Follow our WeChat subscription account: Mechanical Industry Press E-World Long press the QR code above to recognize and follow us! Click the “Skill Improvement” menu to learn professional knowledge and download free resources! Reply “Lottery” to enter the lottery activity page to participate! Introduction The printed circuit board is abbreviated as PCB. It consists of … Read more
PCB (Printed Circuit Board) is an important component of electronic devices. The main function is to provide mechanical support and electrical connections for components. 01 The Inventor of PCB The creator of the printed circuit board is Austrian Paul Eisler. In 1936, he first used printed circuit boards in radios. (Baidu Encyclopedia) (From Wikipedia) Before … Read more
Click the above “Mechanical and Electronic Engineering Technology” to follow us Hey friends, today let’s talk about a topic that is both high-tech and close to our lives—PCBs (Printed Circuit Boards) in new energy vehicles. Sounds a bit fancy and mysterious, right? Don’t worry, we will slowly unveil its veil and see how this “unsung … Read more
FPGA has various configuration modes: the parallel master mode involves one FPGA and one EPROM; the master-slave mode supports programming multiple FPGAs with one PROM; the serial mode can use serial PROM to program the FPGA; and the peripheral mode allows the FPGA to be programmed by a microprocessor as a peripheral device. How to … Read more
OTA upgrades are no longer a novelty; most IoT terminal devices now have this capability. I previously shared an article on the principles of OTA upgrades: Dry Goods | Principles of Embedded OTA Upgrade Implementation. Today, I will share the detailed process of OTA upgrades using the AT32 as an example. . Overview Over-the-Air Technology … Read more
RS-485, with its excellent ability to resist common mode noise, is suitable for long-distance signal transmission, especially widely used in industrial environments. This article introduces the working principle of RS-485 and the EMI risks it faces (electrostatic interference, electrical fast transient bursts, and surge voltage), and discusses several EMC solutions that help RS-485 cope with … Read more
RS-485 (RS232 to RS485) bus interface, as an electrical specification for multipoint and differential data transmission, has become one of the most widely used standard communication interfaces in the industry. The RS-485 standard specifies only the electrical characteristics of the interface and does not involve connectors, cables, or protocols, allowing users to establish their own … Read more
Recently, a certain domestic smartphone manufacturer sparked the “Flash Memory Gate Incident” after being exposed by netizens for “mixing flash memory” in the same phone. As of now, it seems there hasn’t been a proper resolution to this issue, but the situation of “mixing flash memory” is not a secret in the industry, after all, … Read more
This article introduces the correct connection method for RS-485 networks, including suggestions for twisted pair wiring and proper installation of termination resistors. It lists the receiver waveforms under correct and incorrect termination. Configurations from simple single transmitter/multiple receiver networks to multiple transceivers and multiple branch circuits are provided. This article can serve as a basic … Read more
RF (Radio Frequency) and Mixed Signal PCB Layout Guidelines RF (Radio Frequency) and Mixed Signal (Analog & Digital Mixed Signals) PCB design requires special attention to issues such as signal integrity, noise control, and electromagnetic interference (EMI). Their layout differs from ordinary digital PCB design because they involve high-speed signals, the coexistence of sensitive analog … Read more