超声波测距,包括有pcb原理图，用c写的程序，还有详细的说明

led显示屏幕中文移动广告显示牌，可用于车辆报站等；-led display screen in Chinese mobile advertising signs can be used to stop vehicles, etc.

P89V51RD2系列芯片是具有串口下载功能（ISP）和在KEIL中进行调试的功能（SOFTICE）。 新的芯片是ISP功能，通过FlashMagic 软件可以设置其为SOFTICE功能。 但要想回到ISP功能，则没有现成的好办法，只有通过编程器了。 但现在可以通过这个程序来恢复其ISP功能（禁止SOFTICE）。-P89V51RD2 series with the serial port chip is the ability to download (ISP) and the KEIL for debugging feature (SOFTICE). The new chip is the ISP, through FlashMagic software can be set to SOFTICE its function. However, to return to the ISP, there is no ready-made good, and that only through a programmer. But now through this procedure to restore its ISP (Prohibition SOFTICE).

是美信公司realtime芯片ds12887操作的详细原代码

利用51单片机控制1602读写，方便易懂实用-51??1602д ?? ??

温度的多机通讯，18b20的高级应用。实现了读写两个传感器-Temperature multi-machine communication, 18b20 advanced applications. Two sensors to achieve the reading and writing

本人非常支持单片机设计DIY 在这里再次献出小弟的一点心意,下面是使用AT89S52驱动74HC4015,实现1选择8的数据通道切换器,可以在不8个通道出加上不同大小的电阻.可以用来单声道音量的大小控制. 下面作品图是小弟设计的廉价的 基于单片机的毕业设计 ,它还使用了无线接收发送模块,通过使用手上的遥控器能控制音量的大小,还加了一块HCF4052用于输入音道的选择,支持思路音频信号的输入,一路音频信号的输出: -I very much support the single-chip design DIY here again gave a little boy s mind is to use the following AT89S52 drive 74HC4015, to achieve a choice of 8 switches the data channel, you can not add the 8-channel resistance of different sizes. Can used to the size of mono volume control. The following work plan is designed小弟cheap graduation based on single-chip design, it uses the wireless receiver send module, through the use of the hands of the remote control can control the volume size, but also Add a piece of HCF4052 Road for the importation of sound choices, to support the idea of audio signal input, the output audio signal all the way:

这是在KEIL环境下写的CAN源码，具有CANOPEN协议，学习参考的好东西哟！-This is in KEIL environment CAN write source code, with CANOpen agreement, a reference to learn good things yo!

51单片机读写usb移动硬盘。提供全套资料，原理图，固件源代码。-usb mass storage module

基于C8051F020及RA8806控制芯片的液晶驱动程序-Based on the C8051F020 and RA8806 LCD Controller Driver

FM25040的C51驱动程序，用于掉电保存数据。-FM25040 the C51 driver, save the data for the brown-out.