Detailed Explanation of 51 Single Chip Microcomputer Function, Function and Manufacturer's Single Pr

The gaming keyboard and mouse is a product category that is growing rapidly. This is due to the fact that there are many gaming keyboards and mice on the market.Gamers are getting used to the comfort of gaming keyboards and mice. These devices provide not just a more comfortable mechanical keyboard but also a sophisticated software for controlling their play sessions.The devices can be quickly bought on the market and can be easily integrated into players' workflows. But, how do gamers go about choosing the right device?The first thing that they should know is that there are numerous types of gaming keyboards and mice: mechanical ones, wireless ones (including those with battery backup), ergonomically designed ones and many more. How do you know which one is best for you? That's why we've put together this list: Gaming Keyboard& Mouse Comparison Table Gaming Keyboard& Mouse Review . Here we compare different types of game-related devices includingThe keyboard is an important device for a gamer. The key on the keyboard is used to control the game and provides input to the computer. A good gaming keyboard should have at least two keys with different functions, though three is optimal.It's no secret that a lot of people are spending more time on their smartphones and other devices. Even though this activity takes a toll on your body, it also makes you less productive at work. The problem is that you need to teach yourself how to play new games in order to stay competitive as a company employee.This is where keyboard gaming comes in. It's just as easy as playing with your phone, but you don't have to worry about losing track of the game you're playing while working because your phone will be saving all the information for you. Your smartphone even has voice control capabilities so nothing will distract you while working with the keyboard at hand and typing away!The gaming keyboard has made a huge impact on the gaming industry. It's not surprising that every household has one. But, there are also a lot of options available. If you think about it, most keyboards have at least 3 or 4 different types of keys with different functions and colors to choose from.Some of the readers have very specific demands, and when they are satisfied, they will gladly pay a lot for a game keyboard.This is an example of an article that was written by an AI writer and it covered the requirements of gaming keyboard. While it might be interesting to some readers, this article was written in bad English and most of the people will not be able to read it. This is also what happens when you use automated writing tools like Google Docs or Microsoft Word: you get a lot of content that is not readable even though it has been well-structured and well-written.With the rise of Artificial Intelligence, video gaming keyboards have become quite popular. However, the quality of the keyboards has been constantly declining and it has been a growing source of frustration to gamers.A gaming keyboard can be the difference between a good game and a great one. Many manufacturers choose to use expensive mechanical keyboards that are prone to mechanical faults, but they could have been made with less effort.The Key-O-Matic is an example of such keyboard, it has mechanical switches and is available in different styles: Wired, Wireless or USB.In the gaming industry, keyboard is a key part of the experience. It's not only for typing, but also for playing games.We should not think of these in-game keyboards as a replacement for the real ones. They are more like virtual ones that we can use on our computer desktops. We can use them to play games while browsing a web site or using other applications such as YouTube etc.We need to see the game from the user's point of view. Every gamer is different. Some prefer FPSs and some prefer MOBAs. Our job is to understand what type of gamer each person is, what makes their choice better and why they choose one or the other genre over others.

What are the functions of a computer mouse?There are at least two type of mice:mechanical mice - which detect movement with mechanical sensorsoptical mice - which detect movement be detecting motion in light reflect on the surface the mouse moves.There are also track balls which are similar to mice. They do not move but a ball is rotated in them, and again the movement is detected either mechanically or optically. I find track balls much easier to use (I use one made by Logitech)------how can i clean a computer mouse ball.?umm take it out and whipe it with a cloth or something. If it doesnt work youll prob need a new mouse. Get a wireless one they work better------Where can I find a computer mouse which is silent?I use a wireless mouse, and keyboard from Logitech. The mouse is quiet, but you can still hear the typing------What is the perfect (computer) mouse?Go for R.A.T. 9Comfortable.Affordable.Full of Fun------Why does a computer mouse hand get cold?Mouse Hand Warmer------My Computer mouse is very slow. Its a USB roller ball mouse. How can I speed it up?Flip it upside down and take the ball out. Then clean all the dust and stuff off the rollers inside it will work like brand new.------what is the full name of computer "MOUSE"?A computer hardware navigator------POLL: Do you have an optical or a old ball computer mouse?Which category does rollerball mouse fit into?------How can i turn off my computer if the mouse is frozen?hold the power button on the casing for a few seconds and the screen will show Windows is shutting down. you should buy a new optical mouse to solve this freezing problem.------Why left handed people use right hand when they use a computer mouse?Yes, I am the same as you, but I do a lot of things with my RH and I could not use a LH mouse if I tried------What is wrong with my computer mouse?sounds like a dodgy mouse. but check your settings first. Go to start>>control panel>> folder options>> general tab and see whether you have it set for double or single click------Something wrong with my computer mouse?we want extra education. is that this a corded mouse? is it on the spot? is it a rollerball circulate or optical? if it corded then the cord might have come unfastened, verify the mose is pushed into the lower back of the computing gadget completely. if cordless then that's probably to be an optical which desires batteries replaced each and every so in many circumstances (ni-Mh 3200mAh are best for top durable overall performance of roughly one to 2 weeks of 8 hours an afternoon use). if the mouse is a rollerball (it has somewhat ball that strikes once you slide the mouse) then that ball may well be grimy and can want cleansing, get a exhibit screen wipe (do no longer hardship with regard to the call) following the process the arrows on the mose backside carefully eliminate the ball. now use the exhibit screen wipe to wipe the mouse ball carefully. want i say until eventually now attempting any of the above the computing gadget ought to be became OFF! finally use tweezers to eliminate any fluff or different substance that could have have been given in to the mouse. Now if the mouse is an optical corded or no longer the lens might ought to be wiped sparkling with the cotton bud and the alcohol comparable technique gently moisten the bud then wipe the lens to bathe any greas and dirt from the lense. finally use a exhibit screen wipe to bathe the exterior of the mouse to eliminate any sticky fingerprints or different maks. this cleansing ought to be carried out routinly as quickly as each and each month or 2 to maintain your gadget in perfect working order. at the same time as your cleansing evaluate utilising a exhibit screen wipe to bathe your gadget keyboard and yet another couple to bathe the exhibit screen exhibit screen carefully with a view to no longer scratch the exhibit screen with any dirt debris that could have accrued. you additionally can use a pair of wipes to bathe the housing on your computing gadget in case you need to

What are the functions of a computer mouse?Your basic computer mouse has two buttons (three if your scroll wheel can be pressed down)Here's a basic explanation of what these buttons are for.Left Click:You use the left button to select objects within the operating system (double-clicking programs on the desktop, clicking links online, and so on).You can also drag the mouse with this button held down to draw a selection field on the desktop, allowing you to highlight multiple programs on the desktop at once. Scroll Wheel / Middle Click:You move the scroll wheel up or down to scroll along the contents of a window, document, or web page.If your mouse supports it, pressing down on the scroll wheel will allow you to quickly scroll by dragging the mouse up or down.If on a website, you can middle click on a link to open it in a new tab. Right Click:Right clicking will bring up a context menu with more options. On the Windows desktop, for example, right-clicking will bring up a menu listing options like "Personalization", "Display Settings", and an option to create a new folder or file.Some mice (or is it mouses?) will have additional buttons on the side of the mouse, like these...These two buttons can act as your forward and backward navigation buttons. Allowing you to go back to previous web pages without having to click the back button in your web browser, same for going forward------New computer mouse and keyboard will not work when hooked up but lights on both of them are on.?Are these a STANDARD keyboard and mouse, or after market setup plugged into USB? The STANDARD PS2 keyboard is recognized at the BIOS level, while a lot of the USB keyboards are not recognized until USB drivers are loaded. If it's a standard ps2 keyboard/mouse and it's not working then STREET is right... you will have to reset your bios. You may need to remove the CMOS battery and reset BIOS to defaults. Google on how to do it. ---- If the problem persisists try re-instaling OS If still not detecting there might be problem with your mother board seek pro-help------how do i use my computer mouse on a toshia laptop?you would have to get a mouse with a usb connector or use an old mouse with an end connector changing the mouse attachement to that of a usb------Other than your computer and mouse, what is the closest item to you?A calculator. Two of them, in fact. :|------Whats up with my computer mouse?? HELP!!!!!?if tis a wireless mouse then its the batteries if its a wired mouse then it might be time to buy a new one------If I get a cat, will it try to eat my computer mouse?Only if it's a computer cat... So as long as you stay away from the virtual pets, I would say your mouse is perfectly safe.------Do you use a computer mouse? And if you do what mouse would you recommend?Yes I do. I love my mouse and cannot stand touch or trackpads.Logitech M510. Excellent mouse. You don't need to overpay for a gaming mouse. Built well. Wireless with phenomenal battery life, tracks well, feels great in your hand and is not too small. Side buttons for forward/back are indispensable and you can download the Logi Options software and assign the buttons to do what you want. For instance, I have it so if I push the scroll wheel down it gives me task view and tilting wheel left/right adjusts master volume down/up.Many of the other suggestions here do the same thing but this costs $20 and I don't see you directing the question toward a gaming topic. It does not light up. If you need lights or extremely high DPI because you are a professional gamer perhaps look somewhere else.Amazon.com: Logitech M510 Wireless Computer Mouse - Comfortable Shape with USB Unifying Receiver, with Back/Forward Buttons and Side-to-Side Scrolling, Dark Gray: ElectronicsGet a decent mouse pad to track on also. This is $5 more than the cheap ones. Ignore the gimmick that it is a gaming mouse pad. If you are in need of a mouse pad that lights up that is an option as well. I actually ordered the thick version because I was dealing with an uneven surface occasionally.Amazon.com: SteelSeries QcK Gaming Surface - Medium Cloth - Best Selling Mouse Pad of All Time - Optimized For Gaming Sensors: Electronics.

USB peripherals cannot communicate with each other. They can only communicate with USB master devices with control bus capability. Until recently, only PCs have the ability to host devices. However, at present, many microcontrollers also have the function of embedded USB host device, which makes embedded applications adjacent to more common USB peripherals.USB flash drive is a widely used USB peripheral device. It has become a cheap medium for transmitting or storing a large amount of data. It is recorded that most devices can grow just because of it. For remote persistent data recording, you can collect it first, store it in flash drive, and then bring it back to the place convenient for analysis and processing.The flash drive can also be used to transmit high-speed time related data to the PC. PC is an excellent data analysis tool, but its real-time ability is limited. On the contrary, embedded applications are particularly suitable for real-time data acquisition, but the ability of data analysis is usually very weak. The embedded real-time data recorder can store data on the flash drive and then transmit the data to the PC for analysis. In this way, the advantages of both have been fully demonstrated.Application of embedded USB host deviceAt first, one of the primary missions of embedded design is to select microcontrollers. In order to use flash drive, the microcontroller must have the ability of embedded USB host device. If the micro controller has USB OTG (on the go) or USB dual role function, such as pic24fj256gb1 micro controller of microchip company, as shown in Figure 1, it can also support the function of embedded USB host device. USB peripherals, sometimes called USB device mode, can only be used as flash drives, etc., and cannot communicate with other USB peripherals.Secondly, the designer should be sure to have a complete development tool. At least a device programmer (if there is a debugger is the best) and a c-speaking compiler are needed, because the embedded USB host device and the criterion running in the microcontroller are often written in C rather than assembly.Finally, designers should also understand which software libraries are available, because the handshake operation when embedded devices find flash drives needs the support of USB device class, FAT32 file system and other libraries. It will take months to design and support the embedded USB host device from scratch, and a scheme composed of an authenticated peace stack can save quite a lot of time.In order to use flash drives, embedded devices also need a terminal driver criterion, hardware call line interface and file system interface of USB mass storage class devices. Generally, flash drives with 2GB or less storage space will use FAT16 file system, while flash drives with larger capacity will use FAT32 file system.

With the development of microelectronics technology, digital signal processing using field programmable gate array FPGA has developed rapidly. Because FPGA has the characteristics of field programmable and can realize ASIC, it is more and more favored by hardware circuit design engineers. This paper studies the implementation method of FIR digital low-pass filter hardware circuit based on FPGA. The internal circuit structure of the filter is transparent, the volume is reduced and the working efficiency is improved.The method of designing linear phase FIR filter by window function methodFrequency response H (EJ) of any digital filter All Its Fourier series expansion is:Fourier coefficient h (n) is actually the impulse response of digital filter. One possible way to obtain finite impulse response digital filter is to intercept the infinite series of equation (1) into finite series to approximate it, and the well-known Gibbs phenomenon makes the direct interception method unsatisfactory.The window function method uses the finite weighted sequence w (n) called window function to modify the Fourier coefficient of formal (2) to obtain the required finite impulse response sequence HD (n), namely:W (n) is a finite length sequence. When n > n-1 and N Here, we only take the low-pass filter when the impulse response is symmetrical, that is, H (n) = H (n-1-n) (n = 0, 1, 2,..., n-1) as an example. The frequency response function H (EJ) of the low-pass filter As shown in equation (4).Among them, Is the frequency normalized to the sampling frequency, C is the normalized cut-off frequency.The impulse response H (n) corresponding to equation (4) is obtained by using the inverse Fourier transform formula, as shown in equation (5).Hanning window is selected as the window function, and the function is shown in equation (6).2 hardware circuit design of sixteenth order FIR low-pass digital filterThe following takes a sixteenth order FIR low-pass filter as an example to illustrate the design method and process of hardware circuit.2.1 design index and parameter extraction2.1.1 design indexCut off frequency: 37.5khzType: low pass input data width: 8 bitsOrder: 16 order output data width: 16 bits2.1.2 parameter extractionThe frequency response function and Hanning window function of the low-pass filter introduced above are used for design. The calculated characteristic parameters of the linear phase 16th order FIR digital low-pass filter meeting the design index are as follows:2.2 unit circuit designFIR low-pass digital filter circuit is divided into data bit expansion, parallel serial converter, shift register bank, pre addition unit, intermediate processing unit, post-processing unit and control unit. Its composition block diagram is shown in Figure 1.2.2.1 data bit extensionThe input of FIR digital filter designed here is 8 bits wide. In order to prevent overflow and ensure the normal operation of the circuit, the symbol bit expansion method is adopted. After symbol bit expansion, the total input data width is 9 bits.2.2.2 parallel / serial converterThe parallel / serial converter is composed of 9 2-out-of-1 selectors and 9 d flip flops. Its structure is very simple. Its circuit structure will not be described here. Its working process is: the parallel / serial converter periodically collects 8-bit sample data at the sampling rate and outputs 1-bit data stream to the shift register of the later stage.2.2.3 shift register groupThe register group mainly completes the shift function.2.2.4 front adding unitThe main function of the preamble unit is to pre add the 1-bit serial data stream output by the shift register. It is composed of a 1-bit serial adder. XC4000 series chips have the following two characteristics:(1) Internal basic unit CLB (configurable logic module) It includes three function generators marked with F, G and h respectively. Each of the two first level function generators F and G can realize any function with 4 inputs. At the same time, they can also be combined with the H function generator to generate any function with 5 inputs. In addition, CLB also has the feature that the delay of CLB internal connection is less than that of external connection.(2) XC4000 series provides CArray logic to accelerate the carry channel of adders and counters. Using fast carry logic, adders and counters, it has extremely fast working speed when occupying the minimum number of CLBs. Moreover, the carry logic can be flexibly configured to realize counters and subtracters of any length.Therefore, from the aspects of improving chip utilization, wiring rate and reducing circuit delay, we must make full use of the characteristics of XC4000 series chips to make a special design for the 1-bit full adder in the circuit suitable for the characteristics of FPGA. The circuit in Figure 2 is the optimized 1-bit full adder circuit including fast carry logic adopted in this paper, in which fmap is function mapping, and specific circuits can be mapped To F, g or H function generator of CLB; CY4 is fast carry logic macro unit.2.2.5 intermediate processing unitIn FIR digital filter, the intermediate processing unit mainly realizes the functions of multiplication and accumulation of 1-bit serial output data from the pre adding unit. Here, the distributed algorithm based on ROM look-up table method is used to design the circuit of the intermediate processing unit.As mentioned earlier, this paper only considers the case that the impulse response is symmetrical, that is, the coefficients of the filter are symmetrical, so the number of independent coefficients should be equal to the order of 1 / 2. For the FIR filter of order 16, the number of independent coefficients is 8. These 8 independent coefficients are stored in 2 ROM based look-up tables according to the combinations shown in Table 1.2.2.6 post processing unitThe main function of the post-processing unit is to round the data and get the required data from the data stream. A 16 bit adder is required to complete the rounding function, and a 16 bit parallel D trigger is required to get the data.2.2.7 control unitThe control unit is mainly composed of counter and D flip-flop. Its control of the circuit mainly includes: global reset before the circuit starts to work, making work preparations; controlling the work of the input unit; providing some signals necessary for the normal work of the intermediate processing unit; and providing the output synchronization signal (outsyn) when the final output result is provided.2.3 circuit principle and function simulationThe hardware circuit of the 16th order FIR low-pass digital filter designed by xc4005epc84 of Xilinx company is adopted, and the circuit schematic diagram of the top layer is shown in Figure 3.Figure 3 is the upper layer diagram of FIR digital filter. See Table 2 and table 3 for input and output pins and hardware resource occupation respectively.In order to check whether the designed circuit can work continuously and correctly, 16 bit data (decimal system) are continuously input, which are 100101102103104105106107, - 101, - 102, - 103, - 104, - 105, - 106, - 107. Hardware simulation results of FIR digital filter (the first 16 outputs) As shown in Table 4, the software calculation results obtained by the program written according to literature [4] are also listed in Table 4.From the above data, it can be seen that compared with the hardware simulation results, the absolute value of the error is 1, so it can be considered that the hardware circuit of the filter works correctly.In addition, in order to verify whether the filter can work correctly when the edge value is input, the edge value test is also carried out. When the input data is 8 bits, the two edge values are 127 and - 128 respectively, corresponding to hexadecimal 7F and 80. Using these two groups of data as input, the output is also compared with the software results, which can prove that the circuit can also work correctly at this time.When the 16th order linear phase FIR digital low-pass filter designed in this paper is realized by xc4005epc84-2 chip, the system clock frequency of data processing is 36MHz, the sampling rate is 4MHz, and the maximum error between the calculation result and the software calculation result is 1. In practical use, the FIR filter can be easily modified according to different accuracy requirements to meet different index requirements In addition, based on the low-pass filter designed in this paper, the high pass or band-pass filter can be obtained by simply reorganizing the filter characteristic parameters. At the same time, the programmable characteristics of FPGA device can easily improve the circuit and further improve the circuit performance.

Wireless keyboard is not new for a long time. In recent years, because of win8 system, many manufacturers have begun to make gimmicks of touch peripherals. However, whether foreign brands or domestic brands, the actual operation experience of touch peripherals has not been much improved, and sometimes it is even less convenient than a touch screen. However, obviously, the manufacturer did not give up. BenQ launched an ultra-thin wireless keyboard. The highlight is that the digital keypad is made into a touch pad, which supports multi touch. In addition to win8 system, it also supports Android mobile phones and TV boxes.BenQ ke920 appearance details analysis:The packaging of ke920 wireless keyboard is simple and generous, maintaining the lavender visual effect commonly used by BenQ, and the touch use method of this keyboard is clearly shown in pictures at the back of the packaging.At first glance, the appearance of ke920 keyboard does not seem to have much characteristics, but if you look carefully, you will find that it adopts a layout similar to 96 key positions, but in fact, there are only 84 physical keys, and the traditional numeric keypad is still retained, but the whole numeric keypad is changed from physical keys to touch pad. The battery compartment just becomes a fulcrum to pad up the height of the keyboard, so that users can get better comfort.In addition, the internal accessories include a drive disc and a pair of No. 5 batteries, and the micro signal receiver of the keyboard is hidden in the battery compartment of the keyboard. Due to the use of No. 5 battery, the keyboard battery compartment is a little huge.2. Analyze the details of BenQ ke920 back to the topDetailed analysis of BenQ ke920 wireless keyboard:The digital keypad on the right has become a touch type. There are no physical keys on the surface. You can set the function of switching the mouse or touching the digital keys through the NumLock button next to the touch pad.If DIYer is a little qualified, I believe he will be very familiar with the X architecture used by BenQ's previous shell keyboard, and ke920 still adopts this well-known keyboard architecture. BenQ's x architecture has excellent hand feel, no loose key cap and strong rebound.In order to compress the volume, the general direction keys and some page up / down key areas are compressed, which can not only retain the use, but also reduce the keyboard width, which is more suitable for carrying..The switch of the wireless keyboard is located at the top of the keyboard. When the switch is turned on, the power indicator lights up blue, and the keyboard will automatically access the receiver signal. However, it is reminded that after plugging in and out the receiver again, the switch needs to be turned on again for normal use.Wireless storage deviceWireless receiver is sometimes the popular nano receiver. It is small and mini, and the keyboard provides a special storage position to prevent users from losing.3 actual test: win8 has good compatibility, and the compatibility of the box is generally back to the topActual test: win8 compatibility is good, and the box compatibility is generalKe920 keyboard is specially optimized for win8 gestures and supports the characteristics of Android HD box, so it will focus on these items in practical use.The use of ke920 in win8 system can be said to be "relaxed and pleasant". First, it is necessary to install the packaged drive CD, but it is a pity that the current drive intelligence is obtained in the CD, and the relevant download link is not found on BenQ's official website, which will be unfriendly to the mainstream ultrabooks commonly used at present; However, thanks to the optimization of touch devices by the system itself, various gesture operations can be completed very easily. For the touch panel with smooth metal texture is widely used in notebooks, the operation is not smooth, and the misoperation rate is also high. The touch surface with strong granular sense of ke920 can well avoid this problem. At the same time, because it can switch the function of digital area, it is also a very excellent choice as the external keyboard of notebooks.Two of the boxes used for the testMost of the boxes can recognize the pointer of the touch padA certain type of box does not support touch clickIn the access and use of HD box, it should be noted whether the box itself supports the access of USB interface. If the box adopts micro USB interface, it needs to use OTG cable for conversion. Officials say that boxes above Android 4.0 are compatible with this keyboard, but in the test, we randomly selected several brands of boxes, and the system version is basically above Android 4.0, but the compatibility of the test is not satisfactory. Among them, the small X box can only use the touch pointer function, and even the click function can not be used. The other box can't even use the mouse pointer. Finally, only a few boxes can be well compatible with pointer touch and keyboard functions, but they can't use their own physical keyboard keys during text input, which is somewhat frustrating.Pconline evaluation room summary:BenQ ke920 can be said to skillfully combine the function of touch pad in the keyboard, and does not sacrifice volume or key position. However, its touch pad is more suitable for PC at present. The compatibility in the current Android box is still worth observing. The main reason for this is that the box manufacturer is not enough to optimize the software, or even suspected of over simplification.

Caps lock key: caps lock key. English is the abbreviation of capital lock. Used to input more uppercase English characters. It is a looping key, and then press it again to return to lowercase. When it is started to uppercase, the caps lock indicator on the keyboard will be on. Note that the Chinese input method is invalid when it is in uppercase.ESC key: exit key. The abbreviation of escape in English means escape, exit, etc. in Chinese. In computer applications, the main function is to exit a program. For example, if we want to back out when playing a game, we just press this key.Tab key: table key. Maybe we use this key less. It is the abbreviation of table, which means table in Chinese. The application in computer mainly plays the role of equal distance movement in word processing software (such as word). For example, when we are processing a table, we don't need to use the space bar to move grid by grid. Just press this key to move equidistantly, so we call it the table key.Shift key: conversion key. English means "conversion". It is used to convert case or upper character keys, and can also work together with other keys. For example, to enter the @, press Shift 2 in English.CTRL key: control key. English is the abbreviation of control, and Chinese means control. It needs to be used with other keys or mouse. For example, when we use the mouse in windows, we can select multiple discontinuous objects.Alt key: optional key. English is alternative, which means optional. It needs to be used with other keys to achieve a certain operation purpose. For example, to warm up your computer, you can press Ctrl Alt Del to finish.Enter key: Enter key, which means "enter" in English. It is the most used key, so it is designed into a larger key on the keyboard, like the shape of a pistol, which is convenient to hit the key with your little finger. The main function is to execute a command, which is the function of line feed in word processing software.F1 F12 keys: function keys. Function in English means "function" in Chinese. In different software, it plays the role of corresponding functions defined for it, and can also work with other keys. For example, pressing F1 in common software is a help function.Print screen / sys RQ key: print screen key or print screen key. Is to capture the screen. After pressing, the display content of the current screen will be saved in the clipboard. You can print the content on the screen.Scroll lock key: screen scroll lock. You can lock the scroll bar. Scroll lock was very useful in the DOS period. Due to the display technology at that time, the screen can only display 80 characters wide and 25 lines long. When reading documents, it is very convenient to use this key to scroll the page. With the development of technology, the role of scroll lock is becoming smaller and smaller after entering the windows era, but it is still useful in Excel: if you use the page turning key (such as page up and page down) when scroll lock is turned off, the selected cell area will move accordingly; Conversely, if you want to scroll without changing the selected cells, just press scroll lock.Pause break key: pause key. Pause an action or program. For example, pause printing. You can abort the execution of some programs, especially DOS programs. For the self-test display of DOS interface before entering the operating system, press pause break to pause the information scrolling, and then press any key to continue. Press the windows Flag pause / break under windows to call out the system propertiesInsert key: insert key. It is mainly used to insert characters in text editing. It is a cycle key, and then press it again to change to the rewriting state.Delete key: same as del key, delete key. It mainly deletes selected files or contents in windows or text editing software.Home key: Home key. English home means home in Chinese, that is, the original position. In the text editing software, locate the starting position of the line. Use with Ctrl to navigate to the beginning of the article.End key: end key. English end means end and ending in Chinese. In text editing software, locate at the end of the line. Echo with the home key. Use with Ctrl to navigate to the end of the article.Pageup key: page up key. Page, meaning of page; Up means up. Page up the content in the software.Pagedown key: page down key. Page means page, down means down. Echo with the pageup key.Num lock key: press the digital (keypad) lock key. The first light in the upper right corner is on, indicating that the keypad can be used, and then press the light off, indicating that the keypad is not available.

Keyboard is an instruction and data input device used to operate equipment. It also refers to a group of function keys (such as typewriter and computer keyboard) arranged by the system to operate a machine or equipment. The keyboard is also a part of the keyboard instrument. It can also refer to the instrument using the keyboard, such as piano, digital piano or electronic piano. The keyboard is helpful to practice typing.ESC key - exit key. English abbreviation for escape. The main function is to exit a program. If we want to exit a program, just press this key. Generally, exit the full screen mode without closing the program;F1 F12 - function key. English function means "function" in Chinese. In different software, it plays the role of corresponding functions defined for it, and can also work with other keys. For example, pressing F1 in common software is a help function.Prtsc (PrintScreen) / sysrq (systemrequest) key - print screen key or print screen key. Is to capture the screen. After pressing, the display content of the current screen will be saved in the clipboard. You can print the content on the screen.Numlk (NumLock) - press the number (keypad) lock key. The first light in the upper right corner is on, indicating that the keypad can be used, and then press the light off, indicating that the keypad is not available. In a notebook, you usually press FN first and then numlk.Pausebreak key - pause key. Pause an action or program. For example, pause printing. You can abort the execution of some programs, especially DOS programs. Press pausebreak to pause the information scrolling of the self-test display on the DOS interface before entering the operating system, and then press any key to continue. Under windows, press the windows Flag pause / break to call out the system properties. Maybe different systems have different functions. It is possible to open the save file dialog box.Alt key - optional key. English is alternative, which means optional. It needs to be used with other keys to achieve a certain operation purpose. For example, to warm up your computer, you can press Ctrl Alt Del to finish.Role of ALT letter combinationsAlt u open account, ALT F open file menu, ALT v open view menu, ALT O open Favorites menu, ALT t open tools menu.Insert (insert) key - insert key. It is mainly used to insert characters in text editing. It is a cycle key, and then press it again to change to the rewriting state. (convert between overwrite and non overwrite)Del (delete key) - delete key. It mainly deletes selected files or contents in windows or text editing software.PgDn (pagedown key) - page down key.Shift key - conversion key. English means "conversion". It is used to convert case or upper character keys, and can also work together with other keys. For example, to enter the @, press Shift 2 in English.Shift key combinationShift delete permanent deletion, shift Tab reverse selection, shift Ctrl input method switching;Shift numbers: displays the punctuation marks above the numbers.End key -- end key. English end means end and ending in Chinese. In text editing software, locate at the end of the line. Echo with the home key. Use with Ctrl to navigate to the end of the articleCTRL key - control key. English is the abbreviation of control, and Chinese means control. It needs to be used with other keys or mouse. For example, when we use the mouse in windows, we can select multiple discontinuous objects.Home key - Home key. English home means home in Chinese, that is, the original position. In the text editing software, locate the starting position of the line. Use with Ctrl to navigate to the beginning of the article.The functions of those English word keys on the keyboardPrtscsysrq screen capture key, end displays the bottom of the current window, and home displays the top of the current window;NumLock numeric keypad switch, delete, pageup up, pagedown;Capslock letter case.Tab key - table key. Maybe we use this key less. It is the abbreviation of table, which means table in Chinese. The application in computer mainly plays the role of equal distance movement in word processing software (such as word). For example, when we are processing a table, we don't need to use the space bar to move grid by grid. Just press this key to move equidistantly, so we call it the table key.PgUp -- page up.Capslock key - capital letter lock key. English is the abbreviation of capital lock. Used to input more uppercase English characters. It is a looping key, and then press it again to return to lowercase. When it is started to uppercase, the capslock indicator on the keyboard will be on. Note that the Chinese input method is invalid when it is in uppercase.Enter - enter, which means "enter" in English. It is the most used key, so it is designed into a larger key on the keyboard, like the shape of a pistol, which is convenient to hit the key with your little finger. The main function is to execute a command, which is the function of line feed in word processing software.Windows key - the most basic function of win key is to open the "start" menu. It can be combined with many other keys and has a variety of functions.

According to the statistics of charging head network, at present, there are 9 iPhone models supporting USB PD fast charging, and apple began to form a strong camp on USB PD fast charging. However, apple only provides two of the standard 18W fast charging packages for iPhones. If many other iPhones need to obtain the fast charging function, they must buy extra, which provides a broad development space for third-party fast charging charger manufacturers.As a manufacturer specializing in the production of digital peripheral products such as chargers, mobile power supplies and power adapters, Shenzhen huakelong Electronics Co., Ltd. has launched five new USB PD fast charging chargers for the small and medium-sized power fast charging market, with power levels of 18W, 24W and 30W. At the same time, there are also two different interface specifications of usb-c port and 1a1c, It can fully meet the needs of users to upgrade original mobile phone accessories.It is worth mentioning that huacologne has rich development experience in digital display chargers, and has continued to develop a variety of products with digital display function in view of this differentiated market, so that some fever level users can understand the charging state of the equipment in real time and make up for the differentiated market.1、 Huacologne 18W 1a1c digital display fast charging charger hkl-usb57Huacologne 18W 1a1c digital display fast charging charger adopts PC flame retardant shell with size of 53 * 53 * 29mm. The shell surface is treated with bright baking paint, which is very smooth; The input is a folding pin, which supports 100-240V 50 / 60Hz 0.5A input. The output end is equipped with a usb-a interface and a usb-c interface, which support the maximum 18W fast charging output. It is compatible with USB PD, qc3.0, qc2.0 and other fast charging protocols, and can realize fast charging for mobile phones and tablets of Huawei, Xiaomi, Samsung and other brands.The charger output panel is equipped with an LED display screen, so that users can observe the charging voltage and current of the equipment in real time. In addition, the charger has eight safety protection, which can effectively filter dangerous current and voltage to ensure charging safety.2、 Huacologne 18W 1a1c digital display charger hkl-usb57sHuacologne 18W 1a1c digital display charger hkl-usb57s also adopts PC flame retardant shell, with round shape and folding pins for convenient storage. The output terminal is configured with 1a1c interface, and is equipped with an LED display screen, which can display charging voltage and current. Input: 100-240V 50 / 60Hz 0.5A; The usb-c interface supports pd3.0 fast charging output and has three voltage gears of 5V / 3a, 9V / 2a and 12V / 1.5A. The usb-c interface qc3.0 output supports three groups of standard voltages of 5V / 3a, 9V / 2a and 12V / 1.5A.It is worth mentioning that on the basis of PD and QC protocols, the charger also adds support for Huawei FCP, SCP, vooc, AFC and other protocols, with better compatibility, and meets the fast charging needs of mainstream brand mobile phones such as Huawei, Xiaomi, Samsung and oppo.3、 Huacologne 30W 1a1c fast charging charger hkl-usb67Huacologne 30W 1a1c fast charging charger hkl-usb67 adopts a round shell with a size of 58 * 57 * 26.5mm. Color and surface treatment process can be customized according to customer needs. The input is equipped with folding pins to support 100-240V global voltage. The usb-c interface at the output end supports USB PD fast charging, with a maximum power of 30W, and has five complete voltage gears of 5V / 3a, 9V / 2.6a, 12V / 2.5A, 15V / 2a and 20V / 1.5A, which can meet the charger requirements of different devices such as mobile phones, apples, mobile power supplies and low-power laptops.The usb-a interface supports the usb-a interface, supports the maximum 24W power, and is compatible with qc3.0, qc2.0, FCP, SCP, vooc, AFC and other fast charging protocols; Built in multiple protection functions, charging is more efficient and safer. At the same time, the output terminal is equipped with LED display screen, which can display the charging voltage and current in real time.4、 Huacologne 24W 1a1c charger hkl-usb56The hkl-usb56 charger of huacologne uses a white shell made of PC flame retardant material, and the body shell adopts a bright paint baking process. The side transition is round, and the whole is smooth and feels good; The body size is 53 * 53 * 29mm, small and mini, easy to carry out. The input pin specifications can be customized, and the output top surface is equipped with 1a1c two output interfaces.The dual ports of the charger support qc3.0 and PD fast charging protocols respectively, and the maximum output power of a single port is 24W; Dual port can output at the same time to meet the charger requirements of two devices; The charger uses the imported original PD chip and the official fast charging cable, which can greatly improve the charging speed.5、 Huacologne 18W USB PD fast charging charger hkl-usb66Huacologne 18W USB PD fast charging charger hkl-usb66 uses PC flame retardant material shell, and the color can be customized according to customer needs. The main body of the body adopts bright paint baking process, and the output top surface is matte. The side is transitional and round, and the whole is smooth and feels good. The product size is only 41 * 26 * 61mm, and the shape is small. Watermark can be put into the bag. The input pin specifications also support customization, and the top surface of the output is equipped with a usb-c interface.The maximum output power of the charger is 18W, which can automatically identify three groups of different voltages and currents: 5V / 3a, 9V / 2a and 12V / 1.5A. It is specially designed for iPhone 11 series; With the fast charging cable, it can charge about 50% of the iPhone XS in half an hour. In addition, it also supports the fast charging of iPad; It can intelligently identify voltage and current, and select appropriate charging power for the equipment without damaging the battery; It has multiple safety protection measures such as overvoltage protection, temperature protection and short circuit protection.At present, the above five new products launched by huacologne have passed the national CCC certification to facilitate e-commerce OEM / ODM and accelerate the listing of products on jd.com, tmall.com and other platforms.

What to do about milk in keyboard?If the spare keyboard is PS2 instead of USB, (Round plug in instead of flat), you may need to turn your computer off, plug in the keyboard, and then turn the computer back on. If the spare keyboard is USB, try plugging it into another USB port. When you first turn the computer on with the spare keyboard, can you turn the Num Lock off and on (Does the light go off and on when doing so?) If that works, the keyboard is working, but may need a driver in Windows. Most keyboards should be found and have basic functionality automatically. Some with special buttons will not work 100% until a driver is loaded------How to build a keyboardCould you prototype it by using some of the keys on a conventional keyboard and trying out the drivers you will need to write. That way all the electronics to scan the keypresses is in place & if you like it you can take it to the next level------parts of my keyboard aren't working! :(?it's either too much dust inside or you/someone spilled something on the keyboard------How can you clean off a white keyboard without hurting the computer?First, DISCONNECT THE KEYBOARD. No power to the system, remove the battery. Get a suction tool and clean the dust out from under the keys with a vacuum cleaner. Now moisten a cloth with your cleaning fluid, but not to the point where it's easy to squeeze drops from it. I would try rubbing alcohol, or fourmula 409. Wipe the frame around the keys. Consider using a Qtip swab on the skinny bars between the rows of keys if there are any. Let the whole thing air dry for an hour or two before using it again, just to make sure that any moisture has evaporated.------Past keyboard instrumentsFarfisa Organ Hohner Pianet Oberheim Synths Roland Synths Mini-Moog Synth Baldwin Acoustic Grand Kurzweil Digital Piano------Bit-paired keyboardA bit-paired keyboard is a keyboard where the layout of shifted keys corresponds to columns in the ASCII (1963) table, archetypally the Teletype Model 33 (1963) keyboard. This was later contrasted with a typewriter-paired keyboard, where the layout of shifted keys corresponds to electric typewriter layouts, notably the IBM Selectric (1961). The difference is most visible in the digits row (top row): compared with mechanical typewriters, bit-paired keyboards remove the _ character from 6 and shift the remaining &*() from 7890 to 6789, An important subtlety is that ASCII was based on mechanical typewriters, but electric typewriters became popular during the same period that ASCII was adopted, and made their own changes to layout. Thus differences between bit-paired and (electric) typewriter-paired keyboards are due to the differences of both of these from earlier mechanical typewriters. Bit-paired keyboards were common in the United States in the 1960s and 1970s, due to ease of manufacture, but died out in the late 1970s with office automation, due to the number of users already accustomed to (electric) typewriter layouts. Bit-paired keyboard layouts survive today only in the standard Japanese keyboard layout, which has all shifted values of digits in the bit-paired layout.------keyboard input stopped being accepted after loginI would start with any apps or utilities that might intercept USB devices. I once had a forgotten keyboard tool that was used to alter mapping of command and option keys that was not compatible with a system update and caused a similar problem. USB Overdrive? Keyboard macros? Virtual machine apps? Any similar things could be capturing the USB input from the keyboard and failing to pass to the OS.------What can i use to clean my laptop screen and keyboard?dont use any vinegar or alcohol not even mixed with water after a few times of using this your screen and any plastics can be destroyed!!! i recommend using organic vegetable cleaner... (spray bottle kind) you can find it at most stores and its cheaper than laptop cleaner and works twice as good, when you use it spray it on a nice towel wash some water thru that and ring it out then use that to clean any spot on the screen.. then dry it with the dry part of the towel. . anything (dust lint) the towel leaves behind use a micro fiber cleaning cloth to clean up (they only cost a dollar or two) (really fine quality).. plus it has nothing in it that can harm the screen... and for the keyboard use an air duster and if u have to use water put it on a qutip and dry it up if any water drops fall onto or in the keyboard.