For most software engineers, you and he said resistors, capacitors, inductors, comes in clear, but if you mention to him diode, he may not know, because seemingly the teacher did not teach.
Diodes are essential components in the hardware, a lot of places to use it, then why do you want it?
First, it rectified. We use nothing more than DC and AC power supply, we have a lot of electronic components can not directly use AC power, because it changed the direction of the old ah, suddenly large and small amplitudes, who can not stand. Thus the need for AC into DC, the voltage is stable, the kind of the same current direction, the completion of this task the electronic component is a diode, the diode has a characteristic as is unidirectional, what is unidirectional, that only allows current the flow in one direction, a bit like a mouse cage that we were young to play, as well as fishing with a cage, the cage has such a feature that is only allowed to enter, not allowed out, and this is one-way, in fact, life, many examples of one-way, for example, send their children to school in the morning, are not allowed into the primary school is only allowed out, primarily for safety. Such unidirectional diode may be unidirectional AC into DC, of course, also need to add and buck regulator circuit, or otherwise can not be directly used.
Second, it can detector. The detector is a so-called useful signal is extracted from the modulated signal to, say for example, transfer the workpiece on the conveyor belt, when our workers over the workpiece, the workpiece will win, the detection process is similar, we only need to work, not We will win with a conveyor belt and the workpiece. Detection is to extract the useful signal. Radio is a practical application, when the radio early main element is a diode which detected the sound signal from the radio wave.
Diodes There are many other uses, such as regulators, switches, LED, etc., we first understand these, later combined with practical applications are introduced.
