How to add USB to virtual serial port device for rk3288

When the system is turned on and the log is printed, insert the USB device, and the USB device and virtual serial port information will be printed. The printing information is as follows: Supplier ID (VID): idvendor = 1234, product ID (PID): idproduct = 5678 Product, manufacturer and serialnumber are temporarily unavailable. Ttyacm0: virtual serial […]

Read More

Digi key announces vendor driven kicad database

Shanghai, China – digi key electronics, a global distributor of electronic components, announced the launch of a new second kicad database, digi key partner database, on GitHub. The database aims to supplement the existing digi key kicad database released last year. Since the database released last year was planned and developed by the digi key […]

Read More

Analysis of impedance control and stack design in PCB design

With the increasing speed of PCB signal switching, today’s PCB designers need to understand and control the impedance of PCB trace. Corresponding to the shorter signal transmission time and higher clock rate of modern digital circuits, PCB traces are no longer simple connections, but transmission lines. In practice, it is necessary to control the trace […]

Read More

Characteristics of high density HDI circuit board

Since the printed circuit board is not a general terminal product, the definition of the name is slightly confused. For example, the motherboard for personal computer is called the motherboard rather than the circuit board directly. Although there are circuit boards in the motherboard, they are different. Therefore, when evaluating the industry, the two are […]

Read More

Introduction of several common PCB layout design simulation software

Schematic design software It’s OK to know OrCAD. There are a lot of netlist supported, which is basically the industry standard. PCB layout software 1. Protel, now push Altium designer. The mainstream of domestic low-end design is basically not used abroad. Easy to learn, suitable for beginners, easy to use; It occupies a lot of […]

Read More

Analysis of etching technology in PCB production

An improved etching technology for ultra fine structures by Frank Baron and Ron Salerno. The etching process is one of the basic steps in the PCB production process. In short, the base copper is covered by the resist layer, and the copper not protected by the resist layer reacts with the etchant, which is bitten […]

Read More