Convenience Principle Potentiometers, adjustable capacitors, key switches, adjustable inductors and other regulating devices are often used in the design of circuit boards. We may adjust these devices after designing the whole circuit board, Some devices such as keys may also become the opening keys of the circuit board. Therefore, when designing such devices, they should [...]
1. Manual visual test Manual vision testing is to confirm the component mounting on PCB through human vision and comparison. This technology is one of the most widely used online testing methods. However, with the increase of output and the reduction of circuit boards and components, this method is becoming more and more unsuitable. Low [...]
Take you to know the quality and welding essentials of stainless steel flexible waterproof casing During the use of stainless steel flexible waterproof casing, we will encounter welding work. Do you know the essentials of stainless steel flexible waterproof casing welding? Here is a detailed introduction: 1. The overall dimension of the welding seam of [...]
PCB circuit board is the basic electronic component of all electronic circuit design. As the main support, it carries all the devices that make up the circuit. The function of PCB is not only to combine scattered components, but also to ensure the regularity of circuit design and avoid the confusion and errors caused by [...]
These details require attention when welding flexible sleeves The diameter and length of the bolt connecting the flange shall comply with the standard. After tightening, the length of the bolt protruding from the nut shall not be greater than the diameter of the bolt. After the installation of threaded flexible casing, there shall be 2-3 [...]
Variable frequency drive (VFD) is a power control equipment that uses frequency conversion technology and microelectronics technology to control AC motor by changing the working power frequency of motor. It is also one of the essential equipment in various industrial and commercial occasions today! In power quality assessment, frequency converters are typical harmonic source loads. [...]
LTCC low-temperature CO firing technology is generally used to make multilayer ceramic circuit boards, and multilayer ceramic circuit boards and low-temperature CO firing technology are required in some specific fields. Today, let's talk about the advantages and applications of LTCC low-temperature CO firing ceramic circuit boards. 1. What is LTCC ceramic circuit board LTCC ceramic [...]
1、 Red gum Red glue is a polyolefin compound, which is easy to solidify after heating. When its temperature reaches the freezing point of 150 ℃, red glue begins to change from paste to solid. Using this characteristic, patch components can be fixed by dispensing or printing, and circuit board components can be heated and [...]
After the wiring of the circuit board is completed, the planning rules of the circuit board shall be checked to ensure that the circuit board meets the planning requirements and all networks have been correctly connected. The inspection items commonly used in planning rule inspection are as follows: Places where PCB wiring needs to be [...]
Under a certain temperature and humidity environment and potential difference, electrochemical migration is easy to occur between adjacent lines and solder joints, resulting in insulation failure. In the case of serious dust pollution, the deposition of dust particles in electronic equipment changes the critical humidity on the surface of circuit board, thus changing the failure [...]