Super rookie call for help, help, god for help

At this price, you can accompany a good LCD case no matter how you go

Nonsense....It's really...Ugh

The highest processor can be considered Q6600

Motherboard to P35.

1G of RAM is enough, and 2GB is a bit tight on your budget.

Consider a 400 yuan for a single display.

1. This circuit is a typical instrument amplification circuit.

The instrument built by yourself with the op amp is used as a large circuit (as you see above), which has the advantage of flexible circuit and low cost; The disadvantage is that the op amp parameters should be as symmetrical as possible.

There is also an instrumentation amplifier (AD623), which integrates this large circuit into it, and its gain fiber can be adjusted according to a resistor, and the relationship between the specific resistance and gain will be given in the general specifications. The advantages of this circuit: simple circuit design, strong anti-interference ability; Cons:

**Generally more expensive.

2. About the calculation of the above circuit:

3. About the role of R7, R8, RP:

In the instrumentation amplifier circuit, because it is a differential input of the stove vertical, it needs to be zeroed out, that is, a reference voltage needs to be given, and this reference voltage is accumulated into the output as an offset. For example, the AD623 integrated instrumentation amplifier has a discipline REF, and the output can be adjusted by external reference voltage.

The R7, R8, and Rp in the figure above should also have this effect, where Rp should be much smaller than R7, R8 to ensure that the gain of the amplification circuit is not affected much, but the adjustable range is not so wide.

In fact, there is also a way to adjust the zero point, that is, without using R7, R8, RP, directly let R6 ground change to R6 followed by a reference voltage (that is, the zeroing network of the integrated instrumentation amplifier).

4. Having said so much, my mouth is thirsty, hurry up.

First, the film is a must, because the average Chinese are more subtle, after the film from the outside can not see the inside, if it is those high-grade films, it is said that it can also play a role in anti-ultraviolet, anti-dazzle or something, the specific function I can't say well, anyway, the most inferior film is also to have. There is also the installation of floor glue, which is to install a coat on the floor of your car to prevent staining the fluffy carpet underground, and it can also be replaced if it is broken. Floor pads and seat covers are a must.

As for the ground protection, I personally think it is dispensable, this thing actually has a layer of protection when the vehicle leaves the factory, this thing can play a role in anti-corrosion and rust-proof, as for other functions, it is not big. If your engine doesn't have an oil pan protection floor, this is really useful, and a small bump will help you protect the engine oil pan well. It's best not to leave the rest of the original car stuff untouched, because now the vehicle is more fully equipped.

Second, the GPS you mentioned also has some role, mainly in long-distance travel, but now the GPS on the market is dazzling or it is better to choose a good brand, because the GPS map needs to be upgraded frequently, if you buy those small manufacturers, you may still point you to the wrong way, or simply can't use it.

Third, insurance, you can choose according to your own situation, I am not very clear about this, it is recommended that those who do not have the necessary insurance can not buy, of course, it is the best full insurance.

If there is anything you can contact often?

1. The film is best pasted on, which can protect from the sun and is quite effective. The front windshield does not need to be pasted. It's best to have 3D floor mats on hand, as well as trunk mats.

Hand comfort for the cloth seat, it is recommended to put on a good-looking cloth seat cover. Since there is no engine anti-theft, it is better to install an iron general or something, it is better to have than nothing.

2. Buy the kind of sucking in the front glass of the car, the electronic dog and the GPS all-in-one machine, you can get it for 1500 yuan. Let them pretend to be Daotong, Kailide, very good to say, I go to Shandong, navigation all rely on Daodaotong to lead the way.

3. Compulsory traffic insurance must be on, and commercial insurance depends on how you choose. Since you are a newbie, it is recommended to go to the three, theft, paint, glass and no deductible. The first year of a novice is a road killer, and if you don't have confidence in yourself, it's best to get more of the three.

For more information, please refer to Ekcar Automotive.

Right-click on my computer, select Management, Services and Utilities, select Services, then there is a list of services on the right, find this Windows Audio, start it, you may have used some junk software to optimize your computer and cause the service to be closed.

It's already very detailed, if you can't find it yet, pure hand-hitting, I hope it can help you.

The solution is that the numerator = 3sin + cos = cos (3tan + 1), the denominator = 5sin-2 cos = cos (5tan-2) is brought into tan=2, and then the cos of the numerator and denominator is reduced to 7 8

Reverse calculations are sufficient.

It can be divided into 3 calculations.

The number of 5 is set to (x 2)+2=5, and the reverse calculation is (5-2)x2=6, so that the first step is calculated.

Then replace 6 with x and calculate the second time as, (6-2)x2=8.

The third calculation is, (8-2)x2=12, so the final answer is 12.