Because there is a professional software installed on win10 is not compatible, and I urgently need to calculate, screenshot, writing, and this software is installed on another win7 is OK, but the two computers back and forth too much trouble, and win7 The notebook is only 12.5 inches. For the simulation software, the screen is too inconvenient for operation. At the same time, it is also considered that it is impossible to backs up two notebooks every day. It is so silly, so there is a chance to install a win7 virtual machine. Thoughts (finally have a chance to toss)
Second, choose virtual softwareThere are a lot of virtual machine software, in the mainstream of the use of several, well, I read so few, one is win10 Professional and Enterprise Edition comes with hyper-V, my target notebook X1 carbon is home Edition Genuine , And did not take the time to study how to directly upgrade the system version. . . Then vmware player, free, pro to spend money or forget, free features are enough for general use; the other is virtualbox, the reason is not used this vbox, because in its official website read half a day in English, not sure in the end to download which file. . . . Vmware can at least find the free version on the official website, the link is as follows:
Currently only the 64-bit version of windows and Linux, this player is called VMware Workstation 12.5 Player, the latest version (the latest version is always a little trouble, afterwards).
The vbox's official website link here is also free, download which one of you to judge. . .
Vmware player installation is relatively simple, and then create a virtual machine is also more convenient, Baidu Raiders also a lot.
Why don't you just press Baidu to download the virtual machine software link, but you must go to the official website?
For me who has been running naked with no anti-virus software, the software under the official website is more reliable than the software network, and it does not need to worry about bundled junk software and will not slow down the system speed. On the other hand, it has not been able to find a good software indexing website (such as niche software, of course, is too small, and the public's software can't find it.)
Third, download win7 iso image and installationThere are many ways to install the win7 system. The most commonly used online search is to load the ISO from the CD/DVD (that is, detect the physical optical drive automatically), or directly load the ISO (use the ISO image file), or use the virtual CD-ROM to load the ISO, but there is a bit of a problem with ISO. Requirements, some ISO may not work, I just do not like that kind of, is a relatively pure version of the vision comes with a full SP version, may be released on the official website.
This is how the ISO will not work. Downloading new ones will take time to find them. It's too much trouble, so I thought that I usually use U disk to start installation.
Then U disk to start the installation is not directly inserted into the U disk and then access to the virtual machine to set the startup sequence will be completed, because after all it is a virtual machine, the U disk will be off after shutdown, restart the boot will not be able to identify. Therefore, it is still necessary to set the U disk to a hard disk. This guide Baidu "Virtual Machine U disk installation" will be able to find a lot of posts, are generally the same, it will not go into details. This is more detailed. This post is also straightforward to say, like me, the U disk to start the installation is to eat full of things that people do nothing, the author said, who will go so tossing
Also, as this post said, even if the WIN7 system is successfully installed, the system must be rebooted. Otherwise, after the U disk is removed, the system cannot be started.
The author also gave a solution:
Is to use easybcd repair boot boot to the C drive, but did not give specific operations, for me this newcomer is more headaches. After searching for the right details for a while, he had to download the software and try it out.
Well, it's the official website. Here, enter the email and random name to download it. Even the mailbox is not verified. The basic functions of these personal versions of the official website are all free, and this temporary use is enough.
The software is still relatively easy to understand, as shown in the figure above, since it is a repair boot, see the repair column on the left, click in, there is a "recreate/repair boot file" on the right, because it is a virtual machine, big deal to come back, does not affect The current system, click, perform actions. OK, shut down. Remove the U disk in the system editor. After booting, enter the following three list of startup screens, the first enter into the smooth start, so that the system boot is repaired.
Then, in the easybcd, set the skip start menu, you do not have to enter alone. Remember to save the settings, you can still set back countdown when needed.
At this point, the system is installed.
Of course, there is a win7 activation problem, this can be activated directly by entering the activation code, find yourself online, I have not tried the software activation, you can also try.
The driver looks like it is not loaded, automatically matched;
The resolution is to adjust the screen size;
The network connection can be set directly to connect with the host. The virtual machine settings can be performed at any time.
The system is complete, but the convenience of the system also requires software assistance. Before all my work was passed on QQ. . . Also need to download a vmware tools installation, with the help of this toolkit, the operation will facilitate a lot, directly drag copy copy, mouse and keyboard seamlessly switch.
However, this is more difficult to do, comes with the download and installation features, because the network connection problem can not be downloaded, at least the latest version of the software matching vmware tools not, this is the latest version brought about before the problem, the corresponding tools is 10.0. 10 version, download can not, VPN can be downloaded to download, but the speed is very slow, and then download a little easy to break the net.
Then go to the official website to find the highest 10.0.09, but it is also based on the name do not know which to choose. . . Link in this
Lying down, good long links. . Nothing was discovered at the time of reproduction
Then search on the Internet, found a brother to the 10-12 version of the tools, then find his network disk, according to the corresponding download of different systems is, download the windows.iso.
This man's article link
Find his Baidu disk link, password 22c4, the page where the link is located must be turned off to turn off the ad blocking software. . .
There are many things inside, easy to leak, screenshots look at it, from the upload time point of view, it is still very new.
After downloading this ISO, it is loaded from the ISO set in the virtual machine, loaded, and then the virtual machine WIN7 has jumped out of the CD-ROM drive has a file, whether to run, install it.
In this way, you can directly drag and copy the host and virtual machine to each other, which is very convenient, and the mouse is seamlessly switched.
Fifth, the final software compatibilityMy professional computing software is a computing software several years ago. It must be used by genuine electronic dogs. Even if there is no cracked version, and the upgrade cost can be bought, it is always used. . .
After installation, you can, so that I can calculate and take a screenshot of a computer.
In fact, at the beginning, my X1 carbon's WIN10 64 bit can also be installed and used, but I can't use it for a few months. I can't do anything about it this time. I can only do it this way, but it gives me a chance to go. Touching a virtual machine that I’ve heard very early, this thing is still quite interesting
ConclusionProbably tossed for 2 days and learned a lot. An old saying, would like to toss value friends can feel happy in toss! Give gold coins, crabs
Which are the techniques of PCB manufacturing?
From 1903 to the present, from the perspective of the application and development of PCB assembly technology, it can be divided into three stages
â—Through-Hole Assembly Insertion Technology (THT) stage PCB
1. The role of metallized holes:
(1). Electrical interconnection---signal transmission
(2). Support Electronic Components---Pin size limits through hole size reduction
A. Lead rigidity
B. Requirements for automated plug-in
2. Ways to increase density
(1) Reduce the size of the device hole, but it is limited by the rigidity of the Electronic Components pin and the accuracy of the insertion, the hole diameter is ≥ 0.8mm
(2) Reduce line width/spacing: 0.3mm-0.2mm-0.15mm-0.1mm
(3) Increase the number of layers: single-sided-double-sided-4 layers-6 layers-8 layers-10 layers-12 layers-64 layers
1. The function of the via hole: it only serves as an electrical interconnection. The hole diameter can be as small as possible, and the hole can also be plugged.
2. The main way to increase density
â‘ . The size of the via hole decreases sharply: 0.8mm-0.5mm-0.4mm-0.3mm-0.25mm
â‘¡. The structure of the via has undergone essential changes:
a. The advantages of the buried blind via ( BVH PCB ) structure: increase the wiring density by more than 1/3, reduce the PCB size or reduce the number of layers, improve the reliability, improve the characteristic impedance control, and reduce the crosstalk, noise or distortion (due to line Short, small hole)
B. Hole in pad eliminates relay holes and connections
â‘¢Thinning: Double panel: 1.6mm-1.0mm-0.8mm-0.5mm
â‘£PCB flatness:
A. Concept: The warpage of the PCB board substrate and the coplanarity of the surface of the connection pad on the PCB board.
B. PCB warpage is the combined result of thermal and mechanical residual stress
C. Surface coating of connecting plate: HASL, electroless plating NI/AU, electroplating NI/AU...
CSP has begun to enter a rapid change in its development, promoting the continuous development of PCB technology, and the PCB industry will move towards the laser era and the nano era.
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