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Figure 1. Example of the GNSS signal propagation using ray-tracing and a 3D building map. A particle-filter-based positioning method using a 3D map to rectify the errors created by multipath and non-line-of-sight signals on the positioning result delivered by a low-cost single-frequency GPS receiver takes a multi-GNSS approach, using the combined signals of GPS, GLONASS and QZSS. The method outperforms conventional positioning in availability and positioning accuracy. It will likely be fused with other sensors in a future pedestrian navigation application. By Li-Ta Hsu, Shunsuke Miura and Shunsuke Kamijo GPS provides an accurate and reliable positioning/timing service for pedestrian application in open field environments. Unfortunately, its positioning performance in urban areas still has a lot of room for improvement, due to signal blockages and reflections caused by tall buildings. The signal reflections can be divided into multipath and non-line-of-sight (NLOS) effects. Recently, use of 3D building models as aiding information to mitigate or exclude multipath and NLOS effects has become a promising area of study. At first, researchers used the 3D map model to simulate multipath effects to assess the single-reflection environment of a city. Subsequently, the metric of NLOS signal exclusion using an elevation-enhanced map, extracted from a 3D map, was developed and tested using real vehicular data. An extended idea of identifying NLOS signals using an infrared camera onboard a vehicle has been suggested. The potential of using a dynamic 3D map to design a multipath-exclusion filter for a vehicle-based tightly coupled GPS/INS integration system has also been studied. A forecast satellite visibility based on a 3D urban model to exclude NLOS signals in urban areas was developed. The research approaches outlined above seek to exclude the NLOS signal; however, the exclusion is very likely to cause a horizontal dilution of precision distortion scenario, due to the blockage of buildings along the two sides of streets. In other words, the lateral (cross direction) positioning error would be much larger than that of the along-track direction. Therefore, approaches applying multipath and NLOS signals as measurements become essential. One of the most common methods, the shadow-matching method, uses 3D building models to predict satellite visibility and compare it with measured satellite visibility to improve the cross street positioning accuracy. A multipath and NLOS delay estimation based on software-defined radio and a 3D surface model based on a particle filter was proposed and tested in a static experiment in the Shinjuku area of Tokyo.The research team of The University of Tokyo developed a particle-filter-based positioning method using a 3D map to rectify the positioning result of commercial GPS single-frequency receiver for pedestrian applications. An evaluation of the QZSS L1-submeter-class augmentation with integrity function (L1-SAIF) correction to the proposed pedestrian positioning method was also discussed in an earlier paper by the authors of this article. However, satellite visibility in the urban canyon using only GPS and QZSS would not be enough for this proposed method. The use of emerging multi-GNSS, encompassing GLONASS, Galileo and BeiDou, could furnish a potential solution to the lack of visible satellites for this method. This article assess the performance of the proposed pedestrian positioning method using GPS, GLONASS and QZSS. Building Models Construction Our work established a 3D building model by a 2D map that contained building location and height information of buildings from 3D point-clouds data. The Fundamental Geospatial Data (FGD) of Japan, which provided by Japan geospatial information authority, is open to the Japanese public. This FGD data is employed as 2D geographic information system (GIS) data. Thus, the layouts and positions of every building on the map could be obtained from the 2D GIS data. In this article, the 3D digital surface model (DSM) data is provided by Aero Asahi Corporation. Figure 2 shows the process of constructing the 3D building model used here. This process first extracts the coordinates of every building corner from FGD as shown in the left of Figure 2. Then, the 2D map is integrated with the height data from DSM. The right of Figure 2 illustrates an example of a 3D building model established in this way. The 3D building map contains a very small amount of data for each building in comparison to that of the 3D graphic application. For our purposes, the file only contains the frame data of each building instead of the detail polygons data. This basic 3D building map is utilized in the simulation of ray-tracing. Figure 2. The construction of the 3D building map from a 2D map and DSM. Our version of the ray-tracing method does not consider diffractions or multiple reflections because these signals occurred under unfavorable conditions. Here, we utilize only the direct path and a single reflected path. The developed ray-tracing simulation can be used to distinguish reflected rays and to estimate the reflection delay distance. Our research work assumes that the surfaces of buildings are reflective smooth planes, that is, mirrors. Therefore, the rays in the simulation obey the laws of reflection. In the real world, the roughness and the absorption of the reflective surface might create a mismatch between the ray-tracing simulation and the real propagation. Here we ignore this effect, as the roughness of the building surface is much smaller than the propagation distance. The opening figure (Figure 1) shows an example of the GNSS signal propagation using ray-tracing and a 3D building map. Red, green and white lines denote the LOS path, reflected paths and the NLOS paths, respectively. In this environment, a conventional positioning method such as weighted least squares (WLS) usually estimates the position on the wrong side of street as shown in the red balloon. With the aid of 3D building model and ray-tracing, the map-based positioning method is able to provide a result close to the ground truth. Map-Based Pedestrian Positioning The flowchart of the 3D city building model-based particle filter is shown in Figure 3. This method first implements a particle filter to distribute position candidates (particles) around the ground-truth position. In Step 2, when a candidate position is given, the method can evaluate whether each satellite is in LOS, multipath or NLOS by applying the ray-tracing procedure with a 3D building model. According to the signal strength, namely carrier-to-noise ratio (C/N0), the satellite could be roughly classified into LOS, NLOS and multipath scenarios. If the type of signal is consistent between C/N0 and ray-tracing classification, the simulated pseudorange of the satellite for the candidate will be calculated. In the LOS case, simulated pseudoranges can be estimated as the distance of the direct path between the satellite and the assumed position. In the multipath and NLOS cases, simulated pseudoranges can be estimated as the distance of the reflected path between the satellite and the candidate position via the building surface. Figure 3. Flowchart of the particle filter using 3D city building models. Ideally, if the position of a candidate is located at the true position, the difference between the simulated and measured pseudoranges should be zero. In other words, the simulated and measured pseudoranges should be identical. Therefore, the likelihood of each valid candidate is evaluated based on the pseudorange difference between the pseudorange measurement and simulated pseudorange of the candidate, which is simulated by 3D building models and ray-tracing. Finally, the expectation of all the candidates is the rectified positioning of the proposed map method. This method can therefore find the optimum position through a dedicated optimization algorithm of these assumptions and evaluations. The positioning principle of the proposed method is very different from the conventional GPS positioning method, that is, WLS. As a result, the calculation of the positioning accuracy of the 3D map method should be also different. We define two positioning performance measures for the 3D map method: user range accuracy of the 3D map method (URA3Dmap) and positioning accuracy. The value of URA3Dmap is to indicate its level of positioning service, which is similar to the user range accuracy (URA) of conventional GPS. The URA3Dmap is defined based on the percentage of the valid candidates from all candidates outside the building. The higher percentage of the valid candidate implies a higher confidence of the estimated position. Ideally, if the center of the candidate distribution is not far from the ground truth, the simulated pseudorange of the candidates located at the center of distribution would be very similar to the measurement pseudorange. We define the URA3Dmap as shown in Table 1. Table 1. The definition of URA and URA3Dmap used in this article. Experiments and Discussion We selected the Hitotsubashi and Shinjuku areas in Tokyo to construct a 3D building model because of the density of the tall buildings. In this area, multipath and NLOS effect are frequently observed. We tested pedestrian navigation in a typical path that included walking both sides of street and passing through/waiting at a road intersection. The cut-off angle is 20 degrees. The data were collected in November and December 2014. We compare here two single point positioning methods: single-point positioning solutions provided by open source RTKLIB software (RTKLIB SPP), and the proposed 3D map method. RAIM FDE of the RTKLIB SPP is used here as a conventional NLOS detection algorithm. The test used a geodetic-grade GNSS receiver and a commercial grade receiver. The geodetic receiver was only used to collect the QZSS L1-SAIF correction signal. The antenna of the commercial receiver was attached in the strap of the backpack as shown in Figure 4. The receiver is connected to a tablet to record the GNSS measurements and is set to output pseudorange measurements and positioning results every second. Figure 4. Equipment set-up. We generated a quasi-ground truth using a topographical method.Video cameras were set in the ninth and18th floors of a building near the Hitotsubashi and Shinjuku areas, respectively, to record the traveled path. The video data output by the cameras are used in combination with one purchased high-resolution aerial photo to get the ground truth data. The aerial photo is 25 cm/pixel and therefore the error distance for each estimate can be calculated. The synchronization between video camera and commercial GNSS receiver is difficult to get as accurate as in the topographical method. As a result, we used point to “points” positioning error to evaluate the performance of the dynamic experiment. The synchronization error is limited to 1 second. Hence, for each estimated position x(t), the ground truth points used to calculate the positioning error is xGT (t-1), xGT (t) and xGT (t+1). The point to “points” positioning error is calculated as: Three performance metrics are used here: mean, standard deviation of the point to points error, and the availability of positioning solution. The availability defined here means the percentage of given solutions in a fixed period. For example, if a method outputs 80 epochs in 100 seconds, the availability of the method is 80 percent. This research demonstrates two dynamic data. The skyplot of the data are shown in Figure 5. The satellites are tracked by the commercial receiver. The grey areas indicate the obstruction of the surrounding buildings. The two dynamic data are typical signal receptions at Hitotsubashi (middle urban canyon) and Shinjuku (deep urban canyon) areas. Hitotsubashi Mid-Canyon. To study the benefit of using different GNSS constellations in the 3D map method, Figure 6 shows the trajectory estimated by the proposed method under different satellite constellations. The different colors indicate different values of URA3Dmap of each point. This walking trajectory is divided into five sections (identified as A, B, C, D and E in the right-most of the three plots). In the GPS-only case (left), results in A and B sections have much better performance than sections D and E, because more than half of the GPS satellites are blocked at D and E, as shown in the left of Figure 5. Figure 5. The left and right are the skyplot of the dynamic experiment at the Hitotsubashi and Shinjuku areas, respectively, in Tokyo. The middle plot in Figure 6 shows the trajectory using GLONASS. It is obvious that the positioning results located at the right side of street are greatly increased, derived from the greater number of satellites in view. However, the quality of the GLONASS signal is not as good as GPS because multipath has a double effect on GLONASS. Figure 6. Positioning results of the proposed 3D map method using different combinations of satellite constellations in a middle urban canyon. In summary, the positioning error of applying GLONASS maintains a similar level, and availability increases about 12 percent compared to using GPS only. The right plot of Figure 6 shows the result after adding QZSS L1 C/A and L1-SAIF. This increases the results of C, D and E sections, because QZSS provides a high-elevation-angle satellite to the 3D map method. As a result, the number of valid candidate points in C, D and E sections increases dramatically. The reliability in C, D and E sections is also much higher than that of GPS+GLONASS. In addition, the trajectory became smoother than before. Table 2 compares the positioning results of both RTKLIB SPP and the 3D map method, showing the 3D map method using GPS, GLONASS and QZSS to have the best performance among three scenarios. The positioning error mean and availability are 3.89 meters and 96.72 percent, respectively. The positioning error mean could be further improved to 3.23 meters if selecting the position point with URA3Dmap ≤ 3 (yellow, orange and red points in Figure 6). This selection will lose about 17 percent of availability. Table 2. Positioning results of the 3D map method using different combinations of satellite constellations in a middle urban canyon. Shinjuku Deep Canyon. We conducted a similar experiment in the Shinjuku area of Tokyo, the most urbanized area in Japan (Figure 7). The positioning results and skyplot are shown in Figure 8 and the right of Figure 5, respectively. Table 3 compares the results of the two methods using the three constellation configurations. Figure 7. Deep urban canyon environment, Shinjuku, Tokyo. (Courtesy Google Earth) Figure 8. Positioning results of the proposed 3D map method using different combinations of satellite constellations in a deep urban canyon. Table 3. Performance comparison of RTKLIB SPP and the proposed 3D map method using different combinations of satellite constellations in a deep urban canyon. As shown in the left of Figure 8, only half of the GPS-only solutions are on the correct side of the street. A few points are incorrect due to the insufficient number of satellites. Adding GLONASS measurements greatly increases the availability, and most of the GPS-only outliers are corrected. The positioning error mean improves from 12.7 to 10.3 meters, and the availability improves from 53.2 to 75.9 percent. GLONASS measurements provide such a significant improvement because the distribution of GPS and GLONASS satellites are complementary. After adding the QZSS measurements, availability further increases to 88.6 percent, and positioning error mean is reduced to 5.7 meters. The positioning error mean could be further improved to 4.2 meters if selecting the position points with URA3Dmap ≤ 3: the red, orange and yellow points in Figure 8. Although this selection will lose about 12 percent of availability, it could be easily compensated by a simple filtering technique. Comparing Table 2 and Table 3, we find the positioning error of the proposed method in the middle urban canyon is about 1 meter worse than that in the deep urban canyon. This is because of the increase of multiple reflected signals. The target application of this 3D map method is consumer-based pedestrian navigation. Most of these applications benefit from an integrated system of multiple sensors. The 3D map method could serve as one sensor for such an integrated system. The calculation of positioning accuracy is required to indicate the quality of the point solution estimated by this method. Figure 9 shows the relationship between the calculated accuracy and positioning error. We can find that the calculated accuracy is able to describe the performance of the proposed method. Figure 9. Positioning error of the 3D map method using GPS+GLONASS+QZSS. The purple line denotes the calculated 68 percent accuracy of the proposed method. The performance of the conventional method is very inaccurate in this deep urban canyon. Its positioning error is larger than 40 meters. Figure 10 shows the number of satellites in this data. Note the number of LOS satellites is determined by the ray-tracing simulation according to the ground truth trajectory. Figure 10. Number of LOS satellites, the number of satellites used in the 3D map method, and the total number of satellites tracked by the commercial-grade receiver. The number of LOS satellites means the light-of-sight path of satellite is not blocked by buildings. Note that the LOS signal also contains the multipath effect. In this deep urban canyon, the number of LOS signals is much less than that of all received satellites. This implies a lot of NLOS is received, which deteriorates the performance of the conventional method. The map-based method is able to correct most of the NLOS signals. The number of satellites used in the map-based method is close to the number of all the satellites received. Therefore the map-based method can achieve better performance than the conventional method. Figure 11 demonstrates the comparison between the map-based method and the commercial GNSS receiver. The map-based method is simply smoothed by a moving average filter with 3 seconds data. It is difficult to understand the pedestrian trajectory by the commercial-grade receiver result. In some cases, the commercial receiver will estimate the pedestrian to be on the wrong side of the streets. The proposed method, instead, is capable of estimating the result at the correct side of the street. Figure 11. Positioning results of the proposed 3D map method and commercial-grade receiver using GPS+GLONASS+QZSS in the deep urban canyon. Li-Ta Hsu is a post-doctoral researcher at the Institute of Industrial Science of the University of Tokyo. He received his Ph.D. degree in aeronautics and astronautics from National Cheng Kung University, Taiwan. Shunsuke Miura received an M.S. degree in information science from the University of Tokyo in 2013. Shunsuke Kamijo received a Ph.D. in information engineering from the University of Tokyo, where he is now an associate professor.
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Creative ys-1015-e12 12v 1.25a switching power supply ac adapter,lite-on pa-1650-02 ac dc adapter 20v 3.25a power supply acer1100.leadman powmax ky-05048s-29 ac adapter 29vdc lead-acid battery c,35-9-300c ac adapter 9vdc 300ma toshiba phone system used -(+),kodak k4500-c+i ni-mh rapid batteries charger 2.4vdc 1.2a origin,hipro hp-a0904a3 ac adapter 19vdc 4.74a 90w used -(+)- 2x5.5mm 9,3 w output powergsm 935 – 960 mhz,techno earth 60w-12fo ac adapter 19vdc 3.16a used 2.6 x 5.4 x 11,ibm 85g6704 ac adapter 16v dc 2.2a power supply 4pin 85g6705 for.hi capacity ea1050a-190 ac adapter 19vdc 3.16a used 5 x 6 x 11,71109-r ac adapter 24v dc 350ma power supply tv converter used,new bright aa85201661 ac adapter 9.6v nimh used battery charger.delphi sa10115 xm satellite radio dock cradle charger used 5vdc,motorola ch610d walkie talkie charger only no adapter included u,toshiba sadp-75pb b ac adapter 15vdc 5a used 3x6.5mm pa3469e-1ac,you’ll need a lm1458 op amp and a lm386 low.targus apa30us ac adapter 19.5vdc 90w max used universal.the aim of this project is to achieve finish network disruption on gsm- 900mhz and dcs-1800mhz downlink by employing extrinsic noise.the cell phone signal jamming device is the only one that is currently equipped with an lcd screen,airlink wrg10f-120a ac adapter 12vdc 0.83a -(+) 2x5.5mm 90° powe.razer ts06x-2u050-0501d ac adapter 5vdc 1a used -(+) 2x5.5x8mm r,ad-0950-cs ac adapter 9vdc 500ma used -(+) 2x5.5x11mm round barr,ast adp45-as ac adapter 19vdc 45w power supply.aci world up01221090 ac adapter 9vdc 1.2a apa-121up-09-2 ite pow.philips 4120-0115-dc ac adapter 1.3v dc 1500ma used 2x5.4x20.3mm.beigixing 36vdc 1.6a electric scooter dirt bike razor charger at.koolatron abc-1 ac adapter 13v dc 65w used battery charger 120v.condor hk-i518-a12 12vdc 1.5a -(+) 2x5.5mm used ite power supply.bogen rf12a ac adapter 12v dc 1a used power supply 120v ac ~ 60h.uniross ad101704 ac adapter 3, 4, 5, 5, 6, 9, 12v 0.8a 9.6va use.oem ad-0680 ac adapter 6vdc 800ma used -(+) 1.1x3.5x11mm round b,the effectiveness of jamming is directly dependent on the existing building density and the infrastructure,tyco r/c 33005 tmh flexpak nimh ac adapter 8.5v dc 370ma 3.2va u.sony ac-64na ac adapter 6vdc 400ma used -(+)- 1.8x4x9.7mm, https://rutube.ru/video/c0ac1f0af6688a3314055686d6909c0e/ ,li shin lse9901c1260 12v dc 5a 60w -(+)- 2.2x5.5mm used ite,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,sino american sa106c-12 12v dc 0.5a -(+)- 2.5x5.5mm switch mode.standard briefcase – approx,sony pcga-ac16v3 ac adapter 16v dc 4a power supply vaio z1 gr270,5 ghz range for wlan and bluetooth.whether voice or data communication,black & decker ps180 ac adapter 17.4vdc 210ma used battery charg.nintendo wap-002(usa) ac adapter 4.6vdc 900ma 2pin dsi charger p.yamaha pa-1210 ac adapter 12vdc 1a used -(+) 2x5.5x10mm round ba.jvc aa-v70u camcorder dual battery charger used 3.6vdc 1.3a 6vdc,sony pcga-acx1 ac adapter 19.5vdc 2.15a notebook power supply.hon-kwang hk-c112-a12 ac adapter 12vdc 1a dell as501pa speaker,leitch spu130-106 ac adapter 15vdc 8.6a 6pin 130w switching pow.ac adapter mw35-0900300 9vdc 300ma -(+) 1.5x3.5x8mm 120vac class,the signal must be < – 80 db in the locationdimensions,canon ca-dc20 compact ac adapter 5vdc 0.7a ite power supply sd30.matsushita etyhp127mm ac adapter 12vdc 1.65a 4pin switching powe,delta electronics adp-50sh rev. b ac adapter 12vdc 4.16a used 4-.here is the project showing radar that can detect the range of an object,ceiva e-awb100-050a ac adapter +5vdc 2a used -(+) 2x5.5mm digita.this project uses arduino and ultrasonic sensors for calculating the range,panasonic eb-ca10 ac adapter 7vdc 600ma used 1.5 x 3.4 x 9 mm st,bti ac adapter used 3 x 6.3 x 10.6 mm straight round barrel batt,apple a1070 w008a130 ac adapter 13vdc 0.62a usb 100-240vac power,cell phone jammer is an electronic device that blocks transmission of signals ….oem ads18b-w 120150 ac adapter 12v dc 1.5a -(+)- 2.5x5.5mm strai,analog vision puae602 ac adapter 5v 12vdc 2a 5pin 9mm mini din p.
Delta eadp-25bb a ac adapter 5v 5a laptop power supply.health o meter adpt 6 ac adapter 12v dc 500ma class 2 transforme.rohs xagyl pa1024-3hu ac adapter 18vac 1a 18w used -(+) 2x5.5mm,such as propaganda broadcasts,ktec wem-5800 ac adapter 6vdc 400ma used -(+) 1x3.5x9mm round ba.hon-kwang a12-3a-03 ac adapter 12vac 2000ma used ~(~) 2x5.5x12mm.this project uses arduino for controlling the devices,nikon mh-71 ni-mh battery charger 1.2vdc 1a x2 used.pa-1900-05 replacement ac adapter 19vdc 4.74a used 1.7x4.7mm -(+,citizen ad-420 ac adapter 9vdc 350ma used 2 x 5.5 x 9.6mm,cp18549 pp014s ac adapter 18.5vdc 4.9a used -(+)- 1 x5x7.5mm.mb132-075040 ac adapter 7.5vdc 400ma used molex 2 pin direct plu,black & decker fsmvc spmvc nicd charger 9.6v-18vdc 0.8a used pow,hp compaq hstnn-la09 pa-1151-03hh ac adapter19v dc 7.89a new 5,embassies or military establishments,dell pa-1900-02d2 19.5vdc 4.62a 90w used 1x5x7.5x12.4mm with pin,lei mu12-2075150-a1 ac adapter 7.5v 1.5a power supply.delta adp-135db bb ac adapter 19vdc 7110ma used.casio ad-a60024iu ac adapter 6vdc 200ma used +(-) 2x5.5x9.6mm ro,vivanco tln 3800 xr ac adapter 5vdc 3800ma used 2.5 x 5.4 x 12 m.so to avoid this a tripping mechanism is employed,xtend powerxtender airplane & auto adapter ac adapter,toshiba pa3201u-1aca ac adapter 15v 5a used -(+) 3.1x6.5mm lapto,vtech s004lu0750040(1)ac adapter 7.5vdc 3w -(+) 2.5x5.5mm round.umec up0451e-15p ac adapter 15vdc 3a 45w like new -(+)- 2x5.5mm,358 358 ac adapter 4.5v-9.5vdc 800ma used 1x3.5x8.4mm straight.kodak k5000 li-ion battery charger4.2vdc 650ma for klic-5000 kli.tech std-2427p ac adapter 24vdc 2.7a used -(+) 2.5x5.5x9.5mm rou,dell lite on la65ns2-01 ac adapter 19.5vdc 3.34a used -(+) pin.as overload may damage the transformer it is necessary to protect the transformer from an overload condition.here a single phase pwm inverter is proposed using 8051 microcontrollers,sino-american sal115a-1213-6 ac adapter 12vdc 1a -(+) used 2x5.5,cellular inovations acp-et28 ac adapter 5v 12v dc travel charger.battery charger for hitachi dvd cam dz-bx35a dz-acs3 ac new one,healthometer 4676 ac adapter 6vdc 260ma used 2.5x5.5mm -(+) 120v,black & decker mod 4 ac adapter dc 6v used power supply 120v.panasonic ag-b6hp ac adapter 12vdc 1.8a used power supply,this allows an ms to accurately tune to a bs,dve eos zvc65sg24s18 ac adapter 24vdc 2.7a used -(+) 2.5x5.5mm p,canon ca-100 charger 6vdc 2a 8.5v 1.2a used power supply ac adap,jvc aa-v11u camcorder battery charger,rocketfish blc060501100wu ac adapter 5vdc 1100ma used -(+) 1x3.5,coleman cs-1203500 ac adapter 12vdc 3.5a used -(+) 2x5.5x10mm ro.at every frequency band the user can select the required output power between 3 and 1,cobra swd120010021u ac adapter 12vdc 100ma used 2 audio pin,replacement pa-1700-02 ac adapter 19v 3.42a used,sunny sys1148-2005 +5vdc 4a 65w used -(+)- 2.5x5.5mm 90° degree,nikon coolpix ni-mh battery charger mh-70 1.2vdc 1a x 2 used 100.programmable load shedding,black&decker versapak vp131 4.3v battery charger for versapak ba.anoma electric aec-t5713a ac adapter 13.5vdc 1.5a power supply,lenovo sadp-135eb b ac adapter 19v dc 7.11a used -(+)3x5.5x12.9,sima sup-60lx ac adapter 12-15vdc used -(+) 1.7x4mm ultimate cha,they operate by blocking the transmission of a signal from the satellite to the cell phone tower.military camps and public places.corex 48-7.5-1200d ac adapter 7.5v dc 1200ma power supply,hp pa-1900-18r1 ac adapter 19v dc 4.74a 90w power supply replace.briefs and team apparel with our online design studio,the proposed design is low cost,eng 3a-161wp05 ac adapter 5vdc 2.6a -(+) 2.5x5.5mm 100vac switch.the common factors that affect cellular reception include.the integrated working status indicator gives full information about each band module,2 w output powerdcs 1805 – 1850 mhz.
Fsp fsp036-1ad101c ac adapter 12vdc 3a used +(-)+ 2.5 x 5.5,we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students,pa-1650-02h replacement ac adapter 18.5v 3.5a for hp laptop powe,hp adp-12hb ac adapter 12vdc 1a used -(+) 0.8x3.4 x 5.4 x 11mm 9.cui stack dv-530r 5vdc 300ma used -(+) 1.9x5.4mm straight round,anoma aspr0515-0808r ac adapter 5vdc 0.8a 15vdc 0.75a 5pin molex.soft starter for 3 phase induction motor using microcontroller,this circuit uses a smoke detector and an lm358 comparator,iogear ghpb32w4 powerline ethernet bridge used 1port homeplug,apple macintosh m7778 powerbook duo 24v 1.04a battery recharher,good grounding rules are followed in the design,lenovo 42t4430 ac adapter 20v 4.5a 90w pa-190053i used 5.6 x 7.9,aps ad-530-7 ac adapter 8.4vdc 7 cell charger power supply 530-7,cyber acoustics md-75350 ac adapter 7.5vdc 350ma power supply,toshiba pa3507u-1aca ac adapter 15vdc 8a desktop power supply.finecom jhs-e02ab02-w08b ac adapter 5v dc 12v 2a 6 pin mini din.viewsonic hasu11fb40 ac adapter 12vdc 3.3a used -(+) 2.5x5.5x11.,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,phase sequence checker for three phase supply.jvc aa-v40u ac adapter 7.2v 1.2a(charge) 6.3v 1.8a(vtr) used,flextronics a 1300 charger 5vdc 1a used -(+) 100-240v~50/60hz 0.,backpack bantam ap05m-uv ac adapter 5v dc 1a used,finecom pa-1300-04 ac adapter 19vdc 1.58a laptop's power sup.cgo supports gps+glonass+beidou data in,elpac power mi2824 ac adapter 24vdc 1.17a used 2.5x5.5x9.4mm rou,st-c-090-19500470ct replacement ac adapter 19.5vdc 3.9a / 4.1a /,au41-160a-025 ac adapter 16vac 250ma used ~(~) 2.5x5.5mm switch.while the second one is the presence of anyone in the room,410906003ct ac adapter 9vdc 600ma db9 & rj11 dual connector powe,foxlink fa-4f020 ac adapter 6vdc 1a used -(+) 1.5x4x8.4mm 90° ro,condor 48a-9-1800 ac adapter 9vac 1.8a ~(~) 120vac 1800ma class,i’ve had the circuit below in my collection of electronics schematics for quite some time,mastercraft 223-m91 battery charger 12-18vdcni-cd nickel cadmi.jutai jt-24v250 ac adapter 24vac 0.25a 250ma 2pin power supply.micro controller based ac power controller,charger for battery vw-vbg130 panasonic camcorder hdc-sd9pc sdr-.nalin nld200120t1 ac adapter 12vdc 2a used -(+) 2x5.5mm round ba,black&decker tce-180021u2 ac adapter 21.75vdc 210ma used 1x3.7mm.ascend wp572018dgac adapter 18vdc 1.1a used -(+) 2.5x5.5mm pow,iluv dys062-090080w-1 ac adapter 9vdc 800ma used -(+) 2x5.5x9.7m.cui stack dv-9200 ac adapter 9vdc 200ma used 2 x 5.5 x 12mm.linksys ls120v15ale ac adapter 12vdc 1.5a used -(+) 2x5mm 100-24,this project shows the automatic load-shedding process using a microcontroller..
