本文介紹了基于AT89C52 單片機的自動水溫控制系統的設計及實現過程。該系統具有實時顯示、溫度測量、溫度設定并能根據設定值對環境溫度進行調節實現控溫的目的以及達到上下限溫度報警功能，控制算法是基于數字PID 算法。關鍵詞 ：PID AT89C52 脈寬調制 實時 Abstract ： This Article describes AT89C52 single-chip microcomputer-basedautomatic water temperature control system design and implementation process. Thesystem has real-time display, temperature measurement, temperature settings and theenvironment in accordance with the temperature settings adjusted to achieve thepurpose of temperature control and reach the upper and lower limits of temperaturealarm function, the control algorithm is based on the digital PID algorithm.Keyword: PID AT89C52 PWM real time
上傳時間： 2013-10-10
上傳用戶：歸海惜雪
根據看門狗電路的原理，設計出簡單適用、性能可靠的1TrL型看門狗電路以及價格低廉、性能可靠的微功耗CMOS型看門狗電路，同時還介紹了常用的uP監視器O型看門狗電路。關鍵詞：看門狗電路；1TrL型；CMOS型Abstract：In accordance with the principle of WDT (Watch Dog Timer 1circuit，design a，IT．L type WTD circuit，it is a dimple an d applicable an d reliable on performanceo Design a CMOS type WTD circuit，it is low prices and mini-power consumption。Also the Article describes a common uP type WTD circuit。Key word：WDT circuit；TFL type；CMOS typ e
上傳時間： 2013-11-05
上傳用戶：685
This Article has been contributed to the TI Developer Wiki. To see the most recently updated version or tocontribute, visit this topic at:
上傳時間： 2013-11-04
上傳用戶：釣鰲牧馬
This Article describes the procedure to configure and program EXAR Corporation’s PowerXR Digital Power devicesvia I2C interface. Details shown here apply to XRP7704/08/40 and XRP7713/14 devices and PowerArchitectsoftware version 3.00.
上傳時間： 2013-10-20
上傳用戶：tianyi223
多遠程二極管溫度傳感器-Design Considerations for pc thermal management Multiple RDTS (remote diode temperature sensing) provides the most accurate method of sensing an IC’s junction temperature. It overcomes thermal gradient and placement issues encountered when trying to place external sensors. PCB component count decreases when using a device that provides multiple inputs.Better temperature sensing improves product performance and reliability. Disk drive data integrity suffers at elevated temperatures. IBM published an Article stating that a 5°C rise in operating temperature causes a 15% increase in the drive’s failure rate. The overall performance of a system can be improved by providing a more accurate temperature measurement of the most critical devices allowing them to run just a few degrees hotter.The LM83 directly senses its own temperature and the temperature of three external PN junctions. One is dedicated to the CPU of choice, the other two go to other parts of your system that need thermal monitoring such as the disk drive or graphics chip. The SMBus-compatible LM83 supports SMBus timeout and logic levels. The LM83 has two interrupt outputs; one for user-programmable limits and WATCHDOG capability (INT), the other is a Critical Temperature Alarm output (T_CRIT_A) for system power supply shutdown.
標簽： Considerat Design 遠程 二極管
上傳時間： 2014-12-21
上傳用戶：ljd123456
Abstract: This Article explains the recent trend in heart-rate and fitness monitors to go wireless toeliminate cables to allow free movement, and allow convenient data collection without the need to plug intheir devices. It details a typical wireless system, using the MAX1472 crystal-referenced phase-lockedloop (PLL) VHF/UHF transmitter.
標簽： Heart-RateFitness Monitors Wireless Go
上傳時間： 2013-11-11
上傳用戶：xiaowei314
Abstract: This Article describes the Antenna Interface Standards Group (AISG) standard in telecommunications and details itshardware implementation. It explains how a fully integrated transceiver such as the MAX9947 can help reduce space and cost, andsolve bus arbitrations in base-station tower equipment.
上傳時間： 2014-12-30
上傳用戶：wangchong
Abstract: This Article discusses the benefits of a G3-PLC-based automation system and presents a real-world example of a systemfor reducing energy usage and lowering maintenance costs in tunnels. The basic system design is explained and key performance
上傳時間： 2013-10-29
上傳用戶：康郎
Abstract: Engineers often wish that radio susceptibility (RS) or radio immunity could be cured with an antibiotic, a vaccine, or someform of cure-all. Unfortunately, solving the RS problem is not that easy. Indeed, the laws of physics apply. In this Article we discusssources of RS. We also offer tips and hints to protect systems, power supplies, printed circuit boards (PCBs), and electroniccomponents from radio frequency interference.
標簽： Susceptibility Radio 無線電干擾
上傳時間： 2014-12-30
上傳用戶：旗魚旗魚
針對UHF讀寫器設計中，在符合EPC Gen2標準的情況下，對標簽返回的高速數據進行正確解碼以達到正確讀取標簽的要求，提出了一種新的在ARM平臺下采用邊沿捕獲統計定時器數判斷數據的方法，并對FM0編碼進行解碼。與傳統的使用定時器定時采樣高低電平的FM0解碼方法相比，該解碼方法可以減少定時器定時誤差累積的影響；可以將捕獲定時器數中斷與數據判斷解碼相對分隔開，使得中斷對解碼影響很小，實現捕獲與解碼的同步。通過實驗表明，這種方法提高了解碼的效率，在160 Kb/s的接收速度下，讀取一張標簽的時間約為30次/s。 Abstract: Aiming at the requirement of receiving correctly decoded data from the tag under high-speed communication which complied with EPC Gen2 standard in the design of UHF interrogator， the Article introduced a new technology for FM0 decoding which counted the timer counter to judge data by using the edge interval of signal capture based on the ARM7 platform. Compared with the traditional FM0 decoding method which used the timer timed to sample the high and low level， the method could reduce the accumulation of timing error and could relatively separate capture timer interrupt and the data judgment for decoding， so that the disruption effect on the decoding was small and realizd synchronization of capture and decoding. Testing result shows that the method improves the efficiency of decoding， at 160 Kb/s receiving speed， the time of the interrogator to read a tag is about 30 times/s.
上傳時間： 2013-11-10
上傳用戶：liufei
