The circuit is shown above. C1, R1 are power-on reset circuits, and K is a start/stop switch. The IC uses AT89C2051. Its P1.O and P1.1 ports are also the input terminals of the internal comparator. In order to ensure the normal operation of the program, an external pull-up resistor is req.......

• Posted on July 27, 2019

Recently, the "Red Bib" client software developed by Guangdong Unicom and Sina was officially launched in the App Store. The red bib iPhone client has a very fashionable "voice microblogging" function. According to the relevant person in charge of Guangdong Unicom, users onl.......

Which woman does not want to be beautiful, keep young forever, and retain beauty? So how do you keep a woman beautiful? There are many ways to go to the beauty, but some foods can make you more and more young. Let's take a look at the younger food. Green tea contains polyphenols that are a .......

On February 24, 2011, after Beijing’s Yuan Quan’s son, in addition to participating in a drama performance, there was no high-profile announcement of the comeback. The informed person said that her body has been restored to slim and she is now actively preparing for the comeback, .......

• Posted on July 20, 2019

On the 17th, it was learned from the Nanchang Science and Technology Bureau that Nanchang City will promote the demonstration and application of more than 300 energy-saving and new-energy vehicles in public areas such as public transportation, rent.......

Do you like milk? Beauty and skin care milk is fascinating to many girls. If you want to lose weight, you may choose milk, because milk has a magical weight loss effect! Here are some of the six milk weight loss methods that female celebrities love to see. Which one do you want to try? Elva Hsi.......

The LED is called a fourth-generation illumination source or a green light source and is a semiconductor solid-state light-emitting device. In 1955, American radio company Rubin Braunstein discovered the infrared radiation of gallium arsenide (GaAs) and other semiconductor alloys. In 1962, Nick.......

There are some high-brightness LED chips on which the positions of the two electrodes of pn are close to each other, which improves the luminous efficiency and heat dissipation capability of the chip.

From the evolution of the chip, it .......

LED material

LED is called Light Emitting Diode. Chinese is a light-emitting diode. It is a solid-state semiconductor device that can directly convert electrical energy into visible light. Compared with traditional light sources, LED.......

In order to further expand the green energy industry such as solar cells and LEDs, Taiwan UMC (2303) added NT$1.5 billion (the same below) to its subsidiary, UMC's new investment business.

It is reported that as early as October .......