不解释，需要的自己下
上传时间： 2013-12-29
上传用户：xiaoxiang
很好的东西
上传时间： 2013-10-07
上传用户：miaochun888
呵呵。
上传时间： 2013-10-31
上传用户：sy_jiadeyi
设计了一种基于PIC16C71单片机的数字水温配制阀。该配制阀采用NTC热敏电阻作温度传感器，与固定电阻组成简单分压电路作为水温测量电路，利用PIC16C71单片机内置的8位A/D转换器把热敏电阻上的模拟电压转换为数字量，PIC16C71单片机控制直流电机驱动混水阀调节冷热水的混合比例实现水温调节。给出了控制电路图，对水温测量电路的参数选择和测温精度作了详细讨论。实验和分析表明，选用阻值较大的NTC热敏电阻和分压电阻可较好地解决热敏电阻因功耗较大造成的热击穿问题。 Abstract: A digital valve for controlling water temperature based on PIC16C71 was presented in this paper.A bleeder circuit which consisted of a NTC thermistor as temperature sensor and a fixed resistance was designed as water temperature measuring circuit.The analog voltage on the thermistor was converted into digital signal by a 8-bit A/D converter embedded in PIC16C71. Based on the digital signal， the MCU PIC16C71 drived the valve by a DC motor to adjust the water temperature through adjusting the proportion of HOT water and cold water.The circuit diagram of controller was given，the principle，the component parameters and the accuracy of measuring temperatures were also dissertated in detail. It was found by experiment and analysis that thermal breakdown of thermistor caused by high power could be solved by selecting thermistor and fixed resistance with high impedance value.
上传时间： 2013-11-07
上传用户：Yue Zhong
电子发烧友网讯：想实时关注世界最hit最前沿技术科技动态？想了解最有价值国外电子设计资讯？想最先了解行业工程师设计的最HOT参考案例？请关注电子发烧友网推荐栏目——国外电子，基于此，为电子发烧友网读者奉上国外前沿技术大餐，电子发烧友网特整合推出《最受欢迎电子发烧友网国外电子精华集锦（4月）》，以飨读者。内容精彩，不容错过，请继续关注电子发烧友网后续系列报道。 1、美国FBI秘密跟踪器拆解：震撼的内部结构 这次要拆解的居然是美国联邦调查局FBI用的汽车追踪设备？如果你会很奇怪，这么机密的东西到底从来弄来的呢？其实，这是一位叫Karen Thaomas的女士无意间从她的汽车底下发现的。 该追踪设备包括了用于追踪汽车定位的GPS单元，一个RF发射器，主要用于将其位置发送到FBI，还有一组电池，用于设备电源驱动支持。我们不会光为了了解这些而忽略了视觉的享受吧？！现在就为你揭开FBI汽车追踪仪器的神秘面纱！ 上图中，顺时针方向依次为电池组、GPS天线、发射/接收单元和磁力安装支架
上传时间： 2013-10-27
上传用户：狗日的日子
One of the strengths of Synplify is the Finite State Machine compiler. This is a powerfulfeature that not only has the ability to automatically detect state machines in the sourcecode, and implement them with either sequential, gray, or one-HOT encoding. But alsoperform a reachability analysis to determine all the states that could possibly bereached, and optimize away all states and transition logic that can not be reached.Thus, producing a highly optimal final implementation of the state machine.
标签： Synplicity Machine Verilog Design
上传时间： 2013-10-20
上传用户：苍山观海
The ability to create groups of reports, and grant users access to reports by group. The ability to generate reports as PDF, XLS, HTML, and CSV files. The ability to generate bar, pie and xy charts for inclusion in reports. The ability to schedule and email PDF, XLS, and CSV reports. The ability to define reusable report parameters. Available parameter types include Date, Text, and Query Parameters. The ability to create multiple DataSources for use in generating reports. Support for JNDI DataSources and internal connection pooling via Commons-DBCP is included. The ability to upload and HOT deploy new reports. Web based administration of users, groups, reports, parameters, and datasources. Cross platform database support via Hibernate based persistence layer. Available in a preconfigured bundle with Apache Tomcat.
上传时间： 2014-01-14
上传用户：franktu
Digital Thermostat with High Accuracy -6,00 to 46,00 °C Digital Thermostat We build a digital thermostat for home applications, which controls the room temperature. I used the AT90S2313 microprocessor of ATMEL. The digital thermostat opens the main heating valve of the apartment and the HOT water flows in the radiators. Digital Thermostat Board
标签： Thermostat Digital Accuracy digital
上传时间： 2014-01-18
上传用户：D&L37
16 relay output channels and 16 isolated digital input channels LED indicators to show activated relays Jumper selectable Form A/Form B-type relay output channel Output status read-back Keep relay output values when HOT system reset High-voltage isolation on input channels(2,500 VDC) Hi ESD protection(2,00VDC) High over-voltage protection(70VDC) Wide input range(10~50VDC) Interrupt handling capability High-density DB-62 connector Board ID
标签： channels indicators activated isolated
上传时间： 2016-02-15
上传用户：dongbaobao
Programming PHP, Second Edition is the authoritative guide to PHP 5 and is filled with the unique knowledge of the creator of PHP (Rasmus Lerdorf) and other PHP experts. When it comes to creating web sites, the PHP scripting language is truly a red-HOT property. In fact, PHP is currently used on more than 19 million web sites, surpassing Microsoft s ASP .NET technology in popularity. Programmers love its flexibility and speed designers love its accessibility and convenience.
标签： authoritative Programming PHP the
上传时间： 2016-06-30
上传用户：qq1604324866
