SIM卡PCB封装1.rar包含sim卡的2种封装文件，做tc35远程通信的朋友可以直接应用啦-PCB packaging SIM card sim card 1.rar contains two kinds of packaging papers, so TC35 friends telematics can be applied directly啦

简单实用的51仿真机PCB版图，按元件标识购买可自制，单片机需选用STC支持串口下载的芯片。支持Keil下在线仿真！-51 Simple and Practical Simulator PCB layout, component identification by the purchase can be made, single-chip to be selected to support the serial download STC chips. Supported under Keil o

sim900 protel library

PCB reference for sim 900. matching circuit for antennaes. pcb design reference