凌阳超声波模组的资料v2.0,包括两种距离的实例源码，电路原理图、产品说明书和使用说明书。-Sunplus ultrasound data module v2.0, includes two examples from the source code, circuit schematics, product brochures and instruction manuals.

EM3+V2.2开发板原理图,包含继电器、蜂鸣器、独立按键、动态数码管、五线四相进步电机等硬件示例(EM3+V2.2 development board schematic diagram, including relay, buzzer, independent button, dynamic digital tube, five line four phase progressive motor hardware example.)