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lightweight

DN436微型全橋壓電馬達(dá)驅(qū)動(dòng)器

Piezoelectric motors are used in digital cameras for autofocus,zooming and optical image stabilization. Theyare relatively small, lightweight and effi cient, but theyalso require a complicated driving scheme. Traditionally,this challenge has been met with the use ofseparatecircuits, including a step-up converter and an oversizedgeneric full-bridge drive IC. The resulting high componentcount and large board space are especially problematicin the design of cameras for ever shrinking cell phones.The LT®3572 solves these problems by combining astep-up regulator and a dual full-bridge driver in a 4mm× 4mm QFN package. Figure 1 shows a typical LT3572Piezo motor drive circuit. A step-up converter is usedto generate 30V from a low voltage power source suchas a Li-Ion battery or any input power source within thepart’s wide input voltage range of 2.7V to 10V. The highoutput voltage of the step-up converter, adjustable upto 40V, is available for the drivers at the VOUT pin. Thedrivers operate in a full-bridge fashion, where the OUTAand OUTB pins are the same polarity as the PWMA andPWMB pins, respectively, and the OUTA and OUTB pinsare inverted from PWMA and PWMB, respectively. Thestep-up converter and both Piezo drivers have their ownshutdown control. Figure 2 shows a typical layout

標(biāo)簽： 436 DN 全橋壓電

上傳時(shí)間： 2013-11-18

上傳用戶：hulee
超級(jí)電容器備用電源系統(tǒng)的手持設(shè)備數(shù)據(jù)保護(hù)

Handheld electronic devices play a key role in our everydaylives. Because dependability is paramount, handhelds arecarefully engineered with lightweight power sources forreliable use under normal conditions. But no amount ofcareful engineering can prevent the mistreatment theywill undergo at the hands of humans. For example, whathappens when a factory worker drops a bar code scanner,causing the battery to pop out? Such events areelectronically unpredictable, and important data storedin volatile memory would be lost without some form ofsafety net—namely a short-term power holdup systemthat stores suffi cient energy to supply standby power untilthe battery can be replaced or the data can be stored inpermanent memory.

標(biāo)簽： 超級(jí)電容器備用電源手持設(shè)備

上傳時(shí)間： 2013-11-05

上傳用戶：coeus
allegro cx manual教程

We would like to welcome you as a user of the Allegro CX, a rugged, handheld ﬁ eld PC for data collection. Developed with the input of data collection professionals worldwide, the Allegro CX is adaptable and versatile for use in a wide variety of data collection environments. The Allegro CX continues to utilize our ergonomic, lightweight design that is standard in our line of Allegro Field PCs. This design makes your Allegro easy to use for extended periods while moving to and from data collection sites in the ﬁ eld.

標(biāo)簽： allegro manual cx 教程

上傳時(shí)間： 2015-01-02

上傳用戶：zhangyi99104144
This article discusses some issues that a typical Windows C++ programmer will encounter when approac

This article discusses some issues that a typical Windows C++ programmer will encounter when approaching Symbian OS for the first time. Our experience in developing for three successive versions of Symbian OS has given us considerable perspective on what can be difficult when working in this otherwise rich and stable environment. While one reason for Symbian s success may be the desire of many mobile phone manufacturers not to be tied to Microsoft, the other reason is that Symbian has put together a lightweight, elegant system that succeeds in providing a very impressive range of functionality. Here are some pointers to help ease the transition to successful Symbian OS application development.

標(biāo)簽： programmer discusses encounter article

上傳時(shí)間： 2017-07-30

上傳用戶：zhaiyanzhong
LWIP無(wú)操作系統(tǒng)移植

lwip是一個(gè)輕量級(jí)的TCP/IP協(xié)議棧（lightweight TCP/IP Stack）實(shí)現(xiàn)，最初是瑞士計(jì)算機(jī)科學(xué)學(xué)院Adam Dunkels編寫的一個(gè)應(yīng)用于無(wú)操作系統(tǒng)的嵌入式系統(tǒng)中的TCP/IP協(xié)議棧，后來(lái)作為一個(gè)開(kāi)源（open source）項(xiàng)目，由一個(gè)全球性的團(tuán)隊(duì)進(jìn)行開(kāi)發(fā)和維護(hù)。

標(biāo)簽： LWIP 無(wú)操作系統(tǒng) 移植

上傳時(shí)間： 2016-06-13

上傳用戶：tttm1030
VIP專區(qū)-嵌入式/單片機(jī)編程源碼精選合集系列（74）

VIP專區(qū)-嵌入式/單片機(jī)編程源碼精選合集系列（74）資源包含以下內(nèi)容：1. Using lightweight IP with the Nios II Processor_nios2_lwip_tutorial,This tutorial familiarizes you w.2. 包含了CS8900的接口原理圖.3. NE2000兼容網(wǎng)卡驅(qū)動(dòng)編寫指南.4. ARM開(kāi)發(fā)流程 ppt文檔.5. ping指令詳解, c語(yǔ)言編寫.6. NIOS II UART 測(cè)試程序.7. NIOS II 與USB接口的程序.8. AD9852 串行控制子程序.9. 可以測(cè)量馬達(dá)的實(shí)際轉(zhuǎn)速,用的IC 是AT89C2051,也可以用于AT89C51.10. Keil工具Hello word源碼.11. LCD1601的液晶程序.12. LCD1602的程序.13. 電話遠(yuǎn)程控制的想法已有一段是時(shí)間.14. 這是一個(gè)小時(shí)計(jì)的程序.15. SONY的液晶驅(qū)動(dòng)程序,包括音量,亮度的調(diào)整,值得參考一下..16. CPLD在DS—FH混合擴(kuò)頻通信系統(tǒng)中的應(yīng)用.17. 基于LPC2131的SPI編程驅(qū)動(dòng),主機(jī)方式,查詢方式.18. pwm電機(jī)步進(jìn)控制.19. SL811 USB 開(kāi)發(fā)代碼.20. 基于UCM40的超聲波測(cè)距函數(shù),可測(cè)0.08---2.5米距離,數(shù)值精確.21. S3C2440開(kāi)發(fā)板原理圖.22. EVMDM642開(kāi)發(fā)板的詳細(xì)硬件介紹及原理圖。PDF格式。.23. 經(jīng)典的dds發(fā)生器ad9851vhdl的并行通信代碼.24. mpc2872系列的usb controller產(chǎn)生sof源碼.25. TI 的TMS320F2812芯片的開(kāi)發(fā)板原理圖和說(shuō)明.26. 一份基于AT89C51SND1A控制的MP3原理圖.27. 基于三星S3C2410 ARM芯片的開(kāi)發(fā)板原理圖.28. EVB使用CreateProcess API 呼叫IE 撥放wma 範(fàn)例.29. FlashROM的存儲(chǔ)控件操作源代碼.30. 鍵盤Key濾波功能源代碼.31. altera的usb下載線的制作資料.32. 嵌入式系統(tǒng)中,從任意一點(diǎn)到任意一點(diǎn)畫(huà)直線算法程序.33. 本程序是用VHDL語(yǔ)言實(shí)現(xiàn)對(duì)AD控制.34. 該程序應(yīng)用輪換查詢的方式實(shí)現(xiàn)了鍵盤的掃描.35. 該程序?yàn)閚iosＩＩ環(huán)境下的１３０２編程可以直接應(yīng)用.36. TMS320F2812原理圖設(shè)計(jì),不是很完善。希望高人指點(diǎn)。.37. Mega16微打驅(qū)動(dòng).38. ACN協(xié)議 Artnet協(xié)議 DMX512-A 調(diào)光網(wǎng)絡(luò).39. NIOSII 實(shí)驗(yàn)指導(dǎo).40. xilinx 開(kāi)發(fā)板原理圖,里面含有pcb圖,自己完全可以做一塊來(lái)玩,不用買別人的,很省錢,又鍛煉了自己..

標(biāo)簽： 模具材料壽命

上傳時(shí)間： 2013-06-17

上傳用戶：eeworm