集成了所有的protel99se PCB库文件

RP1、R2、R3、R4、VT1组成可调恒流源（VT1为达林顿晶体管），调节RP1可使充电电流从0到1A连续变化。R6、RP2、R7、C2、VT2和J组成电压检测电路，在充电过程中当电池电压升至设定值时，VT2饱和导通，J得电吸合，触点JK；转换位置，使VT1失去偏压而截止，绿光LED亮，指示已充满电。

电子密码锁-带源程序电路图和pcb.rar

Altium Designer AD 封装库 常用线路板PCB库 带3D模型 ssop芯片封装库 常用封装

cadence16.2 PCB入门中文教程

Preface Printed Circuit Board Design Techniques for EMC Compliance: A Handbook for Designers, Second Edition, is a significant enhancement to the first edition. The first edition was well received within the engineering community worldwide and was translated into international languages. The intent of the present volume is to expand upon concepts presented in the earlier edition, to justify why a specific design technique works, and to show when it is appropriate for use. Additional techniques based on technological changes within the last few years are also incorporated. These techniques and enhancements are based on questions, comments, and discussions received from engineers around the world. This book presents information never before published within the engineering community, dealing exclusively with printed circuit boards (PCBs). When writing the first edition, it was impossible to anticipate the amount of variations possible, or what the intended audience expected from a book directed toward nondegreed engineers. A thorough understanding of the concepts presented herein will assist during the design and layout process. Note the key word here —"concepts." Printed Circuit Board Design Techniques for EMC Compliance will help minimize the emission or reception of unwanted radio frequency (RF) energy generated by components and circuits, thus achieving acceptable levels of electromagnetic compatibility (EMC) for electrical equipment. The field of EMC consists of two distinct areas: 1. Emissions: Propagation of electromagnetic interference (EMI) from noncompliant devices (culprits) and, in particular, radiated and conducted electromagnetic interference. 2. Susceptibility or immunity: The detrimental effects on susceptible devices (victims) in forms that include EMI, electrostatic discharge (ESD), and electrical overstress (EOS). The primary goal of the engineer is to ensure proper operation and performance of a product when used within an intended electromagnetic environment. These design requirements are in addition to making a product function as desired for use within a specific, end-use environment. Information presented in this guideline is intended for those who design and layout printed circuit boards. EMC and compliance engineers will also find the information presented herein helpful in solving design problems at both the PCB and system level. This book can be used as a reference document for any design project. The focus of this book is strictly on the PCB. Containment techniques (shielding), internal and external cabling, power supply design, and other system-level subassemblies that use PCBs as a subcomponent will not be discussed. Again, as in the first edition, excellent reference material on these aspects of EMC system-level engineering is listed in the References section at the ends of chapters.

柔性电路板或者软硬结合板的制造文件 在上一期关于软硬结合印刷电路板的博客中，我谈到了制板商制造柔性板的典型工艺流程。了解制造工艺，对于设计软硬结合板或者柔性电路板是十分重要的。同时，它也告诉你成功地制造设计的板子所提供的数据。如果你还没有阅读过该系列博客的第1部分和第2部分，赶紧在这里和这里阅读，然后继续下文。 制造文件 让我们来谈谈制造文件，它们非常重要。我们是通过制造文件告诉生产商我们想要什么的，然而它们也是造成理解错误或者失误，而导致高昂代价的延误的重要因素。幸运的是，我们可以参考一些标准，来确保我们与制造厂之间沟通无碍，尤其是IPC

mac A1466 820-3437-B 2013版 原厂图纸 维修图纸,希望能给维修人员一个帮助

该项目设计是一种具有旋转方向和旋转速度并能够反馈数据的机械增量式旋转编码器。 它有标准的 Grove 接口，可以节省大量的布线和编程工作。 而且，它适应了高负荷和恶劣的环境。 该产品可用作玩具，机器人和消费者输入设备。 旋转编码器特性: 能够适用于不同的环境。 适应高负荷和恶劣环境。 具有良好的制动性能。 标准 Grove 接口，便于编程和接线。 准确可靠。 旋转编码器规格参数: 项目最小值标准值最大值 工作电压 (V)3.35.5 工作电流 (mA)1013 效率（恒速）50% 相位差（恒速）π/4 每圈脉冲12 旋转编码器硬件概览: 附件资料截图:

压铸脱模剂配比机电路图，有详细的配置情况以及电路图元器件，还有相应的电路图，功能以及设备的操作原理动作原理