控制小车例程。运行程序进入主界面，点击相应按钮控制小车。其中有控制小车的前进、后退、左拐、右拐、停止、循迹和设置小车速度的功能。-Control car routine. Run the program into the main interface, click on the appropriate button to control the car. Which control the car forward, backward, turn left, turn right, stop, a

熊猫看书可以自动滚屏但是没有滚速设置，带有书签功能。可以实现字体的动态设置，实现了在应用内控制屏幕亮度的功能，可以设置多种背景颜色和字体颜色。-Panda book can automatically roll screen but no roll speed settings, with a bookmark function. Can achieve the dynamic font settings, to achieve the application of the screen bri

利用角度传感器在经过PWM来控制风扇的速度，来达到预定值。(The angle sensor is used to control the fan speed through the PWM to achieve the desired value.)