I checked the Chinese data of lm3914 on the network for 2 hours and found no results. The most detailed one is the following sentence:
"
Lm3914 is a double 18-pin package; power supply voltage> = 3 ~ 20 V; adjustable output current = 2 ~ 30mA; reference voltage adjustable = 1.25 ~ 12.5 V; Voltage Divider resistance = 1 kb Ω; static current = 6mA; Voltage Divider precision = 0.5%, amplification gain = 3 ~ 8 dB.
The reference voltage source output
Original question: zoj 3774 http://acm.zju.edu.cn/onlinejudge/showProblem.do? Problemcode = 3774.
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This question is more complex, see this more detailed: http://blog.csdn.net/acdreamers/article/details/23039571
Conclusion:
Make full use of the Fast Power and reverse element.
Code:
#include View code
Question:
Given matrix;
Evaluate A ^ 1 + A ^ 2 + A ^ 3 +... A ^ K
Using quick power
Sum (6) = A ^ 1 + A ^ 2 + A ^ 3 + A ^ 3 * (A ^ 1 + A ^ 2 + A ^ 3 )...
So you can get a general item.
Sum (n)
If (n 1)
{
Sum (n) = sum (n-1) * A ^ n;
}
Else sum (n) = sum (n/2) + A (n/2) * sum (n/2 );
#include
#include
#include #include
#include
#define N 30typedef long long LL;using namespace std;int n,mod;struct matrix{ int a[N
Steps:
1, press the "Win+r" key combination to open the operation;
2, in the box input: control USERPASSWORDS2 Click OK open local account management;
3. In the "User account" attribute, cancel "to use this machine, the user must enter username and password (E)" Check, and then press "OK"
4, in the pop-up box input after the boot automatically login username and password, click OK, restart the computer can not use the local account log in.
The above is a small series of Win10 to can
In the iphone has a special power-on password setting option, the default state is off, that is not encrypted, the following step-by-step teaching you to complete the password settings:
1th Step, open the iphone and find the "Settings" icon, bash into:
2nd step, in the "Settings" option, find the "general" sub-item icon, click to enter;
The 3rd step, find the "Password lock" option, the default state is "off", click to enter the detailed settin
Introduction to the problem
My family has 2 ipad:1 is iPad1 generation, iOS5 system, 1 is the ipad air,ios7 system. The last time the ipad Air's iOS7 system opened the App Store, it sometimes went well, sometimes it was very serious and sometimes even hung out. It is now found that the ipad Air power consumption is much larger than iPad1 generation. I usually open the same game in two ipad, only need to click every 5 minutes, no other operation, the
1, in the phone we can turn off the turn off start 3G and turn off the itunes passbook update reading list.
2, we in the mobile Phone Notification Center to close today's view.
3, Settings-general--accessibility--turn on the reduction of sports Assistivetouch This feature many friends use but I don't think it's good.
4, Settings-general-background Application Refresh (shutdown).
5, set-automatic brightness adjustment (off) the normal brightness of one-third can be maintained (see a person li
10000007).
Sample Input
3 2 3 6 2
Sample Output
35
Source Bestcoder Round #29
The following:It's about asking you to ask for the first n items of the Fibonacci sequence.
Analysis:Sn=sn-1+fn,fn=fn-1+fn-2, the first n items are obtained by the fast power of the matrix, and the transfer matrix is: [Sn-1 fn-1 fn-2]* [...] = NBSP;[SN Fn F N-1], the middle one is the 3*3 matrix, this ... Not too good to write. It's easy for you to ask
Here's how it works, and the following are the same for other iphone versions and ipad devices.
We collected the questions of many netizens on the internet, summed up the main reasons for the iOS battery consumption, and how to solve their small trick:
1th, prohibit the location of Facebook and other programs, as well as background refresh service;
2nd, close your application in the background;
3rd, the disabled e-mail push service;
4th, the application software to cl
We open the Start menu and click the Netplwiz command in the bottom search box as shown in the following image.
Then we will search out the Netplwiz control account entry, then click it into "Netplwiz" and enter WIN10 account settings
After opening the user account, we click on the "to use this computer, the user must enter username and password" before the check out, and then click on the bottom of the "OK"
After we enter the powe
A Distributed Power Supply System is a large-capacity power supply system composed of several small-Capacity Power Supply Modules. It is a relatively small Power Supply Module Made of new power theory and technology, combined into a modular, intelligent high-
1 People for Wake Power detection
In short, it is to connect the computer motherboard 20 pin plug, with a wire (such as a thin wire, the specific people to play the imagination) a green line, a black line (there are 8), if the power supply fan turned on the power is good.
With a thin wire to the ATX plug 14 feet ps-on and the other end of the 3rd, 5, 7, 13, 15,
The server power supply is frequently used by many friends at work. When the server power supply fails, it is very important to choose a new server power supply, because the server power supply is the "motive force" behind the stable operation of the server ". In the past, we introduced and paid much attention to energ
The purpose of power management is to save energy. The basic energy-saving method is to make the system sleep in and out at the right time. for example, if you press the on/off button, the timer that monitors user activity times out, or the application call API can make the system sleep, if you press on/off again or other wake-up interruptions, the system will exit sleep. as a result, the power management m
Believe that a lot of computer enthusiasts for the knowledge of hardware, focus on the CPU, graphics, small to memory, hard drives and other factors affecting the performance of the host. They may be able to position a certain part of the performance specifications of catchy, but once go to the computer city or the electric Power channel "actual combat", but always because of some obscure accessories previously shelved and doors.
Especial
What to do if the laptop motherboard is out of power:
First step.
First, pin 14 and 15 short, and if the fan on the ATX power supply rotates, skip this step and look at the next one.
If the fan on the ATX power supply does not rotate, use a multimeter to cross the +5svb end of the Pin9 to measure the Pin15 voltage, and if there is a +5v voltage, then there is
Have you noticed the degree to which people are fascinated by mobile devices, especially smartphones? People are using smartphones to surf the Internet, check and write emails, play online games, or update social networks. All these activities, coupled with voice calls, consume battery energy, from power amplifiers (PA) to displays and kernel chipsets, which consume a lot of energy. In the end, the size of the lithium-ion battery can only be increased
In the 1960s S, the advent of the switching power supply gradually replaced the linear regulated power supply and SCR phase-controlled power supply. Over the past 40 years, the switch power supply technology has developed and changed rapidly, and has gone through three stages of development:
In the past, when purchasing computer accessories, the power supply was one of the most easily overlooked components. However, its various voltage output specifications, voltage stability, and protection in case of exceptions were very important, because the power required for all the accessories in the host must be supplied by the power supply, and the output lo
The distribution network line loss has a great harm. This paper introduces the technical measures for reducing losses and saving energy in the distribution system, and works with the management measures for reducing losses and saving energy in the distribution system. We believe that this can effectively reduce losses and save energy.
Overview
In China's existing power system, voltage-level power transmissi
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