Single chip electronic alarm clock

The microcontroller used is STC89C52. 
This design can display the year, month, day, hours, minutes, and seconds, and has an alarm function. The hours, minutes, and seconds can be freely adjusted through 8 buttons. The alarm ringing time
has a reset button. If the module is deflated, just press the reset button!
Use LCD16020A screen display. The screen circuit is equipped with a potentiometer, which can adjust the screen clarity freely.
 
I have marked the value and model of each component on the schematic diagram to facilitate the purchase of the correct components.
 
All components on the PCB use pure plug-in methods, which is convenient for electronic novices to replicate! [Thoughtful! Friendly! ]
Later, I will design a SMD version, which is super mini! Battery-powered, it can be used as a pocket alarm clock.
 
The program code in the attachment
does not need to be modified, just burn it directly