基于51单片机的L298n的循迹pwm+正反转调速(Pwm+ reversible speed tracking)

51单片机，循迹，液晶显示超声波测距距离，小于30cm停车，但循迹比较鬼畜，需要根据硬件情况自行调整PWM控制(Tracking, ultrasonic, liquid crystal, 51 single chip)

实现步进电机的正反转 三个步进电机与限位开关(Positive and reverse of stepping motor)

锦锐51触摸单片机，可以做触摸圆环，新一代流行的触摸芯片，多PWM，比较灵活来做各类产品，小家电的，大家可以看(CA touch microcontroller, you can do touch ring, a new generation of popular touch chip, multi PWM, more flexible to do all kinds of products, small appliances, you can see)