[Lichuang Development Board] Liu's Smart Car

## Circuit design

master control
! [Master control.png] LED light
! [QQ screenshot 20230218102602.png] R/L is the left and right direction lights, S/M is the mode light

Bluetooth module
! [QQ screenshot 20230218102611.png] Here is the Bluetooth input Choose according to the requirements of the module. If H05, it is recommended to choose 5v because its working voltage is at least 3.6v. In this design, 3.3v was chosen, so a line of
ultrasonic module flew :
![QQ screenshot 20230218102619.png] adc detection module
! [QQ screenshot 20230218102649.png] Tracking module
! [QQ screenshot 20230218102708.png] Power module
! [QQ screenshot 20230218102725.png] The power supply here is a 7.4v rechargeable lithium battery. Since it is not available, a small power bank is used to replace

the buzzer
! [QQ screenshot 20230218102733.png] The input voltage of the buzzer here should be 3.3v. In this project, the buzzer kept sounding due to the input of 5v, so the buzzer

motor module was removed

! [QQ screenshot 20230218102746.png] Button module
! [ QQ screenshot 20230218102756.png] Remote control module: (for subsequent improvement)
![QQ screenshot 20230218102806.png] Schematic diagram:
![SCH_[Lichuang Development Board] Liu's Smart Car_0-P1_2023-02-18.png ]
## Functional implementation of

Bluetooth:
based on [http://app.gzjkw.net/](http://app.gzjkw.net/%E8%BF%99%E4%B8%AA%E7%BD%91% E7%AB%99%EF%BC%8C%E7%AB%8B%E5%88%9Bb%E7%AB%99%E6%9C%89%E6%95%99%E7%A8%8B%EF% BC%8C%E9%9D%9E%E5%B8%B8%E5%A5%BD%E5%AD%A6%EF%BC%8C%E4%B8%8A%E6%89%8B%E5%BE% 88%E5%BF%AB%E3%80%82) website, Lichuang B station has teaching
! [QQ screenshot 20230218104706.png] There is no problem with the tracking and ultrasonic obstacle avoidance circuit , but due to venue reasons, the Bluetooth remote control code
has not been actually verified
Rewritten using official code

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