Basic electronic components and their functions
Published time: 2019-07-18
Electronic components play an important role in our lives, but not many people have a deep understanding of it. I spent a lot of time looking for information to sort out this article. If you read it carefully, I believe that you will have many gains.
Electronic component types and their functions
The resistor can be divided into a fixed resistor and an adjustable resistor, and the difference is whether the resistance is adjustable. The resistors can also be divided into in-line resistors and chip resistors, which are differentiated according to the way the resistors are mounted. In addition, according to the material process classification, the resistance can be divided into solid core resistance, wire wound resistance, film resistance, and sensitive resistance.
The inductor converts electrical energy into magnetic energy and stores it. If the inductor is in a state where no current is flowing, it will try to block current from flowing through it when the circuit is turned on; if the inductor is in a state where current is flowing, the circuit is disconnected. It will try to keep the current constant. Its main functional characteristics are through DC and AC, through low frequency and high frequency, the function is filtering, oscillating, storing magnetic energy, etc., mainly divided into air core inductor and core inductor.
The triode is often represented by a "Q" plus a number in the circuit, such as: Q3 represents a triode numbered 3. The triode is a special device that contains two PN junctions and has amplification capability.
A capacitor is an electronic component that holds a charge and is represented by the symbol C. The capacitor is composed of an insulating dielectric sandwiched between two metal electrodes. When a voltage is applied between the two metal electrodes, the charge is stored on the electrode, that is, the electrical energy is stored, so the capacitor is the energy storage element.
A diode is an electronic component with two electrodes and allows only current to flow in a single direction, blocking current in the reverse direction. Diodes have different types of classification. According to the material, they can be divided into silicon diodes and germanium diodes. According to their applications, they can be divided into rectifier diodes, Zener diodes, detector diodes, light-emitting diodes and photodiodes.
Field effect transistor
Field Effect Transistor (FET) is abbreviated as FET. Conductors are involved in majority conduction, also known as unipolar transistors. It belongs to a voltage controlled semiconductor device. It has high input resistance (108～109Ω), low noise, low power consumption, large dynamic range, easy integration, no secondary breakdown, wide safe working area, etc. It has become a powerful bipolar transistor and power transistor. competitor.
Used to reduce high voltage to low voltage, or boost for high voltage devices.
MCU or IC
It is the core brain used in intelligent circuits.
A sensor is a physical device or biological organ that detects and senses external signals, physical conditions (such as light, heat, humidity) or chemical components (such as smoke) and transmits the detected information to other devices or organs.
The above mainly introduces the types and functions of electronic components, and then together to understand the most important questions for everyone.
How to choose electronic components
In the case of similar functions, performance, and usage rates, try to choose components with better price and reduce costs.
If the selected components are widely used, the use of cold-gate and partial-gate chips should be minimized to reduce development risks.
Principle of sustainable development
Try to choose components that will not be discontinued for the foreseeable time.
Procurement convenience principle
Try to choose components that are easy to buy and have a short lead time.
Try to choose a pin to pin compatible chip brand with more components.
Upward compatibility principle
Try to choose the components used in the old products.
Resource conservation principle
Try to use all the functions and pins of the components.
The relevant knowledge about electronic components is introduced here, I hope to help you.
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