-
After the pre-order of the new iPad Pro was opened, the repair cost of iPad Pro (fifth generation) was also released. Weiphone.com learned from Apple's official website that the out-of-warranty rep...[Details]
-
CJ series AC contactors are widely used in low-voltage power distribution due to their low price and long service life. However, they have large power loss and noise during operation, and often bur...[Details]
-
LED is a solid-state electric light source and a semiconductor lighting device. Its electrical characteristics are highly discrete. It has the characteristics of small size, high mechanical strength,...[Details]
-
Abstract: Aiming at the low automation level, low detection accuracy, narrow detection range and poor visualization of domestic ceramic performance detectors, a ceramic detection real-time control sy...[Details]
-
"Globalization is dead, and free trade is also on the verge of death." In a forum held recently, TSMC founder Chang Chung-mou and Chris Miller, author of " Chip Wars," had a public conversation. Zh...[Details]
-
Samsung Display will become the exclusive supplier of organic light-emitting diode (OLED) panels for Apple to use in its two highest-end models of the next-generation iPhone. Both iPhone 13 models...[Details]
-
According to the latest issue of ACS Nano, a journal of the American Chemical Society, researchers from the University of Illinois at Chicago (UIC) successfully used graphene to detect the new corona...[Details]
-
Helian Electronics, a professional authorized distributor of interconnect and electromechanical products, was recently invited to participate in the "2019 Huaqiang Electronics Network Quality Supplie...[Details]
-
1. Introduction
With the rapid development of power electronics technology, DC power supplies are widely used. Their quality directly affects the working performance of electrical equipment or...[Details]
-
Currently, surface coatings are one of the most advanced thermal camouflage technologies. The coating absorbs the heat from the wearer's body and changes the heat emitted by the clothing. However, ...[Details]
-
At present, coal and oil are the main energy sources used in my country. Their huge consumption is not only the main source of air pollution, but also their non-renewable nature means that they will g...[Details]
-
Main parameters of transistor
1. DC parameters
(1) Collector-base reverse saturation current Icbo, when the emitter is open (Ie=0), the collector reverse current when a specified revers...[Details]
-
The first thing we think of to protect LEDs is to use fuses, but fuses are disposable and react too slowly, which not only has poor effects but is also troublesome to use in practice. Therefore, fu...[Details]
-
In Jiujiang City, Jiangxi Province, new energy buses shuttle through the city streets. But in winter, when the heater is on, the battery power drops quickly, and it needs to be charged at a charging s...[Details]
-
To modify the IP of the ARM development board, if it is a yaffs2 file, you can 1. First, modify the /etc/init.d/rcS file in /sbin/ifconfig lo 127.0.0.0 Add a line under /sbin/ifconfig eth0 192.16...[Details]
PCB Design
京公网安备 11010802033920号
EEWORLD