With the continuous expansion of innovative models, the LED industry and market in Guangdong Province have entered a virtuous cycle. In the past two years, the price of LED street light products has decreased by 40%, gradually approaching traditional lighting fixtures. After customers apply LED lighting products, they can significantly save energy and recover the renovation cost as soon as 3 years. Through a series of demonstration projects, the various advantages of applying LED lighting products have become widely recognized by society, and the enthusiasm for their promotion has greatly increased in many places. The widespread use of LED lights makes the night scenery in Guangdong particularly beautiful, especially in the Guangzhou area. As is well known, the night scenery in Guangzhou is very beautiful. The application of LED lights in Guangdong ranges from the remote Deqing mountainous area to developed areas such as Shenzhen and Dongguan. 800000 LED street lights illuminate
At present, LED products face the problem of relatively high costs. In terms of low-power lighting equipment, they cannot compete with rare earth energy-saving lamps, fluorescent lamps, and high-power high-pressure sodium lamps and halogen lamps. LED electroluminescence has high efficiency, but at the same time, it generates a lot of heat, which leads to LED light decay and ultimately shortens its working life. Moreover, LED lighting equipment faces the ceiling in terms of technology. Due to its low power of individual light-emitting components, it is necessary to combine them into relatively high power for practical use, which is a challenge. In order to dissipate heat, the engineering community has adopted various current heat dissipation technologies, including the most common metal fin heat sink, forced exhaust, heat pump refrigeration, heat pipe, phase change, and other heat dissipation and cooling technologies. This has led to LED lighting products with large volume, weight
As is well known, the interface of intelligent instruments was originally RS232, which can achieve point-to-point communication, but this method cannot achieve networking function. The subsequent RS485 resolved this issue. So the current RS485 interface is quite popular among intelligent instruments. Today, the editor will explain the application of self recovery fuses in the RS485 interface. RS485 has the advantages of long communication distance (over 1200m), high transmission rate (10Mbps), high signal-to-noise ratio, convenient control, low cost, and the ability to achieve multiple nodes on a single bus, as well as a variety of transceivers that can be used. It has been increasingly recognized by users. However, with the increase in usage frequency, the problems encountered by RS485 become more apparent. Due to its low voltage (only 5V), when using intelligent instruments with RS485 interfaces, the withstand voltage of the components themselves is also low, resulting in insta
In the long history of the development of fuses, the development has shifted from cylindrical, plug-in, axial or radial pin shapes to miniaturization and SMD. In more and more portable handheld electronic products, the application of SMD fuses has also begun to show an increasing trend. In just twenty years, the development of surface mount fuses has accounted for 30% of the overall small fuse application market, and is continuously expanding, gradually replacing other traditional forms of fuses, indicating its strong vitality. In 2005, the development of SMT fuses was increasing day by day, accounting for one-third of the total market share not only in terms of quantity but also amount. This has greatly promoted the development of the electronic industry and led to a continuous growth trend in the small fuse market. Surface mount fuses are the most valuable variety among small fuses, and their prices are also facing fierce competition, showing a decreasing trend year by year. Be
In the 1880s, since Edison invented the light bulb and failed countless experiments on tungsten wire, it also opened up the development history of fuses. The success of light bulbs has also driven the development of fuses. With the development of society and the increasing strength of electrical appliances, the fuse industry has also experienced rapid development. In daily life, the widespread application of the electronic age has led to the emergence of various types of electrical designs, with changes in both appearance and circuit structure. Therefore, the requirements for fuses are also greatly different, with modifications and upgrades made in terms of appearance/size/installation form/material/structure/specification/characteristics/application, all in order to better apply them in circuits, The development of these small fuses has gone through four revolutionary innovation milestones. Due to slight differences in the development of industries and environmental conditions a
For automotive fuses, let's first understand: fuses are common names, their scientific name is fuse, but we usually refer to them as fuses. Their basic function is to protect the circuit when overcurrent occurs. Generally speaking, fuses mainly have two important parameters: rated current and rated voltage. We usually choose the corresponding specifications of fuses based on the current and voltage of the circuit. Automotive fuses generally adopt a plug-in design, with a plastic outer shell wrapped in a molten structure made of zinc or copper, and a metal melt connected to the pins. The specifications of automotive fuses are generally 2A to 40A, and there will be a label at the top of the fuse. In general, fuses with different amperes have different colors, and according to international standards, we can identify the ampere number by color. For example: 2A gray, 3A purple, 4A pink, 5A orange, 7.5A coffee, 10A red, 15A blue, 20A yellow, 25A colorless transparent, 30A green, 40A d