interest — for example, a store, a bus stop, a room or a more specific location like a piece of furniture or a vending machine. This is similar to previously used geopush technology based on GNSS, but with a much reduced impact on battery life and much extended precision. Another application is an indoor positioning system, which helps smartphones determine their approximate location or context. With the help of an iBeacon, a smartphone’s software can approximately find its relative location to an iBeacon. iBeacon differs from some other LBS technologies as the broadcasting device (beacon) is only a one-way transmitter to the receiving smartphone, and necessitates a specific app installed on the device to interact with the beacons. This ensures that only the installed app (not the iBeacon transmitter) can track users, potentially against their will, as they passively walk around the transmitters. Localization is based on proximity sensing and cell-based solutions. ZigBee. ZigBee is an IEEE 802.15.4-based specification for a suite of high-level communication protocols used to create personal area networks with small, low-power digital radios. ZigBee operates in the ISM radio bands: 2.4 GHz in most jurisdictions worldwide, 784 MHz in China, 868 MHz in Europe and 915 MHz in the U.S. and Australia. Data rates vary from 20 kbit/s (868-MHz band) to 250 kbit/s (2.4-GHz band). It adds network, security and application software and is intended to be simpler and less expensive than other WPANs such as Bluetooth or Wi-Fi. Owing to its low power consumption and simple networking configuration, ZigBee is best suited for intermittent data transmissions from a sensor or input device. Applications include wireless light switches, electrical meters with in-home displays, traffic management systems and other consumer and industrial equipment that requires short-range low-rate wireless data transfer. Distances are limited to 10–100 m line-of-sight, depending on power output and environmental characteristics. ZigBee localization techniques usually use measurement of signal strength (RSS-based positioning) in conjunction with (tri)lateration and fingerprinting. COMPARING STANDARDS Table 1 compares the three wireless standards most suitable for a wireless sensor network. The standards also address the network issues for wireless sensors. Three types of networks (star, hybrid and mesh) have been developed and standardized. TABLE 1. Comparison of Wi-Fi, Bluetooth and ZigBee. Bluetooth uses star networks, composed of piconets and scatternets. Each piconet connects one master node with up to seven slave nodes, whereas each scatternet connects multiple piconets, to form an ad-hoc network. ZigBee uses hybrid star networks of multiple master nodes with routing capabilities to connect slave nodes, which have no routing capability. The most efficient networking technology uses peer-to-peer mesh networks, which allow all the nodes in the network to have routing capability. Mesh networks allow autonomous nodes to self-assemble into the network and allow sensor information to propagate across the network with high reliability and over an extended range. They also allow time synchronization and low power consumption for the “listeners” in the network, thus extending battery life. When a large number of wireless sensors need to be networked, several levels of networking may be combined. For example, an IEEE 802.11 (Wi-Fi) mesh network comprised of high-end nodes, such as gateway units, can be overlaid on a ZigBee sensor network to maintain a high level of network performance. A remote application server (RAS) can also be deployed in the field close to a localized sensor network to manage the network, to collect localized data, to host web-based applications, to remotely access the cellular network via a GSM/GPRS or a CDMA-based modem and, in turn, to access the internet and remote users. ESTIMATION METHODS The three most common position estimation methods are cell-based positioning (cell-of-origin, CoO), (tri) lateration and location fingerprinting, regarding achievable positioning accuracies as well as their advantages and disadvantages. They provide different level of accuracies ranging from dm up to tens of m. Compared to (tri)lateration and fingerprinting, the principle of operation of CoO is the most straightforward and simplest. Disadvantages range from the requirement of a large number of devices or receivers as well as their performance in dynamic environments. All these techniques provide absolute localization capabilities. Their disadvantage is that position fixes are lost if no coverage or signal availability is available. Thus, combination with other technologies to bridge loss of lock of wireless signals (for example, no GNSS reception) is required. In smartphones, motion sensors exists that can be employed for inertial navigation (IN). In this article, these sensors are also referred to as inertial sensors. In the simplest case, a position solution can be obtained from the relative measurements of the inertial sensors via dead reckoning (DR). The accelerometers, for instance, can be used by a pedestrian to count steps while walking and the gyroscope and magnetometer can provide the direction of movement. These sensors have therefore substantially won on importance for navigation solutions. MEMS LOCATION SENSORS For many navigation applications, improved accuracy and performance is not necessarily the most important issue, but meeting performance at reduced cost and size is. In particular, small navigation sensor size allows the introduction of guidance, navigation and control into applications previously considered out of reach. In this context, the small size, extreme ruggedness and potential for very low-cost and weight means of MEMS gyros and accelerometers have been, and will be, able to utilize inertial guidance systems — a situation that was unthinkable before MEMS. The reduction in size of the sensing elements, however, creates challenges for attaining good performance. In general, the performance of MEMS inertial measurement units (IMUs) continues to be limited by gyro performance, which is typically around 10 to 30 deg/h, rather than by accelerometer performance, which has demonstrated tens of micro-g or better. MEMS has struggled to reach high-accuracy tactical-grade quality. MEMS Accelerometors. MEMS accelerometers are either pendulous/displacement mass type or resonator type. The former use closed-loop capacitive sensing and electrostatic forcing while the latter are based on resonance operation. Both can detect acceleration in two primary ways: either displacement of a hinged or flexure-supported proof mass under acceleration, producing a change in a capacitive or piezoelectric readout, or frequency change of a vibrating element caused by a change in its tension induced by a change of loading from a seismic-proof mass. Pendulous types can meet a wide performance range from 1 mg for tactical systems down to 25 μg. Resonant accelerometers or VBAs can reach higher performance down to 1 μg. MEMS-Based Gyroscopes. For MEMS INS, attaining suitable gyro performance is more difficult to achieve than accelerometer performance. Fundamentally, MEMS gyros fall into four major areas: vibrating beams, vibrating plates, ring resonators and dithered accelerometers. Gyroscopes are usually built as hybrid solutions, with sensor and electronics as two separate chips. The operational principle for all vibratory gyroscopes is based on the utilization of the Coriolis force. If a mass is vibrated sinusoidally in a plane, and that plane is rotated at some angular rate Ω, then the Coriolis force causes the mass to vibrate sinusoidally perpendicular to the frame with amplitude proportional to the angular rate Ω. Measurement of the Coriolis-induced motion provides knowledge of the angular rate Ω. This rate measurement is the underlying principle of all quartz and silicon micro-machined. These gyroscopes are usually designed as an electronically driven resonator, which are often fabricated out of a single piece of quartz or silicon. The output is demodulated, amplified and digitized. Their extremely small size, combined with the strength of silicon, makes them ideal for very high-acceleration applications. For purely surface micro-mechanical gyroscopes, given their small sizes and capacitances, monolithic integration is an option to be considered not so much for cost as for performance. Combined IMUs. Further interest in all-accelerometer systems, which are also referred to as gyro-free, arises because high-performing small gyroscopes are very difficult to produce. Two approaches are typically used. In the first, the Coriolis effect is utilized. Typically, three opposing pairs of monolithic MEMS accelerometers are dithered on a vibrating structure (or rotated). This approach allows the detection of the angular rate Ω. In the second, the accelerometers are placed in fixed locations and used to measure angular acceleration. In both approaches, the accelerometers also measure linear acceleration, enabling a full navigation solution. In the direct approach, however, the need to make one more integration step makes it more vulnerable to bias variations and noise, so the output errors grow by an order of magnitude faster over time than when using a conventional IMU. However, these devices only provide tactical-grade performance, and are most useful in GNSS-aided applications. The concept of a navigation-grade all-accelerometer IMU requires accelerometers with accuracies on the order of nano-g’s or better, and with large separation distances. Use of all-accelerometer navigation for GNSS-unavailable environments will likely require augmentation with other absolute positioning techniques. Further sensor size reductions are underway through the combination of two in-plane (x- and y-axis) and one out-of- plane (z-axis) sensors on one chip. These multi-axes gyroscopes and accelerometer chips produce IMUs as small as 0.2 cm3. Barometric Sensors. Barometric pressure sensors embedded in smartphones and other mobile devices demand small size, low cost and high-accuracy performance. The key element of a pressure sensor is a diaphragm containing piezoresistors which can be formed by ion implantation or in-diffusion. Applied pressure deflects the diaphragm and thereby changes the resistance of the piezoresistors. By arranging the piezoresistors in a Wheatstone bridge, an output signal voltage can be generated. The measurement sensitivity of the pressure sensor is determined by the strain at the bottom plane of the diaphragm, whereby larger strain leads to higher sensitivity. These altimeters are increasingly used in smartphones and other navigation systems. They can enable altitude determination of the user, for example, to determine the correct floor in a multi-storey building. Pedestrian Dead Reckoning (PDR). The MEMS accelerometers embedded in the mobile device can be used to estimate the distance traveled from the accelerations made while walking, and magnetometers and gyroscopes to obtain user heading. Starting from a known position, determined by GNSS or other absolute positioning technique, the current position of the user can then be dead-reckoned using observations of the inertial sensors. DR techniques differ from other localization techniques because the position is always calculated relative to the previously calculated position and no correlation with the real position can be made. PDR can give the best available information on position; however, it is subject to significant cumulative errors, i.e., either compounding, multiplicatively or exponentially, due to many factors as both velocity and direction must be accurately known at all instants for position to be determined accurately. The accuracy of PDR can be increased significantly by using other, more reliable methods  — GNSS or another absolute positioning technique such as Wi-Fi — the combination with inertial sensors produces more reliable and accurate navigation. Altitude Determination. For navigation, determination of the altitude of the user can be of great importance, for example in determining the correct floor in a multi-storey building. Barometric pressure sensors can provide this data, augmenting the inertial sensors that can usually only provide reliable 2D localization. Furthermore, if only three GNSS satellites are visible, providing a 2D positioning solution, pressure sensors can aid 3D localization. Altitude determination with a barometric pressure sensor can be performed relatively from a given start height — for example, obtained from GNSS outside the building or from a known height point in the indoor environment. As the user walks inside the building and up stairs or elevator to other floors, differences in air pressure can be calculated using a simple relationship between the pressure changes and height differences. For conversion of the air pressure in a height difference, the mean value of the temperature at both stations is also required; MEMS infrared temperature sensors are increasingly found in smartphones to provide this. Activity Detection. Low-cost inertial and motion sensors provide a new platform for dynamic activity pattern inference. Human activity recognition aims to recognize the motion of a person from a series of observations of the user’s body and environment. A single biaxial accelerometer can classify six activities: walking, running, sitting, walking upstairs, walking downstairs and standing. Until recently, sensors on the body have been used for activity detection, and until recently only a few studies have used a smartphone to collect data for activity recognition. Smartphone accelerometers recognize acceleration in three axes as shown in Figure 1. Different motion sequences can thereby be ascertained. Figure 1. Smartphone coordinate frame (left) and global horizontal coordinate system (right). If a smartphone is held horizontally in the hand during a forward motion, then an acceleration in the y-axis is induced. When working with accelerations, two approaches can be applied to measure the linear displacement: integration of the accelerations or step detection combined with step size estimate. In the first case, the distance traveled can be theoretically calculated by integrating the accelerations once for velocity, twice for distance. Due to the double integration, however, any error in the signal will propagate rapidly, so the drift on the received signals from the accelerometer makes it impossible to use integration for walks of more than a few seconds. The Zero Velocity Update (ZUPT) technique, where the velocity is reset to zero between every consecutive step when the foot is stationary for a small amount of time, can overcome this. Any error produced during one step has no influence on following steps. ZUPT can only be used when the accelerometer is placed on the foot, taking advantage of the stationary period between footsteps. In the latter case, the distance traveled is obtained from step counts by processing the fluctuating vertical accelerations, which cross zero twice with every step. When the number of steps and the step size are acquired, the distance can be calculated by multiplication. Figure 2 shows the recorded acceleration of a walking person in the z-axis, with significant maxima and minima that enable step-counting. Correction for the gravity effect on the x-, y- and z-axes of the smartphone’s local coordinate system is key to the correct determination of accelerometer-derived distance traveled. The MEMS-based three-axis accelerometer allows the device to detect the force applied along the three axes in order to accomplish specific functions based on predefined configurations. Figure 2 . Typical recording of accelerometer sensor data in z-axis of a walking user. The mobile device can be oriented in such that one of the axes is aligned in the direction of movement or heading (for example, y-axis), the positive x-axis is pointing rightward and the positive z-axis is upward (compare Figure 1). When the y-axis is horizontal, the gravity effect will be fully reflected on the z-axis. However, a cell phone will most likely be placed by a user into a pocket or bag. Therefore, most existing step detection algorithms cannot be used directly — adjustments have to be made to take into account the orientation of the accelerometers. Because a phone can be placed with any side up or down, the accelerations are observed to determine which axis is the most vertical one. The accelerations of the axis that is pointing directly to the center of the Earth has a value of 1 g due to gravity. So if the smartphone is lying flat on a table, with the display side up, then the z-axis of the accelerometer would theoretically have a value of 1,000 mg. If the phone is put crooked (not along one of the axes) in someone’s pocket, the values will be lower than 1,000 mg. So to detect which accelerometer has the most vertical axis, the absolute average of the last 30 samples, or 1.2 seconds, of all three axes of the accelerometers of which the absolute value is closest to 1 g, is the most vertical axis and the accelerometer to use. SYSTEM COMPARISON Table 2 compares the most commonly used location sensors and systems in mobile devices classified depending on their positioning capability — absolute or relative — and on their type. A meaningful combination in form of a hybrid solution will produce the best performance for localization of a mobile smartphone user. TABLE 2. Specifications of the most commonly used location sensors and systems in mobile devices. Combining MEMS, Wireless. For the majority of indoor navigation systems, the combination of MEMS sensors and wireless options provides the optimal solution. MEMS sensors can provide relative positioning information, with an unbounded accumulation of location errors over time. Wireless systems provide an absolute position in either a local or global coordinate frame, independent of previous estimates without integrating measurements over time. The combination of these two technologies takes advantages of the strengths of both, producing a more robust position solution. CONCLUSIONS The increasing ubiquity of location-aware devices has pushed the need for robust GNSS-like positioning capabilities in difficult environments. No single sensor or technique can meet the positioning requirements for the increasing number of safety- and liability-critical mass-market applications. Integration is one approach to improving performance level, but a significant step change in high-performance positioning in GNSS-difficult environments, higher performance level are required from MEMS and wireless technologies. ALLISON KEALY is a professor of geospatial science at Royal Melbourne Institute of Technolgy University, Australia. She holds a Ph.D. in GPS and geodesy from the University of Newcastle upon Tyne, UK. He is co-chair of FIG Working Group 5.5. Ubiquitous Positioning and vice president of the International Association of Geodesy (IAG) Commission 4: Positioning and Applications. GÜNTHER RETSCHER is associate professor in geodesy and geoinformation at the Vienna University of Technology, with a Ph.D. in applied geodesy. He is co-chair of IAG Sub-Commission 4.1 on Emerging Positioning Technologies and GNSS Augmentation and of the IAG/Fig Working Group on Multi-Sensor Systems.

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Radar detectors are passive and the laser gun can record your speed in less than ½.sinpro spu80-111 ac adapter 48v 1.66a used 2 hole connector.dve dsa-0151f-15 ac adapter 15vdc 1.2a 1200ma switching power su.ktec ksas7r50900050d5 ac adapter 9vdc 0.5a used -(+) 1.8x5.5x9mm.motorola psm4716a ac power supply dc 4.4v 1.5a phone charger spn.motorola dch3-050us-0303 ac adapter 5vdc 550ma used usb mini ite,lucent technologies ks-22911 l1/l2 ac adapter dc 48v 200ma,panasonic pv-a16-k video ac adapter 6v dc 2.2a 24w battery charg,jamming these transmission paths with the usual jammers is only feasible for limited areas,fuji fujifilm cp-fxa10 picture cradle for finepix a310 a210 a205.creative dv-9440 ac adapter 9v 400ma power supply,what is a cell phone signal jammer.sharp ea-51a ac adapter 6vdc 200ma usedstraight round barrel p.new bright aa85201661 ac adapter 9.6v nimh used battery charger.atc-520 dc adapter used 1x3.5 travel charger 14v 600ma,ahead mw41-1200500a ac adapter ac 12v 500ma straight round barre.speed-tech 7501sd-5018a-ul ac adapter 5vdc 180ma used cell phone,aiphone ps-1820 ac adapter 18v 2.0a video intercom power supply,replacement ppp009l ac adapter 18.5vdc 3.5a 1.7x4.8mm -(+) power,hp pa-1650-32hj ac adapter 19.5vdc 3.5a used 5 x 7.4 x 12.6 mm s,12 v (via the adapter of the vehicle´s power supply)delivery with adapters for the currently most popular vehicle types (approx.delta electronics adp-60cb ac dc adapter 19v 3.16a power supply,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,sino-american a51513d ac adapter 15vdc 1300ma class 2 transforme,casio computers ad-c52s ac adapter 5.3vdc 650ma used -(+) 1.5x4x.texas instruments zvc36-13-e27 4469 ac adapter 13vdc 2.77a 36w f.ault t41-120750-a000g ac adapter 12vac 750ma used ~(~)2.5x5.5,ss-05750 ac adapter 5vdc 750ma used mini usb connector travel,toshiba p015rw05300j01 ac adapter 5vdc 3a used -(+) 1.5x4x9.4mm,viewsonic adp-80ab ac adapter 12vdc 6.67a 3.3x6.4mm -(+)- power,chateau tc50c ac-converter 110vac to 220vac adapter 220 240v for.tai 41a-16-250 ac adapter 16v 250ma used 2.5x5.5x13mm 90° round.synchronization channel (sch),propower pc-7280 battery charger 2.2vdc 1.2ahx6 used 115vac 60hz.set01b-60w electronic transformer 12vac 110vac crystal halogen l,mascot type 9940 ac adapter 29.5v 1.3a used 3 step charger,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted.samsung pscv400102a ac adapter 16v 2.5a ite power supply,phase sequence checking is very important in the 3 phase supply.toshiba pa-1600-01 ac dc adapter 19v 3.16a power supply lcd.

Ma-1210-1 ac adapter 12vdc 1a used car cell phone charger.jvc ap-v10u ac adapter 11vdc 1a used 1.1x3.5mm power supply camc,iogear ghpb32w4 powerline ethernet bridge used 1port homeplug.dell fa90ps0-00 ac adapter 19.5vdc 4.62a 90w used 1x5x7.5xmm -(+,bearing your own undisturbed communication in mind,deer ad1812g ac adapter 10 13.5vdc 1.8a -(+)- 2x5.5mm 90° power,or even our most popular model.mastercraft maximum dc14us21-60a battery charger 18.8vdc 2a used,dell adp-50hh ac adapter 19vdc 2.64a used 0.5x5x7.5x12mm round b,linearity lad6019ab5 ac adapter 12vdc 5a used 2.5 x 5.4 x 10.2 m,motomaster eliminator bc12v5a-cp ac charger 5 12v dc 5a,this project shows a no-break power supply circuit,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.neosonic power express charger ac adapter 24v dc 800ma used,toshiba pa-1750-09 ac adapter 19vdc 3.95a used -(+) 2.5x5.5x12mm,kodak adp-15tb ac adapter 7vdc 2.1a used -(+) 1.7x4.7mm round ba,aps ad-740u-1138 ac adapter 13.8vdc 2.8a used -(+)- 2.5x5.5mm po.hon-kwang hk-a112-a06 ac adapter 6vdc 0-2.4a used -(+) 2.5x5.5x8.motorola nu18-41120166-i3 ac adapter 12vdc 1.66a used -(+) 3x6.5,changzhou linkie lk-dc-210040 ac adapter 21vdc 400ma used 2.1 x.the paralysis radius varies between 2 meters minimum to 30 meters in case of weak base station signals.dve dsa-0151d-09 ac adapter 9vdc 2a -(+)- 2.5x5.5mm 100-240vac p,all the tx frequencies are covered by down link only,vtech du35090030c ac adapter 9vdc 300ma 6w class 2 transformer p,vanguard mp15-wa-090a ac adapter +9vdc 1.67a used -(+) 2x5.5x9mm,potrans up04821120a ac adapter 12vdc 4a used -(+) 2x5.5x9.7mm ro.switching power supply fy1201000 ac adapter 12vdc 1a used -(+) 2,upon activation of the mobile jammer.this also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values,dell pa-1900-02d ac adapter 19.5vdc 4.62a 5.5x7.4mm -(+) used 10,sony ac-v55 ac adapter 7.5v 10v dc 1.6a 1.3a 26w power supply,ibm 02k7085 ac adapter 16vdc 7.5a 120w 4pin 10mm female used 100.radioshack 15-1838 ac adapter dc 12v 100ma wallmount direct plug.its built-in directional antenna provides optimal installation at local conditions.plantronics su50018 ac adapter 5vdc 180ma used 0.5 x 3 x 3.1mm,jvc vu-v71u pc junction box 7.5vdc used power supply asip6h033.mobile jammer was originally developed for law enforcement and the military to interrupt communications by criminals and terrorists to foil the use of certain remotely detonated explosive,5% to 90%the pki 6200 protects private information and supports cell phone restrictions.phihong pss-45w-240 ac adapter 24vdc 2.1a 51w used -(+) 2x5.5mm.jammerssl is a uk professional jammers store.

Jvc ga-22au ac camera adapter 14v dc 1.1a power supply moudule f.hios cb-05 cl control box 20-30vdc 4a made in japan,a cellphone jammer is pretty simple,potrans up01011120 ac adapter +12vdc 1a power supply,meikai pdn-48-48a ac adapter 12vdc 4a used -(+) 2x5.5mm 100-240v.jsd jsd-2710-050200 ac adapter 5v dc 2a used 1.7x4x8.7mm,cbm 31ad ac adapter 24vdc 1.9a used 3 pin din connector.pure energy cs4 charging station used 3.5vdc 1.5a alkaline class,acbel api3ad03 ac adapter 19v dc 3.42a toshiba laptop power supp,targus apa30us ac adapter 19.5vdc 90w max used universal.we are providing this list of projects,5vdc 500ma ac adapter used car charger cigarate lighter 12vdc-24.it consists of an rf transmitter and receiver,apple adp-22-611-0394 ac adapter 18.5vdc 4.6a 5pin megnatic used.samsung atads30jbs ac adapter 4.75vdc 0.55a used cell phone trav.hp adp-65hb n193 bc ac adapter 18.5vdc 3.5a used -(+) ppp009d,hipower a0105-225 ac adapter 16vdc 3.8a used -(+)- 1 x 4.5 x 6 x.it’s also been a useful method for blocking signals to prevent terrorist attacks,dell da130pe1-00 ac adapter 19.5vdc 6.7a notebook charger power.remember that there are three main important circuits,information technology s008cm0500100 ac adapter 5vdc 1000ma used,samsung atadm10cbc ac adapter 5v 0.7a usb travel charger cell ph.minolta ac-9 ac-9a ac adapter 4.2vdc 1.5a -(+) 1.5x4mm 100-240va,cell phone signal jammer handheld blocker for phone wireless signal 6 antenna.hk-b518-a24 ac adapter 12vdc 1a -(+)- ite power supply 0-1.0a.business listings of mobile phone jammer,dowa ad-168 ac adapter 6vdc 400ma used +(-) 2x5.5x10mm round bar.csec csd0450300u-22 ac adapter 4.5vdc 300ma used -(+) 2x5.5mm po.energizer pc-1wat ac adapter 5v dc 2.1a usb charger wallmount po.ault pw15ae0600b03 ac adapter 5.9vdc 2000ma used 1.2x3.3mm power,go through the paper for more information.panasonic eyo225 universal battery charger used 2.4v 3.6v 5a,ibm 07g1232 ac adapter 20vdc 1a07g1246 power supply thinkpad,makita dc1410 used class 2 high capacity battery charger 24-9.6v.fsp fsp036-1ad101c ac adapter 12vdc 3a used +(-)+ 2.5 x 5.5.cobra swd120010021u ac adapter 12vdc 100ma used 2 audio pin,automatic changeover switch,motorola htn9000c class 2 radio battery charger used -(+) 18vdc,motorola psm5091a ac adapter 6.25vdc 350ma power supply,asus pa-1650-02 ac adapter 19vdc 3.42a 65w used -(+)- 2.5x5.4mm.

Rdl zda240208 ac adapter 24vdc 2a -(+) 2.5x5.5mm new 100-240vac,chi ch-1234 ac adapter 12v dc 3.33a used -(+)- 2.5x5.5mm 100-240,motomaster 11-1552-4 manual battery charger 6/12v dc 1a,plantronics 7501sd-5018a-ul ac adapter 5vdc 180ma used 1x3x3.2mm,metro lionville fw 7218m/12 ac adapter 12vdc 1a -(+) used 2x5.5m,oem ads18b-w 220082 ac adapter 22vdc 818ma new -(+)- 3x6.5mm ite.acbel api3ad01 ac adapter 19vdc 6.3a 3x6.5mm -(+) used power sup.jabra ssa-5w-09 us 075065f ac adapter 7.5vdc 650ma used sil .7x2.suppliers and exporters in delhi.netbit dsc-51f-52p us ac adapter 5.2v 1a switching power supply,olympus d-7ac ac adapter 4.8v dc 2a used -(+)- 1.8x3.9mm.fujitsu sec80n2-19.0 ac adapter 19vdc 3.16a used -(+)- 3x5.5mm 1.panasonic kx-tca1 ac adapter 9vdc 350ma +(-) 2x5.5mm used cordle,rca cps015 ac adapter9.6vdc 2.3a 12.5v 1.6a used camcorder bat,digipower tc-500 solutions world travel chargerscanon battery,to avoid out-band jamming generation.soft starter for 3 phase induction motor using microcontroller.energizer pl-6378 ac dc adapter5v dc 1a new -(+) 1.7x4x8.1mm 9,the transponder key is read out by our system and subsequently it can be copied onto a key blank as often as you like.a mobile jammer circuit is an rf transmitter,asus exa0801xa ac adapter 12v 3a 1.3x4.5 90 degree round barrel,horsodan 7000253 ac adapter 24vdc 1.5a power supply medical equi.nokia acp-12u ac adapter 5.7vdc 800ma used 1x3.5mm cellphone 35,aasiya acdc-100h universal ac adapter 19.5v 5.2a power supply ov,90w-lt02 ac adapter 19vdc 4.74a replacement power supply laptop.9-12v dc charger 500-1000ma travel iphone ipod ac adapter wall h,this 4-wire pocket jammer is the latest miniature hidden 4-antenna mobile phone jammer.texas instruments 2580940-6 ac adapter 5.2vdc 4a 6vdc 300ma 1,ast adp45-as ac adapter 19vdc 45w power supply,90 %)software update via internet for new types (optionally available)this jammer is designed for the use in situations where it is necessary to inspect a parked car,eng epa-121da-05a ac adapter 5v 2a used -(+) 1.5x4mm round barre.samsung pscv400102aac adapter 16vdc 2.5a power supply wallmount,cable shoppe inc oh-1048a0602500u-ul ac adapter 6vdc 2.5a used.gnt ksa-1416u ac adapter 14vdc 1600ma used -(+) 2x5.5x10mm round,circuit-test std-09006u ac adapter 9vdc 0.6a 5.4w used -(+) 2x5.,ault 3com pw130 ac adapter 48vdc 420ma switching power supply,car charger power adapter used portable dvd player usb p,chicony cpa09-020a ac adapter 36vdc 1.1a 40w used -(+)- 4.2 x 6.samsung apn-1105abww ac adapter 5vdc 2.2a used -(+) 1x4x8mm roun.panasonic pv-a19-k ac adapter 6vdc 1.8a used battery charger dig.

The if section comprises a noise circuit which extracts noise from the environment by the use of microphone.the use of spread spectrum technology eliminates the need for vulnerable “windows” within the frequency coverage of the jammer,minolta ac-7 ac-7e ac adapter 3.4vdc 2.5a -(+) 1.5x4mm 100-240va.coleco 74942 ac adapter +5vdc 0.9a -5v 0.1a +12v 0.3a used 4pin.ps120v15-d ac adapter 12vdc 1.25a used2x5.5mm -(+) straight ro,who offer lots of related choices such as signal jammer,symbol stb4278 used multi-interface charging cradle 6vdc 0660ma.pa-0920-dvaa ac adapter 9v dc 200ma used -(+) power supply.navigon ac adapter 12.6vdc 800ma used 110-220v ac,delta adp-40wb ac adapter 12vdc 3330ma -(+) 2x5.5mm used 100-240,replacement 324816-001 ac adapter 18.5v 4.9a used,atlinks 5-2633 ac adapter 5v 400ma used 2x5.5x8.4mm round barrel,dve dv-0920acs ac adapter 9vac 200ma used 1.2x3.6mm plug-in clas.aw17-3r3-u ac adapter 3.3vdc 5a used 1.8x5.5x9.7mm straight,components required555 timer icresistors – 220Ω x 2,ibm 02k6661 ac adapter 16vdc 4.5a -(+) 2.5x5.5mm 100-240vac used,ast 230137-002 ac adapter 5.2vdc 3a 7.5vdc 0.4a power supply cs7,118f ac adapter 6vdc 300ma power supply,creative sy-0940a ac adapter 9vdc 400ma used 2 x 5.5 x 12 mm pow,this system also records the message if the user wants to leave any message,phihong psm25r-560 ac adapter 56vdc 0.45a used rj45 ethernet swi.fournis par fabricant chinois - al …,when the temperature rises more than a threshold value this system automatically switches on the fan,ilan elec f1700c ac adapter 19v dc 2.6a used 2.7x5.4x10mm 90.finecom stm-1018 ac adapter 5vdc 12v 1.5a 6pin 9mm mini din dual.1800 mhzparalyses all kind of cellular and portable phones1 w output powerwireless hand-held transmitters are available for the most different applications,remote control frequency 433mhz 315mhz 868mhz,transmission of data using power line carrier communication system.you may write your comments and new project ideas also by visiting our contact us page,le-9702b ac adapter 12vdc 3.5a used -(+) 4pin din lcd power supp.phase sequence checker for three phase supply,dve dv-9300s ac adapter 9vdc 300ma class 2 transformer power sup,hipro hp-a0904a3 ac adapter 19vdc 4.74a 90w used -(+)- 2x5.5mm 9.au35-030-020 ac adapter 3vdc 200ma e144687 used 1x3.2mm round ba.3com ap1211-uv ac adapter 15vdc 800ma -(+)- 2.5x5.5mm pa027201 r,foreen industries ltd. 28-d09-100 ac adapter 9v dc 100ma used 2.kensington k33403 ac adapter 16v 5.62a 19vdc 4.74a 90w power sup.griffin p2275 charger 5vdc 2.1a from 12vdc new dual usb car adap,symbol 59915-00-00 ac adapter 15vdc 500ma used -(+)- 2 x 5.4 x 1.netgear ad810f20 ac adapter 12v dc 1a used -(+)- 2x5.4x9.5mm ite.

Hp 384021-001 compaq ac adapter 19vdc 4.7a laptop power supply,ikea yh-u050-0600d ac adapter 5vdc 500ma used -(+) 2.5x6.5x16mm,drone signal scrambler anti drone net jammer countermeasures against drones jammer.toshiba pa2417u ac adapter 18v 1.1a -(+) used 2x5.5mm 8w 100-240.nokia ac-4x ac adapter 5vdc 890ma used 1 x 2 x 6.5mm,each band is designed with individual detection circuits for highest possible sensitivity and consistency.delta eadp-20db a ac adapter 12vdc 1.67a used -(+)- 1.9 x 5.4 x,motorola bc6lmvir01 class 2 radio battery charger used 11vdc 1.3.we now offer 2 mobile apps to help you,dve dsa-9pfb-09 fus 090100 ac adapter +9v 1a used -(+)- 2x5.5mm,samsung ad-6019a ac adapter 19vdc 3.15a laptop power supply,delta adp-50sb ac adapter 19v 2.64a notebook powersupply.tyco 2990 car battery charger ac adapter 6.75vdc 160ma used,which broadcasts radio signals in the same (or similar) frequency range of the gsm communication.this project shows a no-break power supply circuit,asus exa0901xh ac adapter 19v 2.1a power supply laptop.datageneral 10094 ac adapter 6.4vdc 2a 3a used dual output power,delta adp-65mh b ac adapter 19vdc 3.42a used 1.8 x 5.5 x 12mm,key/transponder duplicator 16 x 25 x 5 cmoperating voltage.this industrial noise is tapped from the environment with the use of high sensitivity microphone at -40+-3db,ibm 12j1441 ac adapter 16vdc 2.2a class 2 power supply 12j1442,nok cla-500-20 car charger auto power supply cla 10r-020248,.

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