The circuit board

Xem 1-20 trên 35 kết quả The circuit board
  • High quality, high density, and well-aligned zinc oxide (ZnO) nanorods have been synthesized on cost-effective printed circuit board (PCB) substrates via a simple, seedless, onestep, low-temperature hydrothermal method based galvanic cell structure. It was found that the outer diameters of the ZnO nanorods range from 50 nm to 400 nm.

    pdf5p truongtien_09 08-04-2018 27 0   Download

  • Results of copper and lead recovery from discarded printing circuit boards (PCB) by acidic dissolution and electrodeposition are presented. A preliminary procedure of the recovery process is proposed with the following steps: disposal of the mounted electrical elements, cleaning, grinding, iron separation for grains screening, metal dissolution, and electrolysis.

    pdf9p cumeo3000 01-08-2018 22 0   Download

  • They now include finer conductor tracks and thinner laminates, present in an ever-increasing number of layers. Integrated circuits have become dramatically sophisticated especially in the last decade. This has in turn created new design requirements for mounting them on the boards. While insertion was common with DIP (dual in- line-package) technology in the 1970s, surface mount technology in now being increasingly employed. holes is increasing; and hole diameters are rapidly decreasing.

    pdf717p killporn 06-04-2012 290 76   Download

  • In this study, the liberation of metals from computer PCBs was conducted in detail by mechanical processes including cutting and crushing. The obtained results demonstrate the distribution metallic and non-metallic component weighs as a function of particle sizes.

    pdf7p cumeo3000 01-08-2018 8 0   Download

  • The process of copper leaching by sulfuric acid solution was studied using experimental planning methods using the simulation software Modde 5.0. The parameters were calculated and simulated to evaluate the effect of the acid concentration, leaching time, and the ratio between the solid and liquid phases on the leaching efficiency. The obtained results by simulation were compared with real experimental results. The obtained results from this study are planning in the actual deployment of the Hanoi Urban Environment One Member Limited Company in Vietnam.

    pdf5p giesumanh 10-11-2018 17 0   Download

  • The surface inclination angles were 0, 45, 90, 135, and 180. Results showed the Onset of Nucleate Boiling (ONB) heat flux increased with increasing heater orientation from 0 to 90, while early ONB occurred when the heater faced downwards (135 and 180). The nucleate boiling was observed to be unstable at low heat flux (1e21% of CHF) and changed into typical boiling when the heat flux was above 21% of CHF.

    pdf11p minhxaminhyeu3 25-06-2019 7 0   Download

  • Recycling printed circuit boards (PCBs) is an important solution not only to treat hazardous waste but also to recover valuable materials. This research focus on optimizing the leaching copper process from waste PCBs to recycle. This process was performed in Fe2(SO4)3 solution at room temperature and using H2O2 as an oxidant. For optimization, response surface methodology was used to investigate the different parameters, including Fe2(SO4)3 concentration, volume of H2O2 addition and leaching time.

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  • In this work, ZnO nanorods (NRs) were successfully grown on printed circuit board substrates (PCBs) by utilizing a one-step, seedless, low-cost hydrothermal method. It was shown that by implementing a galvanic cell structure in an aqueous solution of 80 mM of zinc nitrate hexahydrate and hexamethylenetetramine, ZnO NRs can directly grow on the PCBs substrate without the assistance of a seed layer. The effect of hydrothermal time on the surface morphologies, and the crystallinity of the as-grown ZnO nanorods (NRs) was also investigated.

    pdf8p 12120609 01-06-2020 2 0   Download

  • The relationship between the manufacturers of electronic components and the assemblers of electronic circuitry resembles that between two different orders of living beings, for example insects and plants: they need one another to be able to exist, and for that reason there are close links between the evolutionary paths of both. The shapes and the dimensions of their bodies, or respectively their functions, must match one another, so that whatever is needed to ensure the survival of either species can be properly performed. Any mistakes or mismatches are punished by extinction....

    pdf389p beobobeo 01-08-2012 84 20   Download

  • PRINTED CIRCUIT Processes & Instructions Why make a PC Board?? This may sound like a strange question, considering that we are promoting PC board making products here. However, there are times when a PC board is not necessary and may require a lot more time than you want to spend. A PC board will provide repeated accuracy for any quantity of the same board, but if you are making just one, why not use a Protoboard instead?

    pdf11p balanghuyen 13-01-2010 110 11   Download

  • In this paper we have designed two new compact Photonic Band Gap Structures, shows the properties of Band stop filters. Photonic Band gap filters are designed on central frequencies 1.7GHz and 2.2GHz. These Photonic filters are stable and observable. Also used photonic band gap structure on the filter surfaces, have been provided information about the increasing bandwidth up to 30% of band stop filters.

    pdf5p byphasse043256 21-03-2019 13 0   Download

  • For your electronics hobby entertainment; ENJOY! It is assumed that you have AT LEAST the equivalent of a Basic Electronics certificate for the electronics projects listed on this page. Other projects require more advanced electronics. A lot of these circuits assume the latter so I will no longer answer the tons of emails in regards to that. If you wish to learn more about electronics there is enough of that available on the internet. Circuits' Message Board Ask your questions here. Someone may answer them....

    pdf124p portalix 05-04-2011 259 87   Download

  • Circuit connections to the DAQ require a cable and a facility for connecting to individual pins. An efficient system is based on a National Instruments Connector Block (CB-68LP) and a basic circuit board as shown here. Connections to the circuit board from the connector block are made one time. The two resistors of the circuit are connected to output channels 0 and 1, respecively. Thus, for example, Chan0_out, as noted, is dedicated to the top strip on the circuit board. The bottom top strip is associated with Chan0_in, and so forth....

    pdf30p longmontran 15-01-2010 136 56   Download

  • Most people look at an electronic circuit diagram, or a printed circuit board, and have no idea what they are. One component on the board, and one little squiggle on the diagram, looks much as another. For them, electronics is a black art, practised by weird techies, spouting untranslatable jargon and abbreviations which make absolutely no sense whatsoever to the rest of us in the real world.

    pdf289p nguyenthai_thinh 16-03-2013 60 20   Download

  • Sau khi trải qua quá trình và đấu tranh để thiết kế một mạch điện tử, nên kết quả trong hình thức của một sơ đồ mạch, bạn đã đạt đến giai đoạn cần phải tạo ra mạch của bạn ở một mức độ vật lý. Thiết kế bảng mạch in có thể được khó khăn như là tốt, kể từ khi bạn có thể bao gồm những sai lầm từ mạch của bạn biểu đồ và có thể tạo ra một số nhiều hơn với thủ tục này (trừ khi bạn đang rất cẩn thận). Nhưng thư giãn tạo một PCB (hy vọng) có...

    pdf42p hoatuongvihong 06-11-2011 67 13   Download

  • Today's defense systems incorporate an increasing number of electronic components, intended to enable these systems to be more accurate, more sophisticated, and more effective. Advances in printed circuits and associated interconnection—an integral technology—have enabled this trend, and these advances are expected to continue to enable future combat systems.

    pdf95p camnhung_1 14-12-2012 57 3   Download

  • A control system is a collection of components working together under the direction of some machine intelligence. In most cases, electronic circuits provide the intelligence, and electromechanical components such as sensors and motors provide the interface to the physical world. A good example is the modern automobile. Various sensors supply the on-board computer with information about the engine’s condition. The computer then calculates the precise amount of fuel to be injected into the engine and adjusts the ignition timing. T...

    doc661p hoanglong89hui 24-06-2010 235 104   Download

  • This tutorial presents an introduction to Altera’s SOPC Builder software, which is used to implement a system that uses the Nios II processor on an Altera FPGA device. The system development flow is illustrated by giving step-by-step instructions for using the SOPC Builder in conjuction with the Quartus R II software to implement a simple system. The last step in the development process involves configuring the designed circuit in an actual FPGA device, and running an application program.

    pdf19p longmontran 15-01-2010 189 78   Download

  • OrCAD is a suite of tools from Cadence for the design and layout of printed circuit boards (PCBs). We are currently using version 9.2 of the OrCAD suite. This document will give you a crash course in designing an entire circuit board from start to finish. This will be a very small and simple circuit, but it will demonstrate the major concepts and introduce the tools behind completing a PCB design. After you have completed this tutorial, you will know all the steps needed to make PCBs using OrCAD. This is not, however, a guide to the inner workings of...

    pdf55p sirdanhvt 10-12-2009 187 68   Download

  • Layout Plus is a circuit board layout tool that accepts a layout-compatible circuit netlist (ex. from Capture CIS) and generates an output layout files that suitable for PCB fabrication. This tutorial is the second part of PCB project tutorial. Before start with Layout Plus, you need to have a complete netlist of your design, if you do not have it yet, please read the first part on “Capture CIS Tutorial”. Simple steps in producing PCB layout involve importing netlist, placing components, routing and generating output files and reports.

    pdf14p thachcotran 08-02-2010 184 36   Download



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