Many friends encounter issues when flashing data on the vehicle, often experiencing disconnections that interrupt the flashing process and result in failure. In such cases, it is necessary to remove the ECU from the vehicle and use manual jumper wiring to perform the flashing. Without further ado, let’s go straight to the steps. Step 1: … Read more
If our board only has 4 interfaces: V3.3, SWDIO, SWDCLK, GND. Then the connection relationship with JTAG is shown in the figure below: Pay attention to the direction of the notch. Then GND can be connected to any pin on the left (except for the bottom pin). The 20-core to 4-core wire should be short; … Read more
In electrical automation projects, RS485 communication is often encountered, and many beginners are not very familiar with it. Today, we will discuss the applications related to RS485, and you will find that there is indeed a lot of knowledge involved. We will choose some common issues that are often considered in engineering for your reference. … Read more
1. PCB Layout 1. Follow the layout principle of “big first, small later, difficult first, easy later”, meaning that important unit circuits and core components should be prioritized in the layout. 2. The layout must refer to the schematic diagram and place components according to the signal flow rules of the schematic. 3. The arrangement … Read more
PCB, also known as Printed Circuit Board, enables the connection of electronic components and the realization of functions. It is also an important part of power circuit design. This article will introduce the basic rules for PCB layout and wiring. Basic Rules for Component Layout 1. Layout according to circuit modules. Related circuits with the … Read more
Common PCB Wiring Rules (1) Pre-divide digital, analog, and DAA signal wiring areas on the PCB. (2) Separate digital and analog components and place them in their respective wiring areas. (3) Keep high-speed digital signal traces as short as possible. (4) Keep sensitive analog signal traces as short as possible. (5) Reasonably allocate power and … Read more
(1) Pre-define digital, analog, and DAA signal wiring areas on the PCB. (2) Separate digital and analog components and their respective traces as much as possible, placing them in their designated wiring areas. (3) Keep high-speed digital signal traces as short as possible. (4) Keep sensitive analog signal traces as short as possible. (5) Allocate … Read more
We believe that everyone finds wiring to be an essential part of PCB design, and the rationality of the wiring determines the aesthetics and production costs of the PCB. It also reflects the performance of the circuit and heat dissipation, as well as whether the performance of the components can be optimized. This article will … Read more
This article is dedicated to those who are overwhelmed by too many messy wires and don’t know what to do… The five-party intercom is one of the emergency rescue features of elevators, and it is a mandatory inspection item during elevator installation acceptance and annual inspections. In our community, the intercom between the car and … Read more
The RS485 bus is widely used in various fields such as video surveillance, access control intercoms, and building alarms due to its simple wiring and reliable stability. However, many inaccurate concepts during the wiring process can lead to various issues. Here are some summarized misconceptions. 1. The 485 signal line can be run alongside high-voltage … Read more