M.NT68676.2A is a monitor control board, which is suitable for Asia-Pacific market. It can supportLED/LCD panels which resolution is up to 2048×1152.M.NT68676.2A can synchronize with computer automatically. Synchronization requires thesynchronous signal which horizontal and vertical sync are separated.M.NT68676.2A can support dynamic contrast control, headphone INPUT and Digital volume controlsimultaneously.
標(biāo)簽： 樂華驅(qū)動(dòng)板
上傳時(shí)間： 2022-03-13
上傳用戶：kent
能源短缺和環(huán)境惡化是人類共同面臨的挑戰(zhàn)。開發(fā)新型清潔能源是解決能源短缺和環(huán)境惡化的捷徑，但是太陽能能源不連續(xù)和不穩(wěn)定的缺點(diǎn)影響其單獨(dú)使用的效果。為了解決這個(gè)問題，可以選擇使用多種性質(zhì)互補(bǔ)的能源聯(lián)合供電，相互彌補(bǔ)彼此的不足，以達(dá)到連續(xù)穩(wěn)定的電能輸出。基于雙輸入直流變換器（Multipk-INPUT Converter，MC）的光電互補(bǔ)系統(tǒng)相對(duì)于風(fēng)光互補(bǔ)系統(tǒng)而言，在太陽能功率充足時(shí)，可以選擇將多余的能量進(jìn)行并網(wǎng)，省去了蕃電池等儲(chǔ)能設(shè)備，也可大大節(jié)約成本，簡(jiǎn)化控制：而且電網(wǎng)是全天候的，比純新能源聯(lián)合系統(tǒng)更加可靠。因此本文將對(duì)光電互補(bǔ)系統(tǒng)，研究其拓?fù)洹⒛芰抗芾砗拖到y(tǒng)參數(shù)設(shè)計(jì)等等在隔離應(yīng)用的中小功率場(chǎng)合，推挽變換器控制方便，結(jié)構(gòu)簡(jiǎn)單，應(yīng)用廣泛傳統(tǒng)的多輸入推挽變換器結(jié)構(gòu)復(fù)雜，成本高。通過分析MIC的生成方法，利用脈沖電壓源 Pulsating Voltage Source Ce，PⅤSC或者脈沖電流源（Pulsating Curren Source Cell，PCSC）中聯(lián)或者并聯(lián)構(gòu)成簡(jiǎn)單實(shí)用的一族多輸入推挽變換器，詳細(xì)分析了BUCK型PVSC串聯(lián)構(gòu)成的雙輸入推挽變換器的小信號(hào)模型和控制方式，為了能夠提供交流輸出，本文還詳細(xì)分析了半橋逆變電路的控制方式，并推導(dǎo)出其數(shù)學(xué)控制模型通過分析系統(tǒng)的工作模式、能量管理策略和不同控制方式對(duì)系統(tǒng)的影響，闡叨基于雙輸入推挽變換器的光電互補(bǔ)系統(tǒng)的工作原理。并對(duì)系統(tǒng)軟件涉及到的太陽能最大功率跟蹤、光電互補(bǔ)控制和逆變控制等算法進(jìn)行重點(diǎn)研究功率電路參數(shù)設(shè)計(jì)合理與否，直接影響著系統(tǒng)的性能和指標(biāo)，其中推挽變壓器和濾波器的參數(shù)設(shè)計(jì)尤為重要，為此專門給出了硬件參數(shù)設(shè)計(jì)步驟；然后，根據(jù)軟件算法，設(shè)計(jì)了控制軟件流程圖來更清晰的表達(dá)軟件控制的思想軟件參數(shù)是影響系統(tǒng)魯棒性和快速性的另一個(gè)關(guān)鍵因素，在硬件設(shè)計(jì)的基礎(chǔ)上，對(duì)軟件參數(shù)進(jìn)行優(yōu)化設(shè)計(jì)，并利用 Simulink軟件對(duì)設(shè)計(jì)參數(shù)進(jìn)行仿真分析和修正。然后采用TMS320F2809作為控制芯片，搭建了實(shí)驗(yàn)原理樣機(jī)，并進(jìn)行了相關(guān)驗(yàn)證實(shí)驗(yàn)
標(biāo)簽： 推挽變換器
上傳時(shí)間： 2022-03-16
上傳用戶：
電子書-RTL Design Style Guide for Verilog HDL540頁A FF having a fixed INPUT value is generated from the description in the upper portion of Example 2-21. In this case, ’0’ is output when the reset signal is asynchronously INPUT, and ’1’ is output when the START signal rises. Therefore, the FF data INPUT is fixed at the power supply, since the typical value ’1’ is output following the rise of the START signal. When FF INPUT values are fixed, the fixed INPUTs become untestable and the fault detection rate drops. When implementing a scan design and converting to a scan FF, the scan may not be executed properl not be executed properly, so such descriptions , so such descriptions are not are not recommended. recommended.[1] As in the lower part of Example 2-21, be sure to construct a synchronous type of circuit and ensure that the clock signal is INPUT to the clock pin of the FF. Other than the sample shown in Example 2-21, there are situations where for certain control signals, those that had been switched due to the conditions of an external INPUT will no longer need to be switched, leaving only a FF. If logic exists in a lower level and a fixed value is INPUT from an upper level, the INPUT value of the FF may also end up being fixed as the result of optimization with logic synthesis tools. In a situation like this, while perhaps difficult to completely eliminate, the problem should be avoided as much as possible.
標(biāo)簽： RTL verilog hdl
上傳時(shí)間： 2022-03-21
上傳用戶：canderile
以AT89S52單片機(jī)為控制核心,采用電容降壓技術(shù),Buck電路拓?fù)?PWM驅(qū)動(dòng)模塊和功率器件散熱設(shè)計(jì),通過高速的數(shù)據(jù)采集、主功率輸入輸出模塊和控制模塊,設(shè)計(jì)一種新型智能車載充電器.在充電過程中,通過負(fù)脈沖瞬間放電實(shí)現(xiàn)對(duì)鉛酸蓄電池的再生修復(fù),提高電池的有效容量,延長(zhǎng)使用壽命.該充電器體積小、速度快、效率高、可靠性好.With AT89S52 single chip computer as the control core,a new type of intelligent car-carried charger was designed by using capacitance step-down technology,Buck circuit topology,PWM driving module and power device heat dissipation design,through high-speed data acquisition,main power INPUT and output module and control module.In the charging process,the regeneration and repair of lead-acid batteries are realized by instantaneous discharge of negative pulse,which improves the effective capacity of batteries and prolongs their service life.The charger has the advantages of small size,fast speed,high efficiency and good reliability.
標(biāo)簽： 車載充電器
上傳時(shí)間： 2022-03-27
上傳用戶：
在半導(dǎo)體制冷技術(shù)的工作性能及其優(yōu)缺點(diǎn)研究的基礎(chǔ)上,設(shè)計(jì)了以單片機(jī)為核心控制元件,以TEC1-12706為執(zhí)行元件的半導(dǎo)體制冷溫度控制系統(tǒng)。采用高精度分段式PID控制算法配合PWM輸出控制的方法實(shí)現(xiàn)溫度控制;選擇數(shù)字傳感器DS18B20為溫度檢測(cè)元件,還包含1602液晶顯示模塊、按鍵調(diào)整輸入模塊和H橋驅(qū)動(dòng)模塊等。實(shí)際測(cè)試表明,該系統(tǒng)結(jié)構(gòu)簡(jiǎn)單易行,操作方便,工作性能優(yōu)良,同時(shí)針對(duì)該系統(tǒng)專門設(shè)計(jì)的溫控算法,使半導(dǎo)體制冷器能更好地適應(yīng)不同工況而充分發(fā)揮其制冷制熱工作特性。Based on the study of the performance and advantages and disadvantages of thermoelectric cooler(TEC)technology,a thermoelectric cooling temperature control system with single-chip microcomputer as the core control element and TEC1-12706 as the executive element was designed. High precision piecewise PID control algorithm combined with PWM output control method is adopted to realize temperature control. The digital sensor DS18B20 is selected as the temperature detection element. It also includes 1602 LCD module,key adjustment INPUT module and H bridge drive module. The actual test shows that the system has simple structure,convenient operation and excellent performance. Meanwhile,the temperature control algorithm specially designed for the system can make the semiconductor cooler better adapt to different working conditions and give full play to its refrigeration and heating characteristics.
標(biāo)簽： 半導(dǎo)體 溫度控制系統(tǒng)
上傳時(shí)間： 2022-03-27
上傳用戶：
設(shè)計(jì)了自動(dòng)控制系統(tǒng)綜合實(shí)驗(yàn)案例“基于LabVIEW和單片機(jī)的溫度控制系統(tǒng)設(shè)計(jì)”。實(shí)驗(yàn)系統(tǒng)硬件部分由單片機(jī)、溫度傳感器、D/A轉(zhuǎn)換模塊、調(diào)壓模塊和電烤箱組成,設(shè)計(jì)了單片機(jī)與各個(gè)模塊之間的接口電路。軟件部分采用LabVIEW軟件實(shí)現(xiàn)控制算法,并設(shè)計(jì)監(jiān)控界面實(shí)現(xiàn)參數(shù)設(shè)定、溫度數(shù)據(jù)實(shí)時(shí)監(jiān)控等功能。設(shè)計(jì)了單片機(jī)與LabVIEW軟件之間的串口通信程序,實(shí)現(xiàn)了輸入、輸出數(shù)據(jù)的傳輸。通過綜合實(shí)驗(yàn)系統(tǒng)設(shè)計(jì),使學(xué)生得到控制系統(tǒng)設(shè)計(jì)和實(shí)驗(yàn)調(diào)試等綜合能力的訓(xùn)練。A comprehensive experimental case of the automatic control system is presented,which is the design of the temperature control system based on LabVIEW and SCM.The hardware part of the experimental system is composed of the SCM,temperature sensor,D/A conversion module,voltage regulating module and electric oven.The interface circuit between the SCM and each module is designed.In the software part,LabVIEW software is used to realize the control algorithm,and the monitoring interface is designed to realize the functions of parameter setting,temperature data real-time monitoring,etc.The serial communication program between the SCM and LabVIEW software is designed to realize the transmission of INPUT and output data.Through the design of this comprehensive experimental system,students can get the comprehensive ability training for the control system design,experiment debugging,etc.
標(biāo)簽： labview 單片機(jī) 自動(dòng)控制系統(tǒng)
上傳時(shí)間： 2022-03-27
上傳用戶：qdxqdxqdxqdx
LED 線陣顯示裝置, 分為 LED 線性旋轉(zhuǎn)顯示主機(jī)和圖文錄入器兩部分。主機(jī)用直流電機(jī)帶動(dòng)由紅綠 LED 組成的線陣旋轉(zhuǎn), 同時(shí)線陣按照時(shí)序依次切換顯示狀態(tài), 在固定區(qū)域利用視覺暫留效果形成 16×16 點(diǎn)陣, 用以顯示圖文;圖文錄入器用 HMI 觸控屏作為人機(jī)交互界面, 實(shí)現(xiàn)圖文錄入和回放功能。主機(jī)與圖文錄入器通過無線通信方式進(jìn)行信息交互,可由圖文錄入器控制主機(jī)切換不同工作任務(wù), 以及改變線陣顯示內(nèi)容。The LED linear array display device is divided into two parts:the one is the main unit used to display content,and the other one is used to INPUT the contents.The main unit is driven by a DC motor to rotate the linear array composed by red and green light emitting diodes.At the same time,the 16×16 dot matrix that switching the display state according to the time sequence on the main unit displays pictures and texts in the fixed area,by using the visual temporary effect.The HMI touch screen is used as human machine interface to realize the function that INPUT and playback pictures and texts.The two parts of the device communicate with each other through wireless communication.The image and text INPUT controller can control the main unit to switch different tasks and change the content of linear array displayed.
標(biāo)簽： stc12c5a60s2 單片機(jī) led
上傳時(shí)間： 2022-03-28
上傳用戶：jiabin
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：
高通(Qualcomm)藍(lán)牙芯片QCC5144_硬件設(shè)計(jì)詳細(xì)指導(dǎo)書（官方內(nèi)部培訓(xùn)手冊(cè)）其內(nèi)容是針對(duì)硬件設(shè)計(jì)、部分重要元器件選擇(ESD，F(xiàn)ilter）及走線注意事項(xiàng)的詳細(xì)說明。2 Power management 2.1 SMPS 2.1.1 Components specification 2.1.2 INPUT power supply selection 92.1.3 Minimize SMPS EMI emissions 2.1.4 Internal LDOs and digital core decoupling 2.1.5 Powering external components 2.2 Charger 2.2.1 Charger connections.2.2.2 General charger operation2.2.3 Temperature measurement during charging 2.3 SYS_CTRL 3 Bluetooth radio3.1 RF PSU component choice 3.2 RF band-pass filter3.3 Layout (天線 走線的注意事項(xiàng))4 Audio4.1 Audio bypass capacitors 4.2 Earphone speaker output4.3 Line/Mic INPUT 4.4 Headphone output optimizition5 LED pads 5.1 LED driver 5.2 Digital/Button INPUT 5.3 Analog INPUT5.4 Disabled 6 Reset pin (Reset#)7 USB interfaces7.1 USB device port7.1.1 USB device port7.1.2 Layout notes 7.1.3 USB charger detectionA QCC5144 VFBGA example schematic and BOM B Recommended SMPS components specificationB.1 Inductor specifition B.2 Recommended inductors B.3 SMPS capacitor specifition
上傳時(shí)間： 2022-04-07
上傳用戶：默默
介紹一種萬能模擬信號(hào)輸入采集電路,可以同時(shí)支持電壓、電流、熱電偶、熱電阻等常見的工業(yè)類型信號(hào),方便后級(jí)電路的測(cè)量。該研究成果通過不斷優(yōu)化和完善,已成功應(yīng)用到了中控儀表的新產(chǎn)品中。The paper introduces a collection circuit of universal signal INPUT. The circuit support voltage, current, thermocouple, thermal resistance and other common industrial type signal. The research results, which has been continuous optimized and improved, has been successfully applied to the new production of Zhejiang Supcon Instrument Co., Ltd.
標(biāo)簽： 采集電路
上傳時(shí)間： 2022-04-21
上傳用戶：slq1234567890
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