Where'd OBD II come from

To combat its smog problem in the LA basin, the State of California started requiring emission control systems on 1966 model cars. The federal government extended these controls nationwide in 1968.

Congress passed the Clean Air Act in 1970 and established the Environmental Protection Agency (EPA). This started a series of graduated emission standards and requirements for maintenance of vehicles for extended periods of time. To meet these standards, manufacturers turned to electronically controlled fuel feed and ignition systems. Sensors measured engine performance and adjusted the systems to provide minimum pollution. These sensors were also accessed to provide early diagnostic assistance.

At first there were few standards and each manufacturer had their own systems and signals. In 1988, the Society of Automotive Engineers (SAE) set a standard connector plug and set of diagnostic test signals. The EPA adapted most of their standards from the SAE on-board diagnostic programs and recommendations. OBD-II is an expanded set of standards and practices developed by SAE and adopted by the EPA and CARB (California Air Resources Board) for implementation by January 1, 1996.

Yeahui is a connector supplier with 11 years of experience in developing high quality connectors and wiring harnesses. wo have many types of products, including obd connectors, circular connectors, agricultural connectors and so on.We can meet the requirements of various customers. Feel free to learn more about connectors or buy our connectors,looking forward to your message.

Read more about the connectors(What constitutes RF coaxial connector reliability).

What constitutes RF coaxial connector reliability

Reliability refers to receiving the expected levels of performance from a cable assembly every time it is used, without degradation or loss in performance for the full lifetime of the application. Failure of a cable assembly can be expected when it exceeds the mechanical or electrical or environmental limits set for it, such as forming a flexible cable into a bend radius smaller than the recommended minimum or applying RF/microwave power levels higher than the rated maximum or operating the cable assembly at temperatures exceeding the specified operating temperature range. The definition of reliability becomes more complex when limits are set for performance degradation that is acceptable over time, and the performance of a coaxial cable assembly can be described by many different parameters, such as insertion loss, VSWR, and phase stability.

The reliability of a cable assembly may be linked to maintaining tight control on just one or two performance parameters or on a full set of parameters. The required tolerances for what describes a hi-rel cable assembly can differ from one application to another. For example, a variation of ±2 dB in insertion loss over certain temperature and frequency ranges may constitute excellent reliability for a system requiring ±3 dB insertion-loss stability but may result in the failure of a system requiring ±0.5 dB insertion-loss stability. The reliability of a coaxial cable assembly is very much a function of an application and its operating environment.

The reliability of cables and connectors for military and aerospace applications is guided by many different military standards, such as MIL-DTL-17 coaxial cables and MIL-PRF-39012 RF coaxial connectors. MIL-DTL-17 covers many different applications, operating environments, and sets of performance specifications for different coaxial cables, with a great deal of attention paid to the center conductor dimensions and the materials chosen for the center conductor, such as tin, silver-coated copper, and copper-clad steel conductors.

Coaxial connectors for military and aerospace applications must often meet the standards contained within MIL-PRF-39012, which is used by all departments and agencies of the U. S. Department of Defense (DoD). It covers general requirements and test methods for characterizing RF connectors used with flexible and semirigid coaxial cables for military applications, and applies to many different types of connectors, including field-serviceable and non-field-serviceable connectors.

Yeahui is a connector supplier with 11 years of experience in developing high quality connectors and wiring harnesses. wo have many types of products, including obd connectors, circular connectors, agricultural connectors and so on.We can meet the requirements of various customers. Feel free to learn more about connectors or buy our connectors,looking forward to your message.

What should I pay attention to when designing USB Type-C?

Today's USB type-c standard has gradually become the mainstream of USB connector interface. The production design and development of smarter connectors, plug interfaces and USB cables are the issues and development directions that connector manufacturers need to pay attention to. USB type-c The range of applications that the standard can provide is also increasing, and the rules of this series are continuing to evolve. Such a solution can be connected without separate power adapter data and power transmission, and is widely used in portable devices, data centers, infotainment systems, and outdoor LED display devices. Therefore, engineers need to pay attention to three key design points when designing USB Type-C connectors.

power supply

It is critical that the USB Type-C connector cable sends and receives the right amount of power and requires the correct components. A suitable resistor and a system for leveling power will ensure that the cable consumes only the same amount as the host device. Electrical energy.

Multi-function signal transmission

The USB Type-C standard also requires cables to use precise wire sizes and the correct connector construction. Proper signal integrity, as well as protection against RF and electromagnetic interference, allow the multifunction signal to work effectively. Vendors with some USB Type-C connector solutions can provide a shield design on the back of the socket housing to help eliminate unwanted electromagnetic interference (EMI) leakage.

Sturdy structure

Enhanced retention and splash-proof options should be provided during product design to ensure that USB Type-C connectors can operate in harsh industrial environments, which requires enhanced environmental sealing and mechanical strength. For beginners, the IEC-60529-IP67 specification ensures a joint seal to prevent ingress of dust and is protected by high pressure water jets. It also supports immersion in water for a limited time.

On the other hand, the rugged construction of the USB Type-C connector can be done with upgraded materials such as gold-plated and nickel-plated contacts to prevent corrosion. Design features such as conductive silicone rubber gaskets and threaded panel connection points also allow the connector to operate in extreme environments, and the USB Type-C connector also features through-hole mounting for a mechanically robust PCB connection.

Yeahui is a connector supplier with 11 years of experience in developing high quality connectors and wiring harnesses. wo have many types of products, including obd connectors, circular connectors, agricultural connectors and so on.We can meet the requirements of various customers. Feel free to learn more about connectors or buy our connectors,looking forward to your message.

Read more about the connectors(What are the advantages of the circular connector).

What are the advantages of the circular connector

In the process of production of circular connectors, after repeated research by technicians, the production process has been gradually improved, and in the process of assembly, the device process of electronic products has been gradually simplified, and the batch production process is also Continuous simplification. In addition, when the device is in use, there is an accident or some kind of electronic component failure, if the device uses the connector, the component of the component can be replaced relatively quickly, and thus the advantages of the circular connector are also It is easier to repair. 

With the continuous development of modern technology, the components of the equipment are relatively easy to fall behind. If the device is installed with a connector, the update of the device is more convenient, which is of great help to maintain our equipment and production. 

When designing and manufacturing new products, professional engineers can use the latest system of component parts. At this time, the flexibility of the connector can be realized, and the flexibility of product design can be effectively improved. In short, it is precisely because of the obvious advantages of the circular connector, therefore, in the construction machinery industry, the concept of this circular connector has been widely used, automotive parts production lines, electrical and electrical systems, instrumentation, minerals, Oil and gas drilling and anti-corrosion engineering wind energy and solar energy, etc., as well as automated substations and other fields have been widely used, more and more meet customer needs, and have been loved by customers. 

Yeahui is a connector supplier with 11 years of experience in developing high quality connectors and wiring harnesses. wo have many types of products, including obd connectors, circular connectors, agricultural connectors and so on.We can meet the requirements of various customers. Feel free to learn more about connectors or buy our connectors,looking forward to your message.

Read more about the connectors(Improve the durability of fiber optic connectors).

Improve the durability of fiber optic connectors

The horizontal fiber optic splice connector is an indispensable part of the optical fiber communication line. Its main function is to realize the connection of the optical fiber cable. At the same time, in order to ensure the grounding function of the optical fiber connector, the internal grounding device and the grounding portion of the optical cable should be electrically connected, and the optical fiber. The metal parts of the connector and the grounding device should be electrically connected. In order to avoid adverse effects on the cable joint closures, it is important that they are insulated from one another and that the pressure resistance of the fiber connector joints is improved.

In order to prevent lightning strikes or other factors, the fiber splice connector must meet the standard application of 15 VDC for 1 minute without breakdown and no arcing. Therefore, high requirements are placed on the fixing and grounding of the fiber splice connector and the design of the insulating material used. Reasonable and sturdy insulation is the fundamental guarantee for high voltage DC breakdown. There are many insulating materials on the market today, but we need to make appropriate choices based on the standard requirements, combined with the dielectric properties and plasticity of the material itself.

Therefore, the structure and material of the insulation as well as the surface condition also have a great influence on the withstand voltage strength performance of the fiber splice case. If you want to improve the withstand voltage performance of fiber splice connectors, you must use a better insulating material, such as Teflon, to increase the surface finish and reduce the curvature between the insulators and between the poles. Insulating gaskets commonly used in fiber optic splice closures typically consist of two upper and lower spacers, the upper washer being a recessed washer and the lower washer being a male washer.

Yeahui is a connector supplier with 11 years of experience in developing high quality connectors and wiring harnesses. wo have many types of products, including obd connectors, circular connectors, agricultural connectors and so on.We can meet the requirements of various customers. Feel free to learn more about connectors or buy our connectors,looking forward to your message.

Read more about the connectors(Prospects for FPC connectors).

Prospects for FPC connectors

FPC connector This type of connector, in addition to some electronic engineers, many of us may not have a specific understanding of the concept. So we often come into contact with connectors. For example, we often use computers, cars, mobile phones and important components that are indispensable in all kinds of home appliances. Connectors are an important bridge for communication and communication between various parts, and they are widely used in real life. After social and economic development, China has become the world's largest connector production base, and the FPC connector is a type of connector, which is now mainly used in mobile phone.

So what is the FPC connector? The FPC connector is a PCB made of soft material that can be used on a mobile phone for a simple circuit link, which is known as a cable, and it can also be used as a complex circuit. With the increasing use of mobile phone applications, the application of FPC connectors will be more and more, and the types of FPC connectors are also various. For example, LED display screens need to be connected to the PCB to the FPC connector, although the 0.3mm pitch FPC connector products have been put into use. However, with the continuous development of technology, it is gradually developing towards 0.4. In the future, the number of pins of the FPC will be reduced, and the components of other mobile phones will be placed together in the frame of the LED, so the FPC connector is oriented toward precision, Simple, convenient and miniaturized.

The development of board-to-board connectors is also evolving, and will become smaller and smaller in the future. The height of the pins and the pitch of the pins will become smaller. Although it is still dominated by 0.4mm, it is moving toward 0.35. Direction development. Reducing the volume is bound to be the development trend of FPC connectors, and the visual effects and waterproof functions are also the future development trend. The connector for the battery, as one of the FPC connectors, will be further miniaturized, enabling low contact resistance and improving connection reliability.

Yeahui is a connector supplier with 11 years of experience in developing high quality connectors and wiring harnesses. wo have many types of products, including obd connectors, circular connectors, agricultural connectors and so on.We can meet the requirements of various customers. Feel free to learn more about connectors or buy our connectors,looking forward to your message.

Read more about the connectors(Increase the life of connector electronics).

Increase the life of connector electronics

The useful life of connector electronics can often determine the life of an electronic connection system in the industry, from manufacturing to automation. When troubleshooting after a machine or connection system failure, the failure may be related to a failure of the connector electronics of the critical system. What problems should we pay attention to in order to prevent this from happening?

Heat is the number one enemy of electronic components and one of the main reasons for the failure of early manufacturing products. Thermal damage is caused by improper cooling, which greatly reduces the reliability of the components. Every electronic component should be manufactured with the ideal operating temperature in mind, and if you exceed the operating temperature limit, you should be aware of this.

When an electronically connected device uses an open loop cooling system, ambient air is blown through the electronic components to remove the operating heat of the connector. For example: add a blower, fan or electric impeller. They can be mounted at or around hot spots to prevent thermal damage to the connector electronics. But the open loop system can only achieve so much, if the surrounding air is very hot, it can only reduce a certain amount of heat.

A closed loop cooling system reduces temperature while keeping ambient air unaffected by the system. Air or water and air heat exchangers are examples of closed loop systems,whice is an ideal solution when the ambient temperature is too high for the open loop system, or if the air is highly contaminated and the filtration system is not sufficient for disinfection.

Yeahui is a connector supplier with 11 years of experience in developing high quality connectors and wiring harnesses. wo have many types of products, including obd connectors, circular connectors, agricultural connectors and so on.We can meet the requirements of various customers. Feel free to learn more about connectors or buy our connectors,looking forward to your message.

Read more about the connectors(The advantages of the FPC connector).