如果將上世紀(jì)70年代末單片機(jī)的出現(xiàn)作為嵌入式系統(tǒng)技術(shù)發(fā)展的起點(diǎn)的話,其發(fā)展歷程幾乎與中國(guó)社會(huì)改革開放同步,已經(jīng)走過30年的歷程。與Windows操作系統(tǒng)和Intel處理器占?jí)艛嗟匚坏挠?jì)算機(jī)平臺(tái)不同的是,嵌入式系統(tǒng)的技
汽車熱限制器的烙鐵 Auto Heat Limiter for Soldering IronWattage of load10W18W25W35W65W80WValue of R5 (in ohms)330180136 (68+68)1005644 (22+22)Wattage of R5 (in watts)01020204056.5 Usually a solderin
6通道自動(dòng)逆向行駛燈順序迪斯科 6 Channel Auto Reverse Sequential Disco Running LightsFrom 230 V AC a DC supply of + 5 V is obtained. The power supply is given to the other blocks. The pulse generator
簡(jiǎn)單的LED電源項(xiàng)目電路 A power source for simple LED projectsLED's are great display tools. Their prices have decreased to a point where they are replacing more conventional light sources. In one sense
引言 JTAG(聯(lián)合測(cè)試行動(dòng)小組)是一種國(guó)際標(biāo)準(zhǔn)測(cè)試協(xié)議(IEEE 1149.1兼容),目前主要用于芯片內(nèi)部測(cè)試?,F(xiàn)在多數(shù)的高級(jí)器件都支持JTAG協(xié)議,如DSP、FPGA器件等。標(biāo)準(zhǔn)的JTAG接口是4線:TMS(模式選擇)、TCK(時(shí)鐘)、
作為一種新的、最有潛力的光源,LED照明以其節(jié)能、環(huán)保的優(yōu)勢(shì)越來越受到人們重視。加上國(guó)家和地方政府的政策鼓勵(lì),我國(guó)的LED照明產(chǎn)業(yè)進(jìn)入了加速發(fā)展階段,運(yùn)用市場(chǎng)迅速增長(zhǎng)。在室內(nèi)照明方面,用LED燈替代傳統(tǒng)的可調(diào)光
三自由度直升機(jī)可以應(yīng)用于飛行器控制系統(tǒng)的半實(shí)物仿真試驗(yàn)和性能測(cè)試等場(chǎng)合,用以模擬橫列式直升機(jī),即傾轉(zhuǎn)旋翼機(jī)的直升機(jī)狀態(tài)[1]。其控制系統(tǒng)屬于典型的多輸入-多輸出系統(tǒng),具有非線性和強(qiáng)交叉耦合性,不易用傳遞函
Knightrider lights for model carsThis simple circuit drives 6 LEDs in 'Knightrider scanner mode'. Power consumption depends mainly on the type of LEDs used if you use a 7555 (555 CMOS version).Here's
紅外遙控器干擾電路 IR Remote Control JammerBy Carl Don't like your little brother's TV channel selection? Hate the volume your wife sets the stereo at? Want to just annoy someone? This circuit does
紅外線遠(yuǎn)程控制電路 Infa-Red Remote ControlI have received a number of emails requesting schematics for infa-red remotes. So here is one. This remote transmits a tone using an infa-red LED. This tone i
步進(jìn)電機(jī)控制器電路 Stepper Motor ControllerI found this circuit in my files. I don't know where it came from, but it looks like I photocopied it from somewhere years ago. I have been told that it came
可控硅調(diào)光燈電路-TRIAC Light Dimmer This little circuit can be used to dim lights up to about 350 watts. It uses a simple, standard TRIAC circuit that, in my expirience, generates very little heat. Pl
我國(guó)新的《道路交通法》中,為維護(hù)道路交通安全,也明文規(guī)定了對(duì)駕駛速度、連續(xù)駕駛時(shí)間等。國(guó)外一些交通運(yùn)輸發(fā)達(dá)國(guó)家也制定這方面的國(guó)家統(tǒng)一法規(guī)。疲勞駕駛是公路汽車駕駛特別是高速公路上的“隱形殺手”,據(jù)相關(guān)統(tǒng)
通常音頻電路中包括濾波、耦合、旁路、分頻等電容,如何在電路中更有效地選擇使用 各種不同類型的電容器對(duì)音響音質(zhì)的改善具有較大的影響。 1.濾波電容 整流后由于濾波用的電容器容量較大,故必須使用電解電容。濾
本文介紹了一個(gè)便攜式自動(dòng)呼吸控制系統(tǒng),它基于飛思卡爾的8位MC9S08QG4 微控制器(MCU)而設(shè)計(jì)。它是便攜式的、可為人工脈搏血氧和呼吸監(jiān)測(cè)和控制的自動(dòng)化替代產(chǎn)品,可處理脈動(dòng)血氧計(jì)中獲得的動(dòng)脈氧氣飽和度的(SpO2)數(shù)據(jù)。在手術(shù)中僅需較少的人員干預(yù),特別是可在嬰兒手術(shù)中被使用。