Teach you how to choose electronic equipment (01)

Teach you how to choose electronic equipment (01)

Electronic components are widely used in many electronic devices, and their role is irreplaceable. The selection of electronic components also requires careful consideration.

1、 The Importance of Selecting electronic equipment

Clearly marking the specifications, types, and parameters of each component on the circuit diagram is the basis for selecting electronic component equipment. The components and equipment marked on the schematic diagram of the already finalized product are put into production through planning, research and development, and trial production. The various parameters are determined based on the method of "qualitative analysis, quantitative budgeting, and experimental adjustment". In general, is it allowed to replace the selected meta equipment. However, for electronic product developers, amateurs, and repair personnel, due to the influence of objective conditions and many other factors, under the conditions that meet the skill requirements and standards, due to the small amount used, they can also flexibly choose electronic equipment.

In some specific cases, even if there is a schematic diagram, due to the incompletely marked parameters of some elements and equipment, such as the Electrolytic capacitor is only marked with electrical capacity but not with withstand voltage, it should be reconsidered in the power circuit; If the on-site conditions of product application do not match the skill data, some meta equipment can be adjusted to adapt to practice; Individual meta equipment cannot be purchased locally, and can be replaced with meta equipment that meets the requirements; During the repair process, if it is found that there are unreasonable aspects in a single piece of equipment, it is necessary to replace it with a suitable piece of equipment.

Electronic element equipment is a basic unit of a circuit that performs predetermined functions without dismantling and differentiation, such as resistors, semiconductor discrete equipment, semiconductor integrated circuits, microwave element equipment 'relays' magnetic element equipment, switches, electrical connectors, filters, sensors, fiber optic materials, etc. Practice has proved that in electronic equipment, 44%~67% of the total failures of primary equipment are caused by improper selection, while the Failure rate caused by the quality of primary equipment itself accounts for 33%~46%. Therefore, the selection of meta equipment plays an important role in circuit planning, and planners must attach great importance to it.