IC卡购电软件实现，可以参考代码的源程序

一个C编的通信程序原代码-a series of the C source code Communication Program

51系列单片机的IIC软件包，模拟通信软件包，可以和具有IIC的芯片使用-51 Series MCU IIC package, analog communications package, you can chip and the use of IIC

凌阳公司的光敏电阻传感器源代码，代码中注有非常详细的代码功能注释。-Sunplus

Hardware_PCB_Interface，硬件pcb 接口-Hardware_PCB_Interface, hardware interface pcb

由于输出的是方波，比较难听:-) 只能说是非常难听:-)为什么呢？只因为输出的是方波,包含了大量的奇次谐波。 你可以用双龙的"虚拟仪器"分别产生正弦波、三角波和方波听一下，正弦波感 觉就比较纯正，而方波则要多难听有多难听！-As the output is a square wave, more bluntly :-) can only say that it is very nasty :-) Why? Simply because the output is square wave, including a large number of odd harmonics. You can use Shuanglong

用AT89C51制作的99秒跑马表，适合初学者学习单片机-AT89C51 produced with 99 seconds Happy tables, suitable for beginners to learn single-chip

本程序实现通过BDM方式访问MOTOROLA 9S12单片机EEPROM，可自动配置波特率，包含读、写、擦除三种功能。-This procedure, through BDM realize MOTOROLA 9S12 Singlechip access EEPROM, can automatically configure the baud rate, including reading, writing, erasing three functions.

51bote 单片机波特率设计助手-Single-chip baud rate 51bote Design Assistant

MAX7219+DS1302+74LS245数字钟,内附PROTEUS图！实物以通过-MAX7219+ DS1302+74 LS245 digital clock, enclosing PROTEUS map! In-kind through

74HC595在数码管上的详细应用和编程方法-74HC595 in the digital control on the detailed application and programming method