本系統(tǒng)基于STM32單片機設(shè)計的非接觸式電流檢測控制系統(tǒng),通過OPA548片將所給任意信號放大,由100Ω電阻和INA128芯片進行電流電壓轉(zhuǎn)換放大后,利用STM32單片機對獲取的電壓信號以0.488μs頻率采樣,利用STM32單片機的FFT庫,獲得信號的諧波信息。測量電流信號精準(zhǔn),該設(shè)計可廣泛應(yīng)用在以STM32單片機為核心控制器件的新型儀表中,性能精準(zhǔn)且抗干擾能力強。This system is a non-contact current detection and control system based on STM32 single chip microcomputer. It amplifiesany signal through OPA548 chip, converts and amplifies the current and voltage by 100 Ω resistance and INA128 chip. The obtainedvoltage signal is sampled at the frequency of 0.488 μs by STM 32 single chip microcomputer, and the harmonic information of the signalis obtained by the FFT library of STM 32 single chip microcomputer. The measurement of current signal is accurate. This design can bewidely used in a new instrument with STM 32 single chip microcomputer as its core control Device, with accurate performance and stronganti-interference capability.
上傳時間： 2022-03-27
上傳用戶：
入室搶劫事件屢見不鮮,針對此現(xiàn)象進行分析不難發(fā)現(xiàn),造成失竊事件的極大原因是人們慵懶和意識差等不良性格造成習(xí)慣性不鎖門.本文以STC89C52單片機為基礎(chǔ),設(shè)計了一種基于人體紅外傳感器的自動關(guān)門鎖門裝置,來解決此類問題.The incidents of burglary are so common. It is not difficult to find that the main reason for the burglary is the habit of unlocking of doors caused by people's laziness and poor consciousness. Based on the single chip microcomputer of STC89C52, a Device used with infrared sensor of human body is introduced in this paper, which can achieve the effect of automatic closing and locking doors.
上傳時間： 2022-03-27
上傳用戶：canderile
數(shù)字示波器功能強大,使用方便,但是價格相對昂貴。本文以Ti的MSP430F5529為主控器,以Altera公司的EP2C5T144C8 FPGA器件為邏輯控制部件設(shè)計數(shù)字示波器。模擬信號經(jīng)程控放大、整形電路后形成方波信號送至FPGA測頻,根據(jù)頻率值選擇采用片上及片外高速AD分段采樣。FPGA控制片外AD采樣并將數(shù)據(jù)輸入到FIFO模塊中緩存,由單片機進行頻譜分析。測試表明:簡易示波器可以實現(xiàn)自動選檔、多采樣率采樣、高精度測頻及頻譜分析等功能。Digital oscilloscope is powerful and easy to use, but also expensive. The research group designed a low-cost digital oscilloscope, the chip of MSP430F5529 of TI is chosen as the main controller and the Device of EP2C5T144C8 of Altera company is used as the logic control unit. Analog signal enter the programmable amplifier circuit, shaping circuit and other pre-processing circuit. The shaped rectangular wave signal is sent to FPGA for measure the frequency. According to the frequency value to select AD on-chip or off-chip high-speed AD for sampling. FPGA controls the off-chip AD sampling and buffers AD data by FIFO module. The single chip microcomputer receives the data, and do FFT for spectrum analysis. The test shows that the simple oscilloscope can realize automatic gain selection, sampling at different sampling rates, high precision frequency measurement and spectrum analysis.
標(biāo)簽： msp430 單片機 fpga 數(shù)字示波器
上傳時間： 2022-03-27
上傳用戶：
LED 線陣顯示裝置, 分為 LED 線性旋轉(zhuǎn)顯示主機和圖文錄入器兩部分。主機用直流電機帶動由紅綠 LED 組成的線陣旋轉(zhuǎn), 同時線陣按照時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 點陣, 用以顯示圖文;圖文錄入器用 HMI 觸控屏作為人機交互界面, 實現(xiàn)圖文錄入和回放功能。主機與圖文錄入器通過無線通信方式進行信息交互,可由圖文錄入器控制主機切換不同工作任務(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 led
上傳時間： 2022-03-28
上傳用戶：jiabin
因此，您想編寫一個內(nèi)核模塊。您知道C，您已經(jīng)編寫了一些可以作為進程運行的常規(guī)程序，現(xiàn)在您想知道真正的動作在哪里，一個通配指針可以擦掉文件系統(tǒng)，核心轉(zhuǎn)儲意味著重新啟動。內(nèi)核模塊到底是什么？模塊是可以根據(jù)需要加載和卸載的代碼段。它們擴展了內(nèi)核的功能，而無需重新引導(dǎo)系統(tǒng)。例如。模塊驅(qū)動程序的一種類型是設(shè)備驅(qū)動程序，它允許內(nèi)核訪問沒有模塊的系統(tǒng)硬件，我們將不得不構(gòu)建單片內(nèi)核并將新功能直接添加到內(nèi)核映像中，除了具有更大的內(nèi)核之外，這還具有缺點每次我們想要新功能時都要求我們重建并重新啟動內(nèi)核的過程So, you want to write a kernel module. You know C, you, ve written a few normal programs to run as processes, and now you want to get to where the real action is, to where a single wild pointer can wipe out your file system and a core dump means a reboot.What exactly is a kernel module? Modules are pieces of code that can be loaded and unloaded into th upon demand. They extend the functionality of the kernel without the need to reboot the system. For example.one type of module is the Device driver, which allows the kernel to access hardware connected to the syste without modules, we would have to build monolithic kernels and add new functionality directly into the em ernel image, Besides having larger kernels
標(biāo)簽： linux
上傳時間： 2022-03-30
上傳用戶：
設(shè)計功率MOSFET驅(qū)動電路時需重點考慮寄生參數(shù)對電路的影響。米勒電容作為MOSFET器件的一項重要參數(shù),在驅(qū)動電路的設(shè)計時需要重點關(guān)注。重點觀察了MOSFET的開通和關(guān)斷過程中柵極電壓、漏源極電壓和漏源極電流的變化過程,并分析了米勒電容、寄生電感等寄生參數(shù)對漏源極電壓和漏源極電流的影響。分析了柵極電壓在米勒平臺附近產(chǎn)生振蕩的原因,并提出了抑制措施,對功率MOSFET的驅(qū)動設(shè)計具有一定的指導(dǎo)意義。When designing the drive circuit of power MOSFET,the influence of parasitic parameters on the circuit should be concerned.As an important parameter of MOSFET Device,Miller capacitance should be considered in the design of drive circuit.The variation of gate voltage,drain source voltage and drain source current during the turn-on and turn-off of MOSFET were observed.The influences of parasitic parameters such as Miller capacitance and parasitic inductance on drain source voltage and drain source current were analyzed.The reasons of gate voltage oscillation nearby Miller plateau were analyzed,and the restraining measures were put forward.This research was instructive for the drive design of power MOSFET.
標(biāo)簽： mosfet
上傳時間： 2022-04-02
上傳用戶：默默
搶答器是一種智力競賽常用的器件,搶答器的設(shè)計方法千差萬別,文章利用常用的數(shù)字電子器件,設(shè)計了八路搶答器電路的設(shè)計、仿真及實現(xiàn)的全過程,提出兩種可行的設(shè)計方案:方案1采用74ls373實現(xiàn)電路鎖存,74ls148實現(xiàn)電路編碼,74ls74及數(shù)碼管實現(xiàn)電路顯示;方案二采用CD4511BCN和LMC555CM集成電路及數(shù)碼管實現(xiàn)搶答器的控制和顯示。本文設(shè)計用的器件簡單,容易理解,適用于初學(xué)電子技術(shù)的人員。Answer scrambler is a common Device in intelligence competition, and its design methods vary greatly. This paper designs the whole process of design, simulation and Realization of the circuit of eight-way answer scrambler by using common digital electronic Devices, and puts forward two feasible design schemes: scheme 1 uses 74 ls373 to realize circuit latching, 74 ls148 to realize circuit coding,74 ls74 and digital tube to realize circuit. The second scheme uses CD4511 BCN, LMC555 CM integrated circuit and digital tube to control and display the answerer. The Device designed in this paper is simple and easy to understand, and it is suitable for the beginners of electronic technology.
標(biāo)簽： 搶答器
上傳時間： 2022-04-05
上傳用戶：
高通(Qualcomm)藍牙芯片QCC5144_硬件設(shè)計詳細指導(dǎo)書（官方內(nèi)部培訓(xùn)手冊）其內(nèi)容是針對硬件設(shè)計、部分重要元器件選擇(ESD，F(xiàn)ilter）及走線注意事項的詳細說明。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)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
上傳時間： 2022-04-07
上傳用戶：默默
【摘要】：隨著USB接口在計算機業(yè)界應(yīng)用越來越廣泛，基于USB的接口開發(fā)顯得越來越具有現(xiàn)實意義。隨著客戶對系統(tǒng)數(shù)據(jù)采集速度要求的不斷提高，USB以其使用方便、易于擴展、速度快等優(yōu)點而越來越多的被應(yīng)用于各種人機接口設(shè)備中。本設(shè)計提出了一種USB接口的HID數(shù)據(jù)通訊接口設(shè)計方案，USB接口芯片采用的是PHILIP的PDIUSBD12，微控器是宏晶科技的STC89C52RC。該方案具有器件通用、成本低、方便焊接調(diào)試等特點。由于本設(shè)計采用了PDIUSBD12接口芯片，通過改變微控器的代碼可以制作成各種標(biāo)準(zhǔn)的USB設(shè)備。本設(shè)計完成了一種典型的HID設(shè)備驅(qū)動程序的開發(fā)，PC機無需額外加裝驅(qū)動便可實現(xiàn)和USB設(shè)備之間的通訊。而且經(jīng)過典型HID設(shè)備的枚舉過程，還可用于對USB協(xié)議的熟悉和學(xué)習(xí)。上位機軟件部分，采用了VisualC++6.0編寫HID設(shè)備的控制程序，此控制程序和HID下位機設(shè)備構(gòu)成了完整的USB控制系統(tǒng)。在此基礎(chǔ)上，本設(shè)計還增加了簡單的音樂播放功能，可以打開并播放格式為mp3和wma的音頻文件，還可以暫停、停止、選擇播放曲目、調(diào)節(jié)音量等；在音頻播放時HID設(shè)備彩燈可以實時顯示音頻的頻譜。這在驗證USB系統(tǒng)的同時，大大增加了控制的趣味性。驗證結(jié)果表明按照該方案設(shè)計的數(shù)據(jù)通訊接口和HID設(shè)計運行穩(wěn)定可靠。USB是一種計算機和外部設(shè)備進行通訊連接的接口.USB的出現(xiàn)的目的是取代現(xiàn)在計算機接口，簡化計算機與外部設(shè)備的連接過程，使計算機的擴展更加方便。它使得計算機和外部設(shè)備的連接十分方便。目前，各種計算機外部設(shè)備都在逐漸改為USB接口，USB技術(shù)的出現(xiàn)是計算機接口技術(shù)的一大飛躍。越來越多的測控系統(tǒng)、信號處理系統(tǒng)和智能儀器選用USB接口與PC機進行高速、海量的數(shù)據(jù)通訊。但是，相對UART（通用異步串口）、LPT（打印機并行端口），USB的開發(fā)難度要大的多。采用HID（Human Interface Device，人機接口設(shè)備）的設(shè)計方案則可以很好的解決這一矛盾。
上傳時間： 2022-05-02
上傳用戶：shjgzh
ZLG-imx6ul核心板開發(fā)板底板Altium Designer AD設(shè)計硬件原理圖文件，IoTIoT -6G 2C 6G2C -L采用 無線 核心板 核心板 和底板 組合的方式，核心和底板 組合的方式，核心和底板 組合的方式，核心和底板 組合的方式，核心和底板 組合的方式，核心和底板 組合的方式，核心采用 NXPNXPNXP基于 ARM CortexARM CortexARM Cortex ARM CortexARM Cortex ARM CortexARM Cortex -A7內(nèi)核的 內(nèi)核的 i.MXi.MX i.MX6UL6UL6UL應(yīng)用處理器， 應(yīng)用處理器， 應(yīng)用處理器， 主頻最高達 主頻最高達 主頻最高達 528 MH z，核心板 核心板 配備 256256 MB MB MB DDR 3和 256 MB NAND FlashNAND FlashNAND FlashNAND FlashNAND FlashNAND FlashNAND FlashNAND Flash NAND Flash；此外核心板 此外核心板 還支 持支持 802.11b/g/n802.11b/g/n 802.11b/g/n 802.11b/g/n 802.11b/g/n協(xié)議 WIFIWIFIWIFIWIFI、藍牙 4.0 通信功能 。主板 提供 8路 UARTUARTUARTUART、1路模擬 I2C、1路 12bit ADC 12bit ADC12bit ADC12bit ADC12bit ADC12bit ADC，支持兩通道采樣 ，支持兩通道采樣 ，支持兩通道采樣 ，支持兩通道采樣 ，支持兩通道采樣 、2路 10/100M 10/100M 10/100M以太網(wǎng)接口、 以太網(wǎng)接口、 以太網(wǎng)接口、 以太網(wǎng)接口、 1路 SD 卡電路 卡電路 、1路左右聲道 左右聲道 左右聲道 模擬音頻 模擬音頻 接口、 接口、 2路 USB HostUSB HostUSB HostUSB HostUSB HostUSB Host 接口 （1路與 USB DeviceUSB Device USB DeviceUSB DeviceUSB DeviceUSB DeviceUSB DeviceUSB Device 共用同一路 共用同一路 USB OTGUSB OTGUSB OTGUSB OTGUSB OTGUSB OTGUSB OTG）、 1路 USB USB USB USB DeviceDevice DeviceDevice 接口， 接口， 可滿足數(shù)據(jù)采集等多種 滿足數(shù)據(jù)采集等多種 滿足數(shù)據(jù)采集等多種 滿足數(shù)據(jù)采集等多種 消費電子和工業(yè)控制應(yīng)用 消費電子和工業(yè)控制應(yīng)用 消費電子和工業(yè)控制應(yīng)用 消費電子和工業(yè)控制應(yīng)用 消費電子和工業(yè)控制應(yīng)用 場合 。
標(biāo)簽： zlg 文件 核心 開發(fā)板 底板 altium designer ad 設(shè)計 硬件 原理圖 imx6ul
上傳時間： 2022-05-11
上傳用戶：fliang
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