Timer circuit design using LED dynamic display

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.......

Health: These foods can keep women going

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 .......