51 smart desk lamp

Project functions
1. 51 microcontroller master control, intelligently detects whether there is someone in front, turns on the light when there is someone, and turns off the light when no one is there
2. Press the button to freely switch between yellow and white lights
3. Press the button and there will be a buzzer sound.
Main module use
1. Minimum system of 51 microcontroller
2. hc——sr04 ultrasonic module
3. Active buzzer
 
Tips: Analyze and explain the entire question or the main part of the question
 
Tips: Overall design scheme block diagram column: Schematic design instructions
PCB design instructions
In order to make it easier to see clearly, I have hidden the display of the copper area.
Software Description
1. Ultrasonic module
2. Timer module
Buzzer module:
Main function (logic)


Physical display instructions
Notes
1. Search the Internet for ultrasonic information yourself Routines (there are quite a few on csdn), as well as how to use ultrasonic waves
2. Complete the basic circuit structure of the 51 microcontroller
3. Then change the gear position and color of the LED lights according to your own preferences
4. You can also expand more functions by yourself. There are so many IO port
demonstration videos
attached to the 51. The complete video is not uploaded. It demonstrates the switching of lights and gear selection. If you want to
upload other attachments
and want complete information, you can send me a private message dd