文章提出了一種基于AT89S51單片機(jī)的智能家居系統(tǒng)的設(shè)計(jì),該系統(tǒng)具有室內(nèi)煤氣以及煙霧的檢測(cè)、家庭室內(nèi)防盜等功能。文章詳細(xì)分析了系統(tǒng)的總體設(shè)計(jì),詳盡分析并設(shè)計(jì)了煤氣傳感器模塊、煙霧傳感器模塊、人體紅外感應(yīng)傳感器模塊、報(bào)警模塊等各硬件部分,并利用PROTUES軟件進(jìn)行了系統(tǒng)仿真。仿真結(jié)果證明:系統(tǒng)具有成本低、效率高、操作方便等優(yōu)點(diǎn),達(dá)到了預(yù)期設(shè)計(jì)的效果。This paper presents the design of an intelligent home system based on AT89S51 microcontroller.The system has the functions of detecting indoor gas and smoke,guarding against theft in the home,and so on.The overall design of the system is analyzed in detail.The gas sensor module,smoke sensor module,human infrared sensor module,alarm module and other hardware parts are analyzed and designed in detail,and the system simulation is carried out using PROTUES software.The simulation results show that the system has the advantages of low cost,high efficiency,convenient operation and so on,and achieves the expected design effect.
上傳時(shí)間： 2022-03-28
上傳用戶：
為設(shè)計(jì)高效率、低損耗的PFC電路,本文基于UCC28019進(jìn)行電路設(shè)計(jì)。以UCC28019輸出的PWM波形來控制Boost升壓斬波為核心電路,使電路中的電容交替地充放電、電感交替的儲(chǔ)存和釋放能量,最后實(shí)現(xiàn)在輸入AC20V~24V電壓情況下穩(wěn)定輸出DC38V。測(cè)試結(jié)果表明,系統(tǒng)實(shí)現(xiàn)效率為95%左右,電壓調(diào)整率小于1%,電源功率因數(shù)0.99。交流輸入電壓為19.0-25.8 V時(shí),輸出直流電壓穩(wěn)定性較好,電感無明顯嘯叫且紋波小,具有一定的帶負(fù)載能力和實(shí)用性。In order to design the PFC circuit with high efficiency and low loss,this paper designs the circuit based on UCC28019.The PWM waveform output by UCC28019 is used to control boost chopper as the core circuit,which alternately charges and discharges capacitors,stores and releases energy by inductors,and finally achieves stable output of DC38 V under the input voltage of AC20 V~24 V.The test results show that the system achieves about 95% efficiency,the voltage adjustment rate is less than 1%,the power factor is 0.99,and the AC input voltage is 19.0-25.8 V.The output DC voltage stability is good,the inductance has no obvious whistle and the ripple is small,so it has certain load capacity and practicability.
標(biāo)簽： ucc28019 pfc 電路設(shè)計(jì)
上傳時(shí)間： 2022-04-03
上傳用戶：
本文首次設(shè)計(jì)并驗(yàn)證了基于macom三合一芯片設(shè)計(jì)的光模塊電路,該電路旨在提供一種滿足SFF-8472中規(guī)定的數(shù)字診斷功能的低成本SFP+模塊。電路采用激光器驅(qū)動(dòng)、限幅放大器、控制器以及時(shí)鐘恢復(fù)單元集成的單芯片,在保證高精度數(shù)字診斷功能基礎(chǔ)上,實(shí)現(xiàn)了低成本高可靠的特點(diǎn)。該電路在光接收接口組件與激光器驅(qū)動(dòng)和限幅放大器單元的限幅放大器部分之間接入濾波器來提高模塊的靈敏度及信號(hào)質(zhì)量。在控制器單元的數(shù)字電位器的引腳上采用外加電阻的方式避免出現(xiàn)上電不發(fā)光的故障問題。該研究結(jié)果為下一代SFP-DD光模塊設(shè)計(jì)與開發(fā)工作,奠定了一定的理論與實(shí)踐基礎(chǔ)。This paper designs and validates the optical module circuit based on the MACOM Trinity chip for the first time.This circuit aims to provide a low-cost SFP module which meets the digital diagnosis function specified in SFF-8472.The circuit uses a single chip integrated with laser driver,limiting amplifier,controller and clock recovery unit.On the basis of ensuring high precision digital diagnosis function,it achieves the characteristics of low cost and high reliability.The circuit connects a filter between the optical receiving interface module and the limiting amplifier part of the laser driver and limiting amplifier unit to improve the sensitivity and signal quality of the module.The pin of the digital potentiometer in the controller unit is equipped with an external resistance to avoid the problem of power failure.The research results lay a theoretical and practical foundation for optical module design in high-speed data center.
上傳時(shí)間： 2022-04-03
上傳用戶：
本文設(shè)計(jì)了一種磁致伸縮位移傳感器,介紹了該磁致伸縮位移傳感器的測(cè)量原理,通過結(jié)構(gòu)優(yōu)化設(shè)計(jì)提高了儀器的性能,詳述了硬件電路設(shè)計(jì)及實(shí)現(xiàn)方法,完成了軟件設(shè)計(jì),實(shí)現(xiàn)了高壓充電、問詢脈沖加載、時(shí)間測(cè)量及濾波等功能,并通過實(shí)驗(yàn)對(duì)其性能進(jìn)行了驗(yàn)證。所研制的磁致伸縮位移傳感器具有測(cè)量精度高、長(zhǎng)期穩(wěn)定性好等特點(diǎn),滿足了大量程、高精度、惡劣環(huán)境等測(cè)量的要求。A kind of sensor based on magnetostrictive principle is designed.The measuring principle of the magnetostrictive displacement sensor is introduced,the performance of the instrument is improved by the structural optimization design,and introduced the hardware circuit design and the realization method,completed the software design,realized the functions of the high voltage charging,inquiries pulse loading,time measurement and filtering,and its performance is verified through the experiment.The magnetostrictive displacement sensor has the characteristics of high measuring precision.The sensor meets the requirements of large range,high precision,poor environment and so on.
標(biāo)簽： 位移傳感器
上傳時(shí)間： 2022-04-06
上傳用戶：
高通藍(lán)牙芯片QCC5144 詳細(xì)規(guī)格手冊(cè)datasheet （共99頁）含各個(gè)接口說明，應(yīng)用原理圖等信息。 QualcommTrueWireless? stereo earbuds (無線雙耳） Features（特點(diǎn)） ■ Qualifiedto Bluetooth v5.2 specification （藍(lán)牙協(xié)議標(biāo)準(zhǔn)5.2） ■ 120 MHz Qualcomm ? Kalimba ? audio DSP （120MHz 的音頻DSP處理器） ■ 32 MHz/80MHz Developer Processor for applications ■ Firmware Processor for system ■ Flexible QSPI flash programmable platform （可編程的QSPI外掛存儲(chǔ)器） ■ High-performance 24?bit audio interface （高性能的24位音頻接口） ■ Digital and analog microphone interfaces （含 數(shù)字 及模擬 MIC接口） ■ Flexible PIO controller and LED pins with PWM support ■ Serial interfaces: UART, Bit Serializer (I2C/SPI), USB 2.0 （支持串口，I2C， SPI，USB 接口） ■ Advanced audio algorithms （高級(jí)的音頻算法） ■ ActiveNoise Cancellation: （支持ANC 主動(dòng)降噪功能） Hybrid, Feedforward, and Feedback modes, using Digital or Analog Mics, enabled using license keys available from Qualcomm? ■ Qualcomm ? aptX ? and aptX HD Audio （支持獨(dú)特的aptx 功能）
上傳時(shí)間： 2022-04-07
上傳用戶：
高通藍(lán)牙芯片QCC3040 詳細(xì)規(guī)格手冊(cè)datasheet （共96頁）QualcommTrueWireless? stereo earbuds (無線雙耳）Features（特點(diǎn)）■ Qualifiedto Bluetooth v5.2 specification （藍(lán)牙協(xié)議標(biāo)準(zhǔn)5.2）■ 120 MHz Qualcomm ? Kalimba ? audio DSP （120MHz 的音頻DSP處理器）■ 32 MHz Developer Processor for applications （32MH的 應(yīng)用處理器）■ Firmware Processor for system■ Flexible QSPI flash programmable platform （可編程的QSPI外掛存儲(chǔ)器）■ High-performance 24?bit audio interface （高性能的24位音頻接口）■ Digital and analog microphone interfaces （含 數(shù)字 及模擬 MIC接口）■ Flexible PIO controller and LED pins with PWM support■ Serial interfaces: UART, Bit Serializer (I2C/SPI), USB 2.0 （支持串口，I2C， SPI，USB 接口）■ Advanced audio algorithms （高級(jí)的音頻算法）■ ActiveNoise Cancellation: （支持ANC 主動(dòng)降噪功能）Hybrid, Feedforward, and Feedback modes, using Digitalor Analog Mics, enabled using license keys available from Qualcomm?■ Qualcomm ? aptX ? and aptX HD Audio （支持獨(dú)特的aptx 功能）
上傳時(shí)間： 2022-04-09
上傳用戶：slq1234567890
隨著電磁閥在工業(yè)和日常應(yīng)用的增多,其功耗越來越被人們所重視。通過對(duì)電磁閥驅(qū)動(dòng)電路的研究,設(shè)計(jì)一套電磁閥節(jié)能驅(qū)動(dòng)電路。不僅提高了電磁閥的響應(yīng)時(shí)間,更重要的是降低了功耗,使電磁閥由工作在大電流狀態(tài)下,變成大電流啟動(dòng)小電流維持的工作狀態(tài)。減少了由電流過大引起的電磁閥線圈過熱,增加了電磁閥的安全性。The power consumption of an electromagnetic valve is drawing increasingly more attentiori as it is widely used in industrial production and daily life. In this study, an energy - saving driving circuit of electromagnetic valves was designed. It can make an electromagnetic valve to start with a high current while work with a low current; thereby the power consumption can be reduced. Besides, it can shorten the response time of an electromagnetic valve and improve the security of the valve.
標(biāo)簽： 電磁閥 節(jié)能驅(qū)動(dòng)電路
上傳時(shí)間： 2022-04-16
上傳用戶：
HC-SR501 High Sensitivity Human Infrared Sensor Module Pyroelectric PCB.doc人體紅外感應(yīng)原理圖
標(biāo)簽： 紅外感應(yīng)
上傳時(shí)間： 2022-04-18
上傳用戶：
Springer模擬電路設(shè)計(jì)叢書，《清華版雙語教學(xué)用書·模擬集成電路設(shè)計(jì)精粹》作者首先對(duì)MOST和BJT兩種器件模型進(jìn)行了分析和比較，然后以此為兩條線索，分別介紹了相應(yīng)的基本單元電路和各類放大器的詳細(xì)分析，隨后的章節(jié)分別研究噪聲、失真、濾波器、ADC／DAC和振蕩器電路，每一章都結(jié)合MOST和BJT兩種類型電路進(jìn)行分析比較。《清華版雙語教學(xué)用書·模擬集成電路設(shè)計(jì)精粹》一方面?zhèn)戎赜诨A(chǔ)知識(shí)，對(duì)模擬和混合信號(hào)集成電路中的許多重要概念以直觀形象的語言進(jìn)行了描述。另一方面又側(cè)重介紹與現(xiàn)代集成電路工藝相關(guān)的最新電路的研究方向和熱點(diǎn)。Next-Generation ADCs, High-Performance Power Management, and Technology Considerations for Advanced Integrated Circuits
上傳時(shí)間： 2022-04-19
上傳用戶：
HDMI-Definition Multimedia Interface Specification Version 2.0This document constitutes the Version 2.0 specification for the High-Definition Multimedia Interface (HDMI Specification Version 2.0). This Specification incorporates HDMI Specification Version 1.4b by reference and defines additional and improved functionality. Mechanical, behavioral, and protocol requirements necessary for compliance are described for Sources, Sinks, Repeaters, and Cables.
標(biāo)簽： hdmi
上傳時(shí)間： 2022-04-22
上傳用戶：
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