irregular, rule and grid.
(1) Irregular Arrangement
The axis directions of components are inconsistent with each other, which is convenient for layout of printed wires, and the plane utilization is high and the distribution parameters are small, which is especially beneficial to high-frequency circuits.
PCB Resources Network-p c B resource Source Network(2) Rule Arrangement
The axes of components are arra
, the name of the Scandinavian kings.) )-----------Wireless LANWireless LAN, is the development of the local area network, the standard is IEEE802.11, IEEE802.11b and ieee802.11a. where 802.11bWorking in the 2.4GHz band, bandwidth up to 11Mbps. While 802.11a is defined in the 5GHz band, bandwidth is expected to reach 54mb/s. But correspondingly, WirelessHomeRFHomeRF is a combination of IEEE802.11 and DECT, designed primarily for home networking, designed to reduce costs. HomeRF also uses spread
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The final purpose of PCB layout is to produce applications. When it becomes a formal and valid product, layout's work is regarded as a paragraph. In layout, which common key points should be paid attention to so that the files drawn by myself can effectively comply with the general
After four years of graduation, although the driver of embedded real-time software systems has been working for some time, the title of "Hardware Engineer" has always been available. In fact, it is a bit embarrassing, not to mention the depth of the hardware, in addition to a considerable amount of time to design the hardware circuit, more importantly, the PCB layout
I. Circuit board DESIGN steps
In general, the basic process of designing a circuit board can be divided into three major steps.
(1). circuit schematic design: circuit schematic design is mainly PROTEL099 schematic design system (advanced Schematic) to draw a schematic diagram of the circuit. In this process, to make full use of the various schematic drawing tools provided by PROTEL99, various editing functions, to achieve our goal, that is, to get a correct, beautiful circuit schematic diagram
. Next, designers can use the powerful features of Cadence PCB software in high-speed and high-density PCB design to complete their own design.
If you have already done PCB layout in Protel, The script Function of Allegro can reproduce the
Sinox, Macau, China many platform CAD graphics, PCB board, IC I know, HDL hardware description Language narrative, circuit simulation and design software, elemental analysis table, can open the eyes of the world.Recent research Sinox the implementation of Windows edition Protel,powerpcb,autucad, which is considered very cumbersome. On the other thought, Sinox the following in fact there are a lot of auxilia
ibisVersion1.0 was launched for the first time in April 1993, and version1.1 was released after modification in June of the same year.Version2.0 was adopted in San Diego in, and upgradedVersion2.1 version, in December 1995 its version2.1 version became ANSI/EIA-656 standard, 1997Version3.0 was released in 62012. In of the same year, it was accepted as the IEC-1 standard and upgradedVersion3.1, the latest version of version3.2 was released in January 1999.IBIS is itself a file format that descri
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Schematic Design Software: orcad can be used, and supports a large number of netlist, which is basically industry standard.
PCB layout Software
1. Protel, now push alicloud designer. The mainstream of low-end design in China is basically useless in foreign countri
Install the Open Source PCB printed circuit board design software Fritzing in Ubuntu
Fritzing is a set of software for designing Printed Circuit boards (Printed Circuit Board), especially for designers, artists, researchers and amateur players. Like Processing and Arduino, Fritzing developers design this software in t
Fritzing is a set of software designed for PrintedCircuitBoard printed circuit boards. It is a tool especially intended for designers, artists, researchers, and amateurs. Like Processing and Arduino, Fritzing developers design this software in the spirit of openness, simplicity, and sharing. Fritzing is a simple and easy-to-use software operation interface, this
, M is used to install Mac.Software preparationSoftware Download Link: Http://pan.baidu.com/s/1eQtcnOQThe description of the software function describes for example the following:Mavericks_10.9.3_13d65.cdr:os X Mavericks 10.9.3 (13d65) lazy version installation image, 5 multi-GWin Chameleon Chameleon Install 2281:mac installation tool, Windows8+mac dual boot Boot
space is about 150 GB), L and M are not formatted, L is used to burn Mac installation image, and M is used to install Mac.
Software preparation
Software Download link: http://pan.baidu.com/s/1eQtcnOQ
The software features are described as follows:
Mavericks_10.9.3_13D65.cd
ObjectiveiOS engineers have always been so high-cornered, using a Mac computer, playing the iphone, wow click ~ ~However, as an iOS development engineer, we must be all-powerful except for the high-force. You do not point UI design, do not point the background language, do not point Android development ... That's not going to happen.Well, we're not here to blow the whistle today. But for everyone to add the Tiger Wing. iOS development has been done fo
. However, Office2008 has a new version of Entourage, which is a match for Outlook, but does not use the latter's file format. Entourage can also be as Outlook, compatible with Microsoft Exchange servers used by the enterprise, and connected to the e-mail system of individual users. However, Mac version of Office software also contains a new user interface, called Elementsgallery. It is a narrow strip place
to switch more convenient.In addition, the general keyboard and Mac keyboard layout is not the same, forced to apply the configuration may be awkward, with the profile switch is also very convenient.Add:1. Using karabiner-elements to change the key, there are some limitations. For example, I changed the Grave key (') to delete, but also want to press shift+delete out the wavy line ~ How to do it? can use B
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