Recently, a research and development team composed of Taiwan and Mexico has successfully developed a new type of LED street lamp, which will reduce the light pollution generated by the street lamp. It is reported that 20% of the light emitted by LED street lamps on the market today is light pollution, and this newly researched LED route can reduce this value to 2%. The New Jersey Astronomical Society pointed out that about 30% of the light is exposed to places that do not need lighting, and this light leakage also has a negative impact on nature-birds feel the brightly lit night Confused, the turtle who needed to guide the night sky was also lost on the way to the ocean, and many other animals' sleep patterns were also disrupted. The new LED street lights will reduce these impacts on nature. According to reports, this lamp can also be adapted to various environments. Ching-Cheng Sun, a member of the R & D team, pointed out that the design of street lamps people use now is only applicable to areas with high traffic volume, but not to other areas. He said that the new LED route can change this situation and be used in a variety of environmental conditions. In addition to reducing light pollution, the new LED also has the function of reducing energy consumption. Sun said that they will complete the prototype development of this street lamp within 3 to 6 months, and hope to officially put it into production next year.
Small computer system interface (SCSI) is an independent processor standard for system level interfaces between computers and intelligent devices (hard disks, floppy drives, optical drives, printers, scanners, etc.). SCSI is an intelligent universal interface standard.
The last SCSI device in the SCSI chain uses a terminator, and the intermediate device does not need a terminator. Once the terminator is used by the intermediate device, the SCSI card cannot find the future SCSI device. If the last device does not use a terminator, SCSI will not work properly. Terminator is composed of resistors, located at the end of the SCSI bus, to reduce the mutual influence of the signal, maintain the constant voltage on the SCSI chain. SCSI-90°DIP Section ShenZhen Antenk Electronics Co,Ltd , https://www.pcbsocket.com
Most of the SCSI devices have built-in terminators and use a jumper to control on / off. The SCSI device is highly intelligent and can automatically control the terminator on / off. For example, if a hard disk is connected to a CD-ROM, the CD-ROM can work normally regardless of whether the terminator of the hard disk is on or off. However, when two hard disks are connected, the situation becomes more complicated. Before two Seagate hard disks are connected, one hard disk terminator must be off. Before a Seagate hard disk is connected to a quantum hard disk, a hard disk terminator can work normally regardless of whether it is on or off.