First of all, we need to know what kind of functions our electronic devices want to achieve, and it is important to determine whether the components can meet the requirements of electronic devices. If the electronic equipment components meet the functional requirements, engineers need to evaluate from the aspects of functional requirements, performance requirements, technical support, cost evaluation and availability, whether this product can bring a certain profit.

The evaluation of hardware functions and performance requirements is mainly the selection of the main chip, which requires specific analysis and comparison of the main chip's storage capacity and speed, IO port allocation and interface resources. After the main chip is determined, other components and devices need to be determined according to the diversity function to achieve the good performance and cost of the overall solution. After the main chip is determined, the details of the design of the software driver layer are basically determined. When selecting components, it is important to check the unit price of the component. Your chips, resistors, capacitors, etc. may have cheaper versions that do the same job as the previous components.

After the overall hardware plan is determined, then enter the development stage: hardware schematic design, PCB board design and production, BOM list and PCB board placement.
Schematic design and PCB design

The schematic design is to facilitate the analysis of the circuit, to unify the appearance of the device, so that others can easily understand it. The principle analysis is through the schematic, and it is also imported into the PCB by him. The PCB layout is to package the components of the PCB. After the unification, it is messy after importing the PCB, and you need to unify the layout by yourself. The PCB needs to be proofed and soldered, and the functional modules of the schematic design are debugged. If there is no problem, it can be mass-produced normally. The hardware is the core of the product, which is equivalent to the human brain. Only the product hardware is stable to support the software.