LED 線陣顯示裝置, 分為 LED 線性旋轉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, 同時線陣按照時序依次切換顯示狀態, 在固定區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, 以及改變線陣顯示內容。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.
標簽: stc12c5a60s2 單片機 led
上傳時間: 2022-03-28
上傳用戶:jiabin
近距電能傳輸——高效安全近距電能傳輸一般基于電磁感應原理進行。在此技術基礎上,當接收器鄰近發射器時才會進行電能傳輸。電磁感應技術的歷史長達百年,多年米一直應用于各類電子產品中—如此普及全因其簡單、高效以及安全技術概覽以下將為你簡要介紹無線電能傳輸技術。System Overview(Communication)Receiver sends messagesTo provide control information to the transmitterBy load modulation on the power signaTransmitter receives messagesTo receive control information frorn the recelverBy de-modulation of the reflected loadPower Pick Up( Receiver)Secondary coil (L Serial resonance capacitor (C) for efficient power transfer Parallel resonance capacitor(C, )for detection purposes Rectifier: full bridge(diode, or switched)+ capacitor Output switch for(dis)connecting the loadReceiver modulates load by Switching modulation resistor(R,n),or Switching modulation capacitor(Ca)Transmitter de-modulates reflected load by Sensing pnmary coil curent (p)and/o Sensing primary coil voltage (V,
上傳時間: 2022-03-31
上傳用戶:
基于TMS320F28335的超聲波流量計硬件原理圖+軟件源碼本文以TMS320F28335 處理器為核心,設計一種用于管道流量測量的超聲波流量計。系統硬件由核心板,超聲波發射和接收電路,切換電路,超聲換能器,基于ADS805 的高速信號采集電路,人機交互以及電源等模塊構成。采用時差法進行管道流量測量,時差測量采用SCOT 加權的廣義互相關時延估計算法。本論文設計的超聲波流量計具有測量速度快、準確性好、成本低等優點。關鍵字:C2000,超聲波,流量,廣義互相關算法AbstractA kind of ultrasonic flowmeter using for the pipe flow measurement is designed based onTMS320F28335 in this paper. The system hardware consists of the following parts: the core board,ultrasonic signal transmitter and receiver circuits, switch circuit, ultrasonic transducer, signalacquisition circuit based on ADS805, human-computer interaction module and power supplymodule, etc. The system use the method of time difference for pipeline flow measurement and thetime difference is calculated by the time-delay algorithm of SCOT weighted generalizedcross-correlation. The ultrasonic flowmeter has the features of high testing speed, high precisionand low cost, etc.Keywords: C2000,Ultrasonic, Flow, Generalized Cross-Correlation Algorithm
標簽: tms320f28335 超聲波流量計
上傳時間: 2022-05-06
上傳用戶:
#include "NUC1xx.h"#include "Hal.h"#include "pwm.h"//wait current PWM cycle done, otherwise there maybe short pulse on FETvoid PWM_Stop(U8 ch){ switch(ch) { case PWM_CHANNEL_A: PWMA->u32CNR1 = 0; PWMA->u32CMR1 = 0; while(PWMA->u32PDR1 != 0); break; case PWM_CHANNEL_B: PWMA->u32CNR2 = 0; PWMA->u32CMR2 = 0; while(PWMA->u32PDR2 != 0); break; case PWM_CHANNEL_C: PWMA->u32CNR3 = 0; PWMA->u32CMR3 = 0; while(PWMA->u32PDR3 != 0); break; default: while(1); } PWMA->u32POE &= ~(1<<ch); PWMA->u32PCR &= ~(1<<(ch*8));}
上傳時間: 2022-06-01
上傳用戶:kingwide
RTL9047A 為車用乙太網single chip 交換機方案,如下圖port0~port3 總共提供4ports 100BASE-T1,不用外掛PHY可節省cost 及PCB空間;port4為 selection port可選擇設定100BASE-T1或SGMII,其SGMII個外接CPU或對接相同型號switch做cascade擴充;port5為 selection port可選擇設定傳統100base-TX FE PHY, SGMII或 RGMII/MII/RMII,其100base-TX 界面作為車載Diagnostic界面;port6為RGMII/MII/RMII 界面,可用來外接CPU或擴充網路界面等應用。
上傳時間: 2022-06-07
上傳用戶:
MOSFET和IGBT內部結構不同, 決定了其應用領域的不同.1, 由于MOSFET的結構, 通常它可以做到電流很大, 可以到上KA,但是前提耐壓能力沒有IGBT強。2,IGBT 可以做很大功率, 電流和電壓都可以, 就是一點頻率不是太高, 目前IGBT硬開關速度可以到100KHZ,那已經是不錯了. 不過相對于MOSFET的工作頻率還是九牛一毛,MOSFET可以工作到幾百KHZ,上MHZ,以至幾十MHZ,射頻領域的產品.3, 就其應用, 根據其特點:MOSFET應用于開關電源, 鎮流器, 高頻感應加熱, 高頻逆變焊機, 通信電源等等高頻電源領域;IGBT 集中應用于焊機, 逆變器, 變頻器,電鍍電解電源, 超音頻感應加熱等領域開關電源 (Switch Mode Power Supply ;SMPS) 的性能在很大程度上依賴于功率半導體器件的選擇,即開關管和整流器。雖然沒有萬全的方案來解決選擇IGBT還是MOSFET的問題,但針對特定SMPS應用中的IGBT 和 MOSFET進行性能比較,確定關鍵參數的范圍還是能起到一定的參考作用。本文將對一些參數進行探討,如硬開關和軟開關ZVS ( 零電壓轉換) 拓撲中的開關損耗,并對電路和器件特性相關的三個主要功率開關損耗—導通損耗、傳導損耗和關斷損耗進行描述。此外,還通過舉例說明二極管的恢復特性是決定MOSFET或 IGBT 導通開關損耗的主要因素, 討論二極管恢復性能對于硬開關拓撲的影響。導通損耗除了IGBT的電壓下降時間較長外, IGBT和功率MOSFET的導通特性十分類似。由基本的IGBT等效電路(見圖1)可看出,完全調節PNP BJT集電極基極區的少數載流子所需的時間導致了導通電壓拖尾( voltage tail )出現。
上傳時間: 2022-06-21
上傳用戶:
引言開關電源(SMPS:Switch Mode Power Supply)是利用現代電力電子技術,控制開關管開通和關斷的時問比率,維持穩定輸出電壓的一種電源·非隔離式DC/DC變換具有六種基本拓撲結構:降壓(Buck)變換器升壓(Boost)變換器極性反轉升降壓(Buck2Boost)變換器Cuk(Boost2Buck 聯)變換器Sepic變換器Zeta變換器[-1,與線性電源相比,開關電源具有體積小重量輕效率高自身抗干擾性強輸出電壓范圍寬模塊化等優點。LTspice IV是LT公司推出的SPICE電路仿真軟件,具有集成電路圖捕獲和波形觀測功能。LTspice IV內置新型SPIE元件,能快速進行SMPS交互式仿真,且無元件或節點數目的限制.LTspice IV雖然與開關模式電源設計配合使用,但它并不是SMPS專用型SPICE軟件,而是一款通用型SPICE-LTspice IV內置了LT公司新型SPARSE矩陣求解器,采用專有的并行處理方法,實現了對任務的高效并行處理"。
上傳時間: 2022-06-26
上傳用戶:
This example shows how you can use signal functions in the Visiondebugger to simulate a signal that is coming into one of the analog inputs of the LPC21xx.The Measure example is described in detail in the Getting StartedUser's Guide.The MEASURE example program is available for several targets:Simulator: uVision Simulator for LPC2129MCB2100: Keil MCB2100 evaluation board with ULINK debugger - Application is loaded to internal Flash. - Switch S2 (INT1) is used as GPIO and sampled (jumper positions: J1= off, J7= on) - potentiometer POT1 is sampled as AIN0 (jumper position: J2= on) - serial port COM1 parameters: 9600 baud, no parity, 8-bits, 1 stop bit, flow control noneMCB2130: Keil MCB2130 evaluation board with ULINK debugger - Application is loaded to internal Flash. - Switch S2 (INT1) is used as GPIO and sampled (jumper positions: J1= off, J7= on) - potentiometer POT1 is sampled as AIN1 (jumper position: J2= on) - serial port COM1 parameters: 9600 baud, no parity, 8-bits, 1 stop bit, flow control none
標簽: dac8568
上傳時間: 2022-06-28
上傳用戶:
概述什么是Arduino?Arduino是一塊基與開放原始代碼的Simple i/o平臺,業且具有使用類似java,C語言的開發環境。讓您可以快速使用Arduino語言與Flash或Processing...等軟件,作出互動作品。Arduino可以使用開發完成的電子元件例如Switch或Sensors或其他控制器、LED、步進地機或其他輸出裝置。Arduino也可以獨立運作成為一個可以跟軟件溝通的平臺,例如說:flash processing Max/MSPVVVV或其他互動軟件…Arduino開發IDE界面基于開放原始碼原則,可以讓您免費下載使用開發出更多令人驚奇的互動作品。什么是Roboduino?DFRduino與Arduino完全兼容,只是在原來的基礎上作了些改進。Arduino的10使用的孔座,做互動作品需要面包板和針線搭配才能進行,而DFRduino的10使用針座,使用我們的杜邦線就可以直接把各種傳器連接到DFRduino上。
標簽: arduino
上傳時間: 2022-07-16
上傳用戶:
Overview The MT7628 router-on-a-chip includes an 802.11n MAC and baseband,a 2.4 GHz radio and FEM,a 575/580MHz MIPS? 24K% CPU core,a 5-port 10/100 fast ethernet switch. The MT7628 includes everything needed to build an AP router from a single chip. The embedded high performance CPU can process advanced applications effortlessly, such as routing, security and VolP. The MT7628 also includes a selection of interfaces to support a variety of applications, such as a USB port for accessing external storage.Features· Embedded MIPS24KEc(575/580 MHz) with 64KBl-Cache and 32 KB D-Cache·2T2R 2.4 GHz with 300 Mbps PHY data rate· Legacy 802.11b/g and HT 802.11n modes·20/40 MHz channel bandwidth· Reverse Data Grant(RDG)· Maximal Ratio Combining(MRC)· Space Time Block Coding(STBC)· MCM 8 Mbytes DDR1 KGD(MT7628KN)
標簽: mt7628
上傳時間: 2022-07-18
上傳用戶: