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How to Select Parameters in Engineering

How to select parameters for the project?

General discrete components are mainly considered from the functional withstand voltage value, current withstand value and power consumption in the circuit, while integrated circuits are mainly considered from the aspects of interface resources, working voltage and compatibility.

1. The selected devices follow the normalization principle of the company and select as few types of materials as possible without affecting the function and reliability.

2. Materials with "preference level" of "a" in the material code library are preferred.

3. Devices with a growth and maturity life cycle are preferred.

4. Select the born and falling devices to go through the special approval process.

5. Carefully select devices whose life cycle is in decline, and it is forbidden to select devices that are out of production.

6. The power devices are preferably packaged with RJA with small thermal resistance and greater TJ junction temperature.

7. It is forbidden to select devices with package size less than 0402 (included).

8. The anti ESD capacity shall be at least 100V, and anti-static measures shall be designed.

9. MSL (humidity sensitivity level) of selected components shall not be greater than level 5 (inclusive).

10. The model of sealed vacuum packaging is preferred. If MSL (humidity sensitivity level) is greater than level 2 (included), sealed vacuum packaging must be used.

11. The models of coil packaging and pallet packaging are preferred. If it is a device with humidity sensitivity grade of grade II or above, it is required to be packaged with disc-shaped plastic braided tape, which must be able to withstand the high temperature of 125 .

12. For key devices, at least two brands of models can replace each other, and scheme level replacement should be considered for some.

13. The materials used shall meet the requirements of anti-static, flame retardant, anti rust, anti-oxidation and safety regulations.

General rules for chip selection

1. Sn63pb37 alloy is preferred for lead BGA Solder Balls, and SnPb alloy with high lead (lead content 85%) can also be selected. SnAgCu alloy is selected for lead-free BGA Solder ball.

2. For SMD and integrated circuit devices with leads, the metal materials of lead wires shall be copper, copper alloy, valvable alloy and 42 alloy. The surface alloy shall be coated evenly and the thickness shall meet the relevant standards (4 7.6) m) , the coating shall not contain metallic bismuth. Tin lead pin coating: SnPb; Lead free pin coating: preferably: matte Sn, SnAgCu, Ni / Au, Ni / Pd / Au; Sn coating: for pure Sn coating, the thickness of Sn coating is 7.6 M (electroplating process), or 2.5 M (melting process after plating), or 5.1 M (tin dipping process), or 0.5 M (electroless plating process); Barrier layer Ni: thickness 3 m SnCu coating: thickness of SnCu coating 3 m Ni / Pd coating: Pd coating thickness 0.075 m. The thickness of Ni coating is 3 M or more; Ni / Pd / Au coating: Ni thickness 3 m. PD thickness 0.075 m. Au thickness is 0.025 0.10 m

3. Carefully select Taiwan's CPU and power chip.

4. It is forbidden to select QFN encapsulated components. If only QFN encapsulated components can be selected, they must be reviewed. Any chip in QFN package can only be used after being approved by the leader at the general manager level.

5. For IC, chip packaging devices with pin spacing of at least 0.5mm are preferred.

6. The devices in chip packaging are preferred, and dip packaging devices are carefully selected.

7. Try not to use BGA packaged components, only when they have to be used. If BGA is selected, the BGA ball spacing must be greater than or equal to 0.8mm, preferably greater than or equal to 1.0mm. And try to use the model of BGA ball device with lead, and use the lead welding process.

8. It is forbidden to select CPUs that do not support online programming.

9. Try not to use Samsung chips.

Resistance selection rules

1. 10 series, 12 series, 15 series, 20 series, 30 series, 39 series, 51 series, 68 series and 82 series are preferred.

2. The chip resistors are preferably packaged in 0603 and 0805, and the packages below 0402 are prohibited.

3. The pin resistance is preferably 0.25W, 0.5W, 1W, 2W, 3W, 5W, 7W, 10W and 15W.

4. For the temperature drift of resistance, the temperature drift of gear J shall not exceed 500ppm / , that of gear f shall not exceed 100ppm / , and that of gear B shall not exceed 10ppm / .

5. It is forbidden to select metal film resistance of 1W or above, and metal film resistance of 750k or above.

6. The axis type of power resistance above 7W is prohibited.

7. Carefully select potentiometers. If it is unavoidable, select multi turn potentiometers, and use Bourns brand. The electronic potentiometer operates according to the chip selection specification.

8. The resistance brands are Yageo, MK and BEDIS.

Capacitor selection rules

selection rules of aluminum electrolytic capacitors

1. In general application, select standard type with service life of 1000hr 3000hr (for price consideration, select long-life type carefully), and select aluminum electrolytic capacitor with service life of 2000hr as far as possible.

2. For the withstand voltage of aluminum electrolytic capacitor, 10V for 3.3V system, 10V for 5V system, 25V for 12V system and 50V for 24V system; 100V is selected for systems above 48V.

3. The working temperature of aluminum electrolytic capacitor must be 105 .

4. For the capacitance value of aluminum electrolytic capacitor, series 10, 22 and 47 are preferred; Capacitance models such as 224, 105 and 475 (replaced by sheet multilayer ceramic capacitor or tantalum electrolytic capacitor) are prohibited under 25V.

5. For high voltage aluminum electrolytic capacitors, 400V shall be reserved. It is forbidden to select non-polar aluminum electrolytic capacitors.

6. The brand "SAMWHA" (Sanhe) is selected for ordinary aluminum electrolytic capacitors, and NCC (Black King Kong) or other Japanese famous brand aluminum electrolytic capacitors are selected for high-end aluminum electrolytic capacitors.

7. It is forbidden to select aluminum electrolytic capacitors with patches.

tantalum electrolytic capacitor selection rules

1. Tantalum electrolytic capacitors with withstand voltage above 35V are prohibited.

2. Pin type tantalum electrolytic capacitor is prohibited.

3. For the withstand voltage of tantalum electrolytic capacitor, 10V for 3.3V system, 16V for 5V system and 35V for 12V system, 10V, 16V and 35V are preferred, and 4V, 6.3V and 50V are disabled (replaced by aluminum electrolytic capacitor).

4. For the capacitance of tantalum electrolytic capacitor: preferably series 10, 22 and 47. Tantalum electrolytic capacitors with capacitance below 105 are prohibited (replaced by ceramic capacitors).

5. Brand of tantalum electrolytic capacitor: KEMET, AVX.

selection rules of flake multilayer ceramic capacitors

1. Careful selection of high Q ceramic capacitors; Only on RF circuits.

2. Chip multilayer ceramic capacitor packaging: 0603, 0805 preferred, 1206, 1210 carefully selected, and 1808 above prohibited.

3. Withstand voltage of sheet multilayer ceramic capacitor: preferably 25V, 50V and 100V; The withstand voltage of capacity above 106 (inclusive) shall not be greater than 25V.

4. Sheet multilayer ceramic capacitor capacity: preferably 10, 22, 33, 47 and 68 series.

5. The materials of sheet multilayer ceramic capacitors are preferably NPO, X7R and X5R, and others are prohibited.

6. Brands of chip multilayer ceramic capacitors: Taiyo, Murata, KEMET, temex (high Q ceramic capacitor).

1. It is forbidden to select such capacitors for new products (instead of sheet multilayer ceramic capacitors).

Relay selection rules

1. Brand selection: Panasonic, Omron, finder.

2. Do not use relay sockets.

Diode selection rules

1. Do not use glass encapsulated diodes.

2. The LED is preferably a pin model with a diameter of 5mm. The SMD LED is preferably a model with a welded frame, and the ESD / MSL level follows the above standards.

3. Rectifier diode: the model with the highest back voltage is preferred for the same current level. For example, 1N4007 is selected for 1a and in5408 is selected for 3a.

4. Schottky diode: the highest level of reserved back voltage of the same current level, such as 1N5819 reserved, 1N5817 forbidden, SS14 reserved and SS12 forbidden; M7,30bq060, s5g reserved.

5. Light emitting diodes preferably have edges and short legs; In order to maintain the consistency of the company's products, the models of red hair and green hair are preferred, and the models of white hair and white hair are carefully selected; If there are no special requirements, try not to use long feet and boundless.

6. The preferred brand of LED is "Yiguang".

7. The brand of transient suppression diode is ProTek and Semtech.

Selection rules of triode

1. 90129013 is selected for the triode of 901x series.

Connector selection rules

1. It is forbidden to select IC socket. If the use of IC socket cannot be avoided, the IC socket with round hole must be used.

2. The pin seat shall be in three-sided contact, and it is forbidden to use two-sided contact. Except for special requirements such as PC104.

3. The complete set of connectors shall be of the same brand, that is, the plugs and sockets shall be of the same brand.

Switch selection rules

1. No selection dial switch.

2. The power switch is preferably a boat switch.

Inductor selection rules

1. The brands of SMD inductors are "Sanli" and "Sumida".

CPU selection rules

1. If the selected CPU is different from the same series and models used by our company, it needs to be approved by the general manager of production. If the selected CPU is a new series of CPU that our company has never used, it must be decided by the company level leaders at a meeting.

2. Retain Atmega48, Atmega168, Atmega32 and ATmega128. The new products are prohibited from using attiny2313 and atmega88.

3. ATmega128 in QFN package is forbidden to select new products in the future.

4. ARM7 can only select the following types: lpc2138fbd64, lpc2292fbd144, str710fz2t6 and str711fr2t6.

5. In the future, new products will use ColdFire series to replace 68000 series.

Flash selection rules

1. Span and SST are preferred for parallel flash brands, and Samsung is prohibited.

2. Serial flash brand is preferred ATMEL. It is forbidden to reuse at45db081b-ri for new products.

SRAM selection rules

Brand preference: ISSI, cypress, micron, IDT, disable Samsung.

EEPROM selection rules

1. Parallel EEPROM is prohibited.

2. Serial EEPROM brands are preferred ATMEL and microchip.

3. 24lc65-i / SM is prohibited for new products.

Crystal and crystal oscillator selection rules

General technical requirements for crystal materials: at cut (fundamental frequency), 20pF load capacitance, temperature range - 20 70 (industrial temperature grade), manufacturing frequency deviation of 30ppm, temperature drift of 50ppm / , lead-free products.

Hosonic and Epson are preferred for crystal and crystal oscillator brands.

Power selection rules

1. For products with high reliability requirements, lambda and COSEL are preferred for power supply; For products with low reliability requirements, Lido Huafu, Xingyuan Fengtai and Mingwei can be selected.

2. When selecting lambda power supply, it is convenient for normalization. It is required that everyone uniformly select the model with JST connector.

3. Standard power supply shall be selected as far as possible for new products, and customized power supply is not recommended.


1. The isolated DC / DC power supply is preferably the product of TI company. When TI products cannot meet the requirements, C & D is preferred.

Connector selection rules

1. European connector brands are HARTING, Erni and EPT. The plugs and sockets used in the same set of products are required to use the same brand, and different brands are prohibited to be used together.

1. If it is not necessary to use external communication signals, RJ11 and rj12 connectors are prohibited.

2. For RJ45, it is preferred that the connecting shrapnel is round needle, with shielding shell and shrapnel in the shielding shell. The thickness of the gold plating layer of RJ45 connecting shrapnel shall not be less than 3uin.

3. It is forbidden to select RJ45 socket with lamp and transformer.

4. The brand of RJ series connector is pulse (FRE).

white terminal selection rules

1. Try not to use white terminals.

2. The brands of white terminals are preferably JST, AMP and Molex.

1. The brand of PCB board mounting screw wiring connector is Phoenix.

2. The brand of PCB board mounting screw wiring connector is preferably 2-position and 3-position wiring terminals. Connectors with other digits can be spliced with 2-position and 3-position wiring terminals.

3. 5.08mm spacing is preferred, and 5.00mm spacing is prohibited.

selection rules of other rectangular connectors

1. The preferred brands of other rectangular connectors are as follows: amp, MOLEX, SAMTEC, Hirose, wcon and nstech.

2. The thickness of gold plating layer of connector pin shall not be less than 3uin.

3. Universal connectors are preferred, and customized connectors are prohibited.

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How to Select Parameters in Engineering 1

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A laptop is an ideal tool for students who want to study at a university or for those who want to work on their laptops. This laptop is available in different sizes and shapes and you can choose one that suits your needs.Use your hands to move around, learn something new and get some exercise. Your hands will help you work more efficiently and use your brain more effectively. If you use your hands to move around, then you will also be working better at making sure you are doing what you are doing. This will make your life easier and keep you motivated to do the things you want to do.Most of the time people use their laptops for working from home, and that is why they use laptops as a work surface. However, it is always best to use laptops for casual tasks and in order to save energy and money, you need to make sure that you have enough space for your computer. Most of the time people use laptops for working from home and so it is good to check what they are using them for. They can also be used to monitor your progress. If you have been working in a team then it is good to check what they are using their laptops for.How does office computer keyboard work?Cards are important to keep in our homes and offices. Computers can be used to connect to computers, run games, use phones, listen to music, write code, etc. Computers can also be used to make money by producing high quality audio and video files. Computer keyboards can also be used to carry out various other tasks such as printing documents, send email, do things like type business reports, and much more. A computer keyboard can also be used to change the color of a piece of paper or change the font of a text file.There are two types of computer keyboard. One is used by employees who work in the same position and another is used by those who work in a different position. Office computer keyboard works by providing an interface to other computers, making it easier to use and to save files. It also allows users to enter commands into their email or create contact lists, write business notes and edit documents. Office computer keyboard can also be used for different purposes. For example, it can help with web search, input emails and make better connections.In offices, the most important part of a person's day is to take notes and write notes. One of the best ways to make notes is to have them memorized by someone who knows their name. In order to be able to remember what they are writing, you need to know what they are trying to say. A good example of this is using an email address book and checking email regularly. If you can read through your notes then you will know what they are trying to say. With an email address book, you can be sure that the person who wrote the note understands what they are trying to say.What is the cost for office computer keyboard?Office computer keyboard is an inexpensive and useful tool for personal computers. It is one of the most used tools in personal computers and it can be used to make email and web surfing easy. It is also very affordable and has many other uses. There are many types of office computer keyboards available in the market, so there are many options available. There are a lot of options available, so it is best to check what you are looking for.It is common knowledge that there are many different types of computers and each one has its own set of needs. It is important to choose the right type of computer and what type of computer you are using. When choosing the right type of computer you need to check if it is appropriate for your needs. If it is not, then you need to get an answer from a different computer company.All you need to do is input the name of the computer and make sure that the user understands the name of the computer. This will save you time when typing in a foreign language. You can also use your keyboard to edit text and add formatting. If you are using your keyboard to write notes or something else, then it is very important to have a proper understanding of the basics of how the keyboard works. A good writer will know how to type quickly and efficiently.It is difficult to decide what type of computer keyboard to buy, and it is hard to know what type of computer keyboard to buy. There are lots of good laptops that can be used by different types of people. Most of the computers that we use have built-in memory and other functions that can be used by other computers. A good laptop will work with any computer you have in your home or office. It will also work with any external monitor, laptop, phone, tablet, etc. The only problem is that there are many options available.
How to Change Keyboard Layout Via Command Line Cmd.exe on Windows XP/7?
How to Change Keyboard Layout Via Command Line Cmd.exe on Windows XP/7?
How to change keyboard layout via command line cmd.exe on Windows XP/7?"Windows 8 brings a new International PowerShell module. Unfortunately it does not seem like this can be backported or has any Windows 7 alternative"You could try this (example).. this enables only the selected keyboard layouts and clears the others.------Windows 2008 R2 Domain users can't change keyboard layoutLanguages also must be available locally------How do I get current keyboard layout?With GNOME D-Bus you can do it like this:------How to disable CtrlShift keyboard layout switch (for the same input language) in Windows?It has moved again in Windows 8.1 and Windows 10. From the desktop:There you have (limited) options to change or disable the hotkeys for switching input language or keyboard layout------Mac keyboard layout incorrect when using Windows 7 and VMWare FusionI have a French keyboard and had to create the proper keyboard layout "from scratch" (well I took the nearest working keyboard layout and modified it to behave like it does under Mac OS X, including dead keys and option/shiftoption combos). To that end I used the official keyboard layout creator from Microsoft------Why is the keyboard layout Q-W-E-R-T-Y and not simply A-B-C-D-E-F?I think that they were placed in comfort and accessibility for the fingers that use the letters the most or whatever. Just a guess I do not actually know------Icelandic keyboard layoutThe Icelandic keyboard layout is a national functional keyboard layout described in ST 125, used to write the Icelandic language on computers and typewriters. It is QWERTY-based and features some influences from the continental Nordic layouts. It supports the language's many special letters, some of which it shares with the other Nordic languages: /, /, / and / (/ also occurs in Norwegian, Danish and Faroese, / in Faroese, and / in Swedish, Finnish and Estonian.) These are all entered by pressing dedicated keys . /, /, /, /, /, and / are entered by first pressing dead key located to the right of and then the corresponding key.------How do I temporary change my keyboard layout on Debian? (no X)Try:From a terminal, it does not make sense to run this over ssh as the keyboard you use over ssh is the local one and the ssh client sends the keys after they have already been interpreted according to your local keymap. And it wo not even work if you try.You can find all the available console keymaps in /usr/share/kbd/keymaps------Thai Pattachote keyboard layoutPattachote keyboard is a Thai keyboard layout invented by Sarit Pattachote, because Sarit's research suggests that the Kedmanee layout uses the right hand more than the left hand, and the right little finger is used heavily. Thus, he invented the Pattachote keyboard layout. Research by The National Research Council of Thailand suggests that the Pattachote system can be typed faster than the Kedmanee layout, but the Kedmanee layout has been in use longer and is more popular.------Change main keyboard layout in OS XTry the option Use the same one in all documents and with a keyboard shortcut you can easily switch between different input methods, for example, Cmd Space------How to disable CtrlShift keyboard layout switch (for the same input language) in Windows 10?More recent versions of Windows 10 no longer have the Regional & Language Settings dialog, and the Language Bar Options have been moved to the Advanced Keyboard Settings page.Now just search for "Language bar" from the Windows search tool and you will get to an "Advanced keyboard settings" page, then click on "Language bar options" and there you are------Hindi traditional or inscript keyboard layout not availableWith Indian group and Default layout variant you can type 4 different gliphs by 1 phisycal button plus 2 key modifiers right Alt and any Shift. So top-leftmost button near Esc () example:This Indian - Default layout mostly the same as InScript but with some differences. For example the button just left from backspace let you type this 4 gliphs: ; no more and =. Use R-Alt and Shift key modifiers to find out all differences by your own.I do not know the real name of this InScript clone layout.OS: Kubuntu 18.04------What do you think is the best keyboard layout out there?Are they not all the same? What is a "qwerty" keyboard? is that the top six letters?
Best Keyboard for Office Computers
Best Keyboard for Office Computers
The introduction of office computer keyboardThe introduction of new computer keyboards has been characterized by change in the way we communicate. We are using a mouse and keyboard to present our ideas now, but computers are coming with keyboards and touch screens.Tips for office computer keyboardEvery office has a computer. It helps us to maintain a productive work environment and at the same time, it is also used as the way for communication between people. In this article, I will talk about some tips for making your computer keyboard more productive.Auto-completion of letters and word selection can be very useful when you want to pass typing tests or just dont know what to type in certain cases.How to use office computer keyboard?The computer keyboard is a must in the office. It is used to generate reports, save drafts, send e-mail. You can use it for typing text and also editing screenshots and videos.The specifications of office computer keyboardMany people are using the keyboard on their office computer. The common keyboard is different from the one used in a home office or an industrial setting. While keys of a home office keyboard have different shapes and sizes, the keys of an industrial keyboard are much bigger and have more angles than those used in a standard home keyboard.The product instructions of office computer keyboardDespite their simplicity, the instructions of an office computer keyboard can be confusing and complex. The most common problems with the instructions are:The application of office computer keyboardThis section will discuss the use of computer keyboard to improve the user experience. It will show you how to make the most out of your computer keyboard and using it efficiently.Section topic: The application of social mediaIntroduction: This section covers different social networks and how to use them for effective marketing communication.Text markup is a cornerstone of any good marketing communication. This section will teach you how to properly specify text so that it is easy for the reader to understand what you are trying to say, even though he or she may not be able to see your content in its entirety.
How Do I Clean a Raised-tile Keyboard?
How Do I Clean a Raised-tile Keyboard?
How do I clean a raised-tile keyboard?You would have to have the laptop disassembled. Even on standard laptop keyboards, using compressed air or long, thin objects (toothpicks, paperclips, etc.) does not always work and they need to be removed to be properly cleaned. I have an HP laptop with a standard keyboard and I've had to take it apart in order to get the keyboard out to clean it. So yah, like I said, have it disassembled to get the keyboard cleaned out for yours------Sticky juice in my keyboard, how can i clean it please?You can remove all the keys (Be shure to put them back on the correct place again! use a marker or something to mark the space underneath the keys) and clean the keyboard and the underside of the keys. To remove them, it usually enought to use a knife or a small screwdriver and pry them off CAREFULLY! (you are warned. Do not blame me if you break something) To put them back, just align them properly and press them firmly onto the keyboard.------Gauntlet (keyboard)Gauntlet is a wireless glove that can be used as a computer keyboard input device.> The glove was invented under a project called G.A.U.N.T.L.E.T. (Generally Accessible Universal Nomadic Tactile Low-power Electronic Typist), and it is still in the beta phase. In addition to being a computer input device, Gauntlet can also be used as an input device for smartphones and other portable devices.------Keyboard & Mouse Stopped Working Help!?check the driver software and if you do not have any go on another computer go on the website for the manufacture and you u should be able to find the drivers. maybe ur computer does not have enough power you might have other usb devices in the the computer which wont have enough power to make a connection to make the keyboard and mosue to work... goood luck------Keyboard bassKeyboard bass (shortened to key bass and sometimes referred as a synth bass) is the use of a smaller, low-pitched keyboard with fewer notes than a regular keyboard or pedal keyboard to substitute for the deep notes of a bass guitar or double bass in music------Keyboard Mapping Error or Something ( I don't think you can solve it)?unplug the keyboard, use some compressed air to blow out the port the place you plug the keyboard in at, and the port on you keyboard. it would basically be crammed with airborne dirt and dirt and is not any longer connecting anymore. If that would not artwork, open your tower and blow each and all of the airborne dirt and dirt out of there. I had an identical venture with my ethernet port, the venture grow to be too plenty airborne dirt and dirt------Works for KeyboardG 21: Sinfonia for keyboard in E-flat major G 22: Keyboard Sonata in E-flat major G 23: 6 Keyboard Sonatas from Trios G 143-148 G 24: 6 Keyboard Sonatas from Trios G 95-100------How to enable keyboard when yoga pad 2 is folded as a tablet?You must disable the HID Sensor collection under Device Manager --> Sensors for this to work. I am not sure exactly what this device controls but so far I've found that it does control the keyboard on/off when in tablet mode. So no, this is not hardware based------Pressing a key on the keyboard makes the computer say something?i think of you observed the random guy turning on his computing gadget that became unique in sleep mode no longer shutdown mode. it rather is once you may turn on the computing gadget with the keyboard. you may set the choice to instruct on the computing gadget from sleep mode interior the BIOS. frequently its interior the capacity techniques interior the BIOS. i will set the computing gadget to instruct on with the aid of pressing any key or particular keys based how I configured it------How can i clean my Macbook keyboard?on a macbook you should be able to remove the keyboard. one you have the key board off une an air duster(compressed air in a can) to spray down through the keys. this will clean all through the keys ad everywhere. If you have trouble with a key the keys can easily be removed by pulling up on the top of the key. pull up and toward yourself. then you can clean anything you are unable to get with the airduster
Problem with Hooking Up Wireless Keyboard.?
Problem with Hooking Up Wireless Keyboard.?
Problem with hooking up wireless keyboard.?First off all try resetting your computer. That may help, also on the receiver for the keyboard may have a connect button on it push it and then look on the back of the keyboard it may too have a connect button ( depending on the model you may need a pen to push the button.) . Finally try a new set of batteries as that could also be your problem If all else fails Logitech has pretty decent customer support from experience------Keyboard layoutsThe PC keyboard changed over the years, often at the launch of new IBM PC versions. Common additions to the standard layouts include additional power management keys, volume controls, media player controls, and miscellaneous user-configurable shortcuts for email client, World Wide Web browser, etc. The IBM PC layout, particularly the Model M, has been extremely influential, and today most keyboards use some variant of it. This has caused problems for applications developed with alternative layouts, which require keys that are in awkward positions on the Model M layout - often requiring the pinkie to operate - and thus require remapping for comfortable use. One notable example is the escape key, used by the vi editor: on the ADM-3A terminal this was located where the Tab key is on the IBM PC, but on the IBM PC the Escape key is in the corner; this is typically solved by remapping Caps Lock to Escape. Another example is the Emacs editor, which makes extensive use of modifier keys, and uses the Control key more than the meta key (IBM PC instead has the Alt key) - these date to the Knight keyboard, which had the Control key on the inside of the Meta key, opposite to the Model M, where it is on the outside of the Alt key; and to the space-cadet keyboard, where the four bucky bit keys (Control, Meta, Super, Hyper) are in a row, allowing easy chording to press several, unlike on the Model M layout. This results in the "Emacs pinky" problem.------HELP MY COMPUTEr's keyboarD IS POSsessed.?That hurts my eyes reading it. For waterdamage on my cellphone I submerged it in instant rice and it started to work again. I do not suppose that would work with a keyboard. put the keyboard over a heat-vent for a good half hour then try again.------some keyboard keys not working properlyHolding down the right side Alt Gr plus Right side Ctrl key plus Windows key got the keyboard working again for me when text/number keys were not functioning at the login screen------Have to press down hard for keys on keyboard to work? [duplicate]The link provided in the comment has good advice, but not everyone can take their Apple gear to a professional this is especially true if you live in a country that does not have an Apple Store or do not live in a larger city. So, if you can not get your laptop to a professional, then you will have to take care of the keyboard yourself until you can. Depending on what was in the water and how much of it was spilled and how long before cleaning under the keys took place, you may have a corrosion problem where the residue left behind after the liquid evaporated is gunking things up.------spilled soda on my keyboard.?Leave your laptop open. Turn it upside down and let it dry out for a day or two. DO NOT spray Windex or any other cleaner directly onto the keyboard. Spray a soft cloth and wipe the keys and inbetween the keys. If it still is not working right, you will probably have to send it back to the manufacturer. Check to see if it's covered under a warranty------A Question about the Keyboard of My Computer(Please Read and Help)?take the keyboard apart and clean the plastic rug with alcohole untill all of the brown stuff is white again------samsung tab 3 cannot retrieve keyboardI discovered that you have to touch the bit that actually says default keyboard not the greyed out button below. So Settings, language and input. Tap the header default and then slide the use onscreen keyboard button to turn the keyboard back on.
My Laptop Computer Keyboard Got Wet and Not It Does Not Work. Any Info Would Greatly Be Appreciated?
My Laptop Computer Keyboard Got Wet and Not It Does Not Work. Any Info Would Greatly Be Appreciated?
My laptop computer keyboard got wet and not it does not work. Any info would greatly be appreciated?water damage. it might work after a few days but do not cross your fingers. you will have to buy a usb keyboard.------What is wrong with my computer / keyboard?Computers are not designed to make use of a couple of keyboards immediately. There might have to be separate drivers and operational methods to run them separately. But the computer has surely changed the manufacturing unit keypad with the wi-fi mannequin, however the hardware remains to be energetic and sending indications. The cause the buttons are flawed is on account that they are being processed by means of the brand new keyboard drivers. I am now not certain if this will also be remedied. I do not comprehend why you require a wi-fi keyboard on a computer laptop.------How can I clean out the dirt in my computer keyboard?put the keyboard or laptop in the dish everytime.------How do you Vacuum a Computer Keyboard?You could use the blower function in a vaccum cleaner to blow off air in between the keyboard vents, works better the using vaccum function. If the vaccum cleaner is powerfull try first at a distance pointing to remove dust------What is the cheapest mechanical computer keyboard that I can get?I would suggest mine, which is the Thermaltake Tt e SPORTS Poseidon Z RGB it's a little less than $100 and I've had it for over a year now and it's holding up exceptionally well!------Has anyone considered including the peso sign on a standard computer keyboard?Its because people who makes keyboards sticks on the universal one, which is the one with no peso sign in it. I dont really think its a problem since like most people they would just use PhP. "Due to the lack of font support, the symbol is often substituted with a simple P, a P with one horizontal line instead of two"------How did millennial usually learn to type on computer keyboard?My elementary school tried to teach us. It did not work. They put those boxes over the keyboards and told us to play with the program that would teach us to type. The only way that I learned to type, was playing videogames. Once you know where the keys are, you learn your own way of typing quickly. Some type like you are supposed to, others do not . I can still beat most of my friends from elementary school at typing. You need to practice, practice, practice. Only way to learn to type fast is to practice.How did millennial usually learn to type on computer keyboard?------Why would my computer keyboard stop working?The purple thing is a PS2 connector. In my job I provide support for our computer users. I have encountered this problem before. It is much easier and faster to buy a keyboard with a USB connection rather than troubleshooting the problem with the PS2 port------how do you fix a computer keyboard that won't press certain buttons?Replace it. The last time I bought a new keyboard, it cost five bucks. A serviceman can not even take the back off for five dollars------How do you clean the dust inside my computer keyboard?If you do not have a vacuum cleaner, turn the keyboard upside down and tap the underside------How do I configure my computer keyboard?You are in NumLock mode. Full-size keyboards have a separate Number keypad. To save space on laptops, those keys are mapped into a block of keys on the alpha keypad. If you look carefully, you will see the numbers on the keys, possibly on the bottom edge, in addition to the letters. On a full keyboard, the alternative to numbers on the numeric keypad was the arrows and positioning keys (Home, End, Page Up, Page Down). It's kind of obsolete now, and really has been for some time, but it's still around. Press your Numlock key to fix the situation. Hope that helps.------My sticky computer keyboard and no money, what to do ?A new keyboard costs usally around $5 - $20 dollars. Just get a inexpensive one because they are all the sameAre the handicaps of Sen McCain the reason he can not use a computer keyboard?McCain survived 72 years without needing a computer. As President he would have plenty of people around him to help him with whatever he needed to use it for. I am sure he's very capable(at least mentally) to use modern new fangled technology. When you see someone like Stephen Hawking able to communicate via technology, He would not need to use a keyboard, I am sure they could set him up with whatever help he would need to do whatever he might have to do
Should I Buy a New Keyboard for My Laptop?
Should I Buy a New Keyboard for My Laptop?
Should I buy a new keyboard for my laptop?I would replace the keyboard. They are not very expensive. From 14 to 25 bucks. I just replaced one and it was one with the numbers pad. It only cost 24 bucks.------How can I clean under the keyboard of my laptop?you can take out the keyboard pretty easy. It just comes out with a screw or two depending on the laptop. Look it up on google. I recommend cleaning it up good under the keyboard. use a can of compressed air.------How to clean inside laptop keyboard? (:?First thing laptop keyboard is a very soft thing that should be handled with care. So as my advice, i have 3 techniques for this which i use, choose your best from below [all are safe]. 1] take the laptop in hand place it safely fully unfold the top display panel, take a vaccum cleaner put it in air blow mode, then blow the air on the keyboard keeping the laptop upside down. 2] buy a cleaner brush that is used to dust off the computer and small gaps, and brush of the dust between the keyboard gaps. 3] use your mouth and blow out the dust having the laptop half turned facing you horizontally and then use a cloth to wipe out the dust gently.------wireless keyboard stopped working! need some answers:(?Make sure the USB connection that is used for your wireless keyboard is inserted correctly and theres no problems with it. You could also try sticking it into another USB port. If that does not work, try to update any software linked to the keyboard. Right click 'My Computer' go to properties -> Hardware tab -> Device manager -> Keyboards Scan for hardware changes or Update driver or Uninstall and reinstall good luck!------Sharing a Bluetooth Keyboard and Mouse sequentially between two MacsAs long as both computers are on the same network you may want to consider a software solution like teleport for the keyboard and mouse. You will still need some kind of switch for the display------My computer keyboard is not typing anything?Desktop: Check the BIOS to peer whether it is registering within the pc. Check to peer in case your drivers are up-to-date in Device Manager If you've got upgraded your Computer to sixty four-bit then the keyboard is not sixty four-bit suitable you are going to desire a new one. assess to peer if any lighting at the keyboard are operating or check out urgent the NUM LOCK key whilst you flip your pc on. Laptop: once more Check the drivers are up-to-date and you've got now not upgraded to sixty four-bit as this may increasingly make your keyboard now not paintings if it is not suitable. assess the BIOS too. If you are not able to discover what is incorrect you then must open up procedure repair and repair your pc to while it was once woking. And if i would possibly ask. How do you get onto your pc in case your keyboard does not paintings? The Login display, do you've got a password?.------Disabling laptop's internal keyboard in windows 10This does not disable the keyboard, but it's an alternative to the whole "pick wrong driver to make keyboard stop working".Some drivers made keyboard still work, others froze my system, today I found out that the Cherry gmbH USB Keyboard stops the keyboard from working and doesnt mess up my system------Can you remove and replace keys on a Logitech K310 Keyboard?The Logitech K310 is a washable keyboard, you may be able to clean it without removing the keys. From Logitech's Support Article:Your keyboard is hand-washable. Follow the steps below to clean the keyboard without damaging it:WARNING: Do not plug a wet cable into your computer.------macbook pro out of warranty, two keys not working in built in keyboard. Options?If you take it to the Apple Store as VxJasonxV mentioned, they normally charge a flat fee to repair it off-site, regardless of what is wrong with it. They will repair anything that's broken for that one off charge. I think it was something around 280 (plus tax) for a Macbook, Pro may be a bit more. So if the keyboard is the only thing broken, I would definitely go the DIY route
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