那我就翻译几段呗，其他大家都能看懂，就不翻译了。

How does LC Meter Work?
电容电感表是怎样炼成的

To be able to determine the value of an unknown inductor / capacitor we can use the frequency formula given below.

要知道一个未知电感或者电容的值，我们可以使用下面这个谐振频率公式：



Note that there are three variables that we can work with; f, L and C (f represents a frequency, L inductance and C capacitance). If we know the values of the two variables we may calculate the value of the third variable.

注意这个公式里有三个变量，频率f，电感L，和电容C。如果我们知道其中两个，就可以直接算出第三个。

Lets say we want to determine the value of an unknown inductor with X inductance. We plug X inductance into the formula and we also use value of a known capacitor. Using this data we can calculate the frequency. Once we know the frequency we can use the power of the algebra and rewrite the above formula to solve for L (inductance). This time we will use the calculated frequency and a value of a known capacitor to calculate the inductance.

假设我们要确定未知电感的值，设其为X。
把X代入公式，然后选择一个已知容量的电容C，就可以计算出频率f。这样一来，如果频率f可以直接测量，我们就可以把公式反过来使用，利用f和C算出电感X的值。

Isn't this amazing? We just calculated the value of unknown inductor, and we may use the same technique to solve for the unknown capacitance and even frequency.

屌吧？就这样，一个未知的电感量就被计算出来了。当然，我们也可以用同一个公式计算电容C，以及频率f。

Applying the Theory to LC Meter's Hardware
实践是检验仪表的唯一标准

Now let's use the above theory and apply it to electronics. The LC Meter uses a popular LM311 IC that that functions as a frequency generator and this is exactly what we need. If we want to calculate the value of an unknown inductor we use a known Ccal 1000pF capacitor and the value of an unknown inductor. LM311 will generate a frequency that we can measure with a frequency meter. Once we have this information we can use the frequency formula to calculate the inductance.

下面，就让我们以电子电路的形式，实践之前提到的理论。电容电感表（下称LCM）采用了一颗物廉价美的LM311比较器作为频率发生器。如果我们要测量未知电感，只需要把一个已知的1000pF校准电容Ccal（cal=calibration 校准）放进电路，让LM311来生成一个可以用频率计测量的频率。只要我们知道了谐振频率，我们就可以用最开始提到的频率公式，来计算未知电感的值了。

The same thing can be done for calculating the value of a unknown capacitor. This time we don't know the value a capacitor so instead we use the value of a known inductor to calculate the frequency. Once we have that information we apply the formula to determine the capacitance.

同理，也可以用这个方法测量未知电容。

All this sounds great, however if we want to determine the value of a lot of inductors / capacitors then this may become a very time consuming process. Sure, we can write a computer program to do all these calculations, but what if we don't have an access to a computer or a frequency meter?

劲酒虽好，但是如果我们要测量一大波未知的电容和电感，岂不是每个都要用频率计测一遍？那还不得烦死。当然，我们可以用一台电脑控制频率计读取数据，然后用电脑程序计算电容或者电感值。问题是，如果你没有频率计或者电脑怎么办？

That's were PIC16F628A microcontroller comes handy. PIC16F628A is like a small computer that can execute HEX programs that are written using an assembly language. PIC16F628A is a very flexible microcontroller because it has PINs which can be configured as inputs and outputs. Besides that, PIC16F628A IC requires very minimal number of external components like 4.000MHz crystal / resonator and a few resistors. Before PIC16F628A microcontroller can be used it has to be programmed with a HEX code which has to be sent from the computer. All Accurate LC Meter kits already come with microcontroller that is already programmed and ready to be used.

所以说PIC16F628A单片机就牛逼在这里。它取代了电脑和频率计的作用，测量结果还可以直接输出到1602显示屏上。不会编程怎么办？直接买我们套件，程序预先刷好了，装上就能用，晒图好评全五分返现十元。

In the next step we use the frequency generated by LM311 IC and pass it on to PIC 16F628A's PIN 17. We designate this PIN as an input, as well as all other PINs that are directly connected to switches. User can use these inputs to tell the microcontroller to execute specified set of instructions or perform calculations.

LM311产生的频率信号，直接送入单片机的17脚。



Once the microcontroller will calculate the unknown inductance or capacitance it will use PINs that are designated as outputs and pass the results onto the 16 character green backlighted LCD display.

单片机算出电感或者电容值之后，会通过另外一组针脚将数据写入1602显示屏。