3M Actel Agilent Technologies Allegro MicroSystems Alpha Microelectronics Altera AMCC AMP Amphenol Analog Devices Antenna Factor Antenova Astron Technology Atmel Attend Avago Bitwise Systems Bulgin Burr-Brown C&K Components C-MAC MicroTechnology Chin Nan Precision Electronics Cirrus Logic Cliff Electronic Components Contact Technology Cooper Bussman Coiltronics Cypress Dallas Semiconductor Device Sheets Digi International ECS Elantec EPCOS Fairchild Semiconductor Freescale Semiconductor FTDI Generalplus Technology Gennum Harris Suppression HARTING Hirose Electric Hitachi Semiconductor Holtek Semiconductor IL Switch Infineon Integrated Device Technology International Rectifier Intersil Johanson Technology KEMET Electronics Keystone Electronics King Billion Electronics Kingfont Kitagawa Kobiconn Kycon Lattice Linear Technology Lumberg Maxim Micrel Microchip Micron Technology Molex Morethanall Motorola National Semiconductor NEC Newport Components NXP Oki Semiconductor OMRON ON Semiconductor OSRAM Opto Semiconductors Panasonic PCB Philips print.bat Projects Unlimited QuickLogic Raltron Electronics Renesas Technology RF MicroDevices Samsung Samtec Sansen Technology SHARP Sonix Technology Spansion ST Microelectronics Sunplus Technology Sunridge Corporation Susumu Suyin Corporation Teccor Electronics Technik Industrial Telit Communications Texas Instruments Toshiba Vishay Vitesse Semiconductor Western Digital Wieson Technologies Winbond Electronics Xilinx Zarlink Semiconductor Zetex Zilog

STM32官方开发板原理图和PCB，PROTELL和AD可打开

220V转5V供电带按键功能的AT89S51单片机最小系统原理图和PCB文件

max232通信电路原理图和PCB串口电路原理图和PCB单片机下载线原理图和PCB

300MHZ无线发射遥控电路原理图和PCB

NE555延时关灯原理图和PCB文件555按键按下灯亮一会就自动灭了原理图和PCB文件

51单片机温度采集系统原理图和PCB文件

51单片机最小系统AD转换串口通信马达驱动蜂鸣器报警数码管显示按键控制220V转5V电源原理图和PCB

51单片机最小系统光耦隔离霍尔开关电机控制电路原理图和PCB

2051最小系统按键电路流水灯电路原理图和PCB