vumat

介绍如何简单可靠而方便测量 4～20mA 信号的文章。许多仪器仪表在远距离传送信号时，都有可能采取 4～20mA 的方式进行传送。本文对使用运算放大器或者不用运算放大器的场合都有介绍。给出了接口电阻的计算方法以及调整4mA＝零点，20mA＝满度的详细说明。并附有局部连接的原理图。(How simple, reliable and convenient measurement of 4 ~ 20mA signal article. Many instruments in the long-distance signal transmission, may take 4 ~ 20mA way transmission. In this paper, an operational amplifier or op amp do not have a description occasions. Shows the calculation of the interface resistance and adjust the 4mA = zero, 20mA = full scale details. Local connections together with the schematic.)

无线传感器网络 tinyos 睡眠协议代码(Wireless sensor networks tinyos cluster head selection code)

该程序是电源控制自动化系统： 主要功能：开机检测ac_ct（模拟信号） 和pfc_ct(模拟信号) 正常时,设置模拟信号参数，打开PFC_ON,继电器打开，正常运行中检测温度，风扇的状态，任何一个出现异常就进入保护状态。(Power supply control system)

将每2片74595做级联，然后再将级联之后的所有时钟线与数据再并联在一起最后对每一组的锁存控制线做单独控制.(Application to do a project, the more I/O, applied to the 74,595 to do the extension, but you want to mount multi-chip 74595, is bound to have a lot to use the I/O port, in order to solve this problem, I will be every 2 sheet 74595 do cascade, and then cascade after all the clock line and the data in parallel and then together (i.e., all 74595 communal clock and data lines, it only occupies two I/O port lines) Finally, for each group latch control lines do individually controlled (equivalent to Chip Select), so that a hardware circuit by a great degree of simplification, both procedures can also share a driving subroutine 74595, to control the type of lock inventory control line, serial data is sent to the port 74595 cascade module. As a result of the hardware and software have a large degree of optimization.)

vb驱动控制器源代码就这样啦 具体自己看吧(vb drive controller source code)

通过单片机AT89C2051采用DS1820上的温度,并通过串口发出(The temperature on DS1820 is adopted by AT89C2051 single chip computer and sent out through serial port.)

关于单片机的芯片手册，希望对大家有用，尤其是初次接触这款芯片的(About the chip Manual of single chip computer, I hope it will be useful to you all.)

一个单片机开发实例，可以用开发板实现点阵的规律闪烁发光(A microcontroller development example, you can use the law of the development board to achieve lattice twinkling)

MSP430G2553单片机与LCD1602显示模块和4x4矩阵键盘实现的电子秤控制系统（无AD数据采集部分） (MSP430G2553 SCM and LCD1602 4x4 matrix display module and electronic scales keyboard control system implemented (no AD data acquisition section))

代码说明： 需要建立汽车模型的朋友请看看吧！这么长了还短 垃圾网站 (Need to build car model friends look out! )