IC电话卡原理 详细介绍各类IC电话卡硬件结构，读写时序，数据存储格式 附通过电脑并口（打印机口）操作IC电话卡的读/写电路，及对应例程 电路元件列表：电阻7个，NPN三极管1个，PNP三极管1个，1N4148二极管13个，如没有IC卡座可以直接焊到触点上。-The principle of IC telephone card details the hardware structure of the various types of IC phone card, read and

NPN silicon planar epitaxial transistor encapsulated in a SOT223 surface mounted envelope and designed primarily for use in hand-held radio equipment in the 470 MHz communications band.

NPN silicon planar epitaxial transistor encapsulated in a SOT223 surface mounted envelope and designed primarily for use in hand-held radio equipment in the 470 MHz communications band.