Many engineers are reading this series, and a lot of people thumbs up, thank you very much. But there are a lot of people are wondering, how did not get hold of led flash, or hardware to segment code immediately see the effect.
My suggestion is, write the code segment for software engineers is a common practice, not a surprising thing, but to have a preliminary understanding of the hardware, is still very important, after all, before we had any contact with the hardware, so it is still first get to know some basic elements, in which case, a circuit diagram can be read, do some simple circuit, when the program control again later.
Then said capacitors, resistors and the same. Our impression, resistors, capacitors, inductors, three brothers, in fact, indeed is the case, these three elements are very common, and ultimately, the general circuit the three of them.
Capacitors, actually two metal conductors, the middle filled with some insulating material, called media professional terms, in fact, some of the insulation material, anything can, paper, cotton, glue, wood, stone, etc., anyway you can think of will do, but the dielectric constant of each of the insulating material is not the same, what is the dielectric constant? You understood as a characteristic value of the insulation material on the line, which determines the size of the capacitance, we understand that's it, then again, do not get too obsessed with theory.
Each capacitor has a capacitance and voltage values, we need to understand, additional capacitance is also divided into polar and non-polar capacitors, electrolytic capacitors we usually use is polar capacitors, batteries and the so-called polarity is the same, points positive and negative, not random access, the reverse may be burned. Commonly used ceramic capacitor is non-polarized capacitor, this capacitor can be easily connected. Further, the capacitance value of the pressure-resistant, especially electrolytic capacitors, are generally marked in the capacitor above.
It characterized by discharging the capacitor charging, and rechargeable batteries similar, but two different mechanisms.
The role of capacitance is very large, very wide use, is obvious role is to "every straight pay", blocking is to isolate DC, DC will not let you in the past; is to make you pay through the AC in the past. There are differences on pay, low capacitance allows high frequency waveform of the past, a large capacitance can make low-frequency waveform of the past, more bizarre behavior. Because there is such a capacitance characteristics, so you can use it to filter. How filtering? Time is waveform (such as a carrier signal) and a high frequency wave of low frequency (such as an acoustic signal) together with a small capacitor and a large capacitor combination, and carrier signal and the acoustic signal is to go their Dao.
There is capacitive coupling effects in the amplifier circuit, usually multiple stage amplifier, the amplifier circuit of each stage has its own site, we can not correlated interference, i.e. the DC operating state can not be affected, for this purpose, each get hold of a capacitor connected, so that the DC go through, but the AC signal can be in the past, therefore, before and after will not be affected.
Visible, the capacitance is very important electronic components, we are sure to know about it.
