# PCB_EMMC
1.给电脑装系统时发现自己缺U盘,刚好有多余的EMMC芯片。就画了个板子练手。发的PCB 原理图都有。
2.这次尝试制作了一个简单的红外循迹传感器,红外循迹传感器是专为轮式机器人设计的一款距离可调式避障传感器。其具有一对红外线发射与接收管,发射管发射出一定频率的红外线,当检测方向遇到障碍物(反射面)时,红外线反射回来被接收管接收,经过比较器电路处理之后,开关指示灯会亮起,同时信号输出接口输出数字信号(一个低电平信号),可通过电位器旋钮调节检测距离,有效距离范围2~30cm,工作电压为3.3V-5V,由于工作电压范围宽泛,在电源电压波动比较大的情况下仍能稳定工作,该传感器的探测距离可以通过电位器调节、具有干扰小、使用方便等特点,可以广泛应用于机器人避障、避障小车和黑白线循迹等众多场合。适合多种单片机、Arduino控制器、树莓派使用,安装到机器人上即可感测周围环境的变化。
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