闵行区控制箱AD16系列蜂鸣器厂家直销
ex502380-1300Molex52465-3071Molex35184-1200Molex38770-0105Molex43030-0006Molex44428-0602Molex502380-1400Molex52465-4071Molex35184-1400Molex38770-0106Molex43030-0006Molex44428-0801Molex502380-1500Molex52480-4810Molex35189-0110Molex38770-0107Molex43030-0007袋装(43030-0001卷)Molex44428-0802Molex502381-0000Molex35189-0200Molex38770-0108Molex43030-0008Molex44428-0803Molex502381-0000Molex52484-0310Molex35189-0201Molex38770-0109Molex43030-0009单粒=卷带43030-0003Molex44428-1001Molex502382-0270Molex35189-0210Molex38770-0110Molex43030-0010单粒=43030-0004Molex44428-1002Molex502382-0370Molex52484-0510Molex35189-0261Molex38770-0111Molex43030-0011Molex44428-1201Molex502382-0470Molex52484-0510Molex35189-0274Molex38770-0112Molex43030-0012Molex44428-1202Molex502382-0570Molex52484-0710Molex35189-0281Molex38770-0113Molex43030-0053Molex44428-1401Molex502382-0670Molex52484-0810Molex35189-0290Molex38770-0114Molex43031-0001Molex44428-1402Molex502382-0770Molex52559-0652Molex35189-0360Molex38770-0115Molex430。额定绝缘电压:AC440V , 连续工作寿命:≥30000h。闵行区控制箱AD16系列蜂鸣器厂家直销
单片机综合学习系统之继电器、蜂鸣器篇《电子制作》2007年12月站长原创,如需引用请注明出处9.4蜂鸣器实验在很多的单片机系统中除了显示器件外经常还有发声器件,常见的发声器件是蜂鸣器。蜂鸣器一般用于一些要求不高的声音报警及按键操作提示音等场合。蜂鸣器的形状一般如图9-11所示。虽然它有自己的固有频率,但是它也可以被加以不同频率的方波,从而编制一些简单的音乐。图9-11蜂鸣器实物图9.4.1实例功能本实例就是来实现蜂鸣器发声,通过本小节的实验,可以使读者熟练掌握蜂鸣器的应用。图9-12蜂鸣器实验演示图9.4.2器件和原理蜂鸣器和普通扬声器相比,重要一个特点是只要按照极性要求加上合适的直流电压,就可以发出固有频率的声音,因此使用起来比扬声器简单。由此可知,蜂鸣器的控制和LED的控制对单片机而言是没有区别的。9.4.3硬件电路虽然蜂鸣器的控制和LED的控制对于单片机是一样的,但在硬件电路上却有所不同,因为蜂鸣器是一个感性负载,一般不建议用单片机I/O口直接对它进行操作,所以好加个驱动三极管,在要求较高的场合还会加上反相保护二极管。闵行区控制箱AD16系列蜂鸣器厂家直销按键按下、开始工作、工作结束或是故障等等。这里对单片机在蜂鸣器驱动上的应用作一下描述。
=巻带39-00-0300EOL)Molex43045-1221Molex44914-1003Molex503480-1400Molex52807-0310Molex35745-0110Molex39-00-0302Molex43045-1222Molex44914-1201Molex503480-1600Molex52807-0410Molex35745-0210Molex39-00-0307Molex43045-1223Molex44914-1202Molex503480-2000Molex52807-0610Molex35745-0210Molex39-00-0308Molex43045-1224Molex44914-1601Molex503485-0000Molex52807-0810Molex35745-0310Molex39-00-0339(=卷39-00-0338)Molex43045-1225Molex44914-1603Molex503485-0000Molex52807-0910Molex35745-0410Molex39-00-0342Molex43045-1226Molex44914-2401Molex503500-0991Molex52807-1010Molex35746-0110Molex39-00-0372Molex43045-1400Molex44914-5403Molex50350-9001Molex52808-0470Molex35746-0210Molex39-00-0380Molex43045-1401Molex44914-5803Molex50350-9101Molex52808-0471Molex35746-0210Molex39-00-0428Molex43045-1402Molex44914-6003Molex50351-8000Molex52808-0571Molex35746-0210Molex39-00-0429Molex43045-1406Molex44915-0001Molex50351-8000Molex52808-0670Molex35746-0310Molex39-00-0430Molex43045-1407Molex44915-0011Molex50351-8100Molex52808。
503398-001)Molex52806-1010Molex35725-4710Molex39-00-02821189TMolex43045-1212Molex44914-0201Molex503469-0200Molex52806-1110Molex35725-4810Molex39-00-02821189TMolex43045-1213Molex44914-0401Molex503471-0200SD-503471-001Molex52806-1210Molex35725-5110Molex39-00-0283Molex43045-1214Molex44914-0402Molex503473-0200Molex52806-1310Molex35727-0201Molex39-00-0283Molex43045-1215Molex44914-0601Molex503474-0200Molex52806-1410Molex35728-0201Molex39-00-0284Molex43045-1216Molex44914-0602Molex503480-0400Molex52806-1610Molex35730-3010Molex39-00-0285Molex43045-1218Molex44914-0801Molex503480-0600Molex52806-2010Molex35730-3140Molex39-00-0286Molex43045-1219Molex44914-0802Molex503480-1000Molex52806-2410Molex35740-1310Molex39-00-0296Molex43045-1220Molex44914-1001Molex503480-1200Molex52806-3010Molex35745-0110Molex39-00-0297。蜂鸣器的电路图形符号 蜂鸣器在电路中用字母“H”或“HA”(旧标准用“FM”、“LB”、“JD”等)表示。
阶梯值和阶梯区间阶梯电价方案的一种设置参数,阶梯值为D单位为kWh,阶梯区间是一个用电量的范围,单位为kWh。当阶梯值的数量为N时,可以将用电量范围划分为N+1个阶梯区间。2.阶梯电价管理方案阶梯电价管理方案包含确定阶梯值和对应的阶梯电价。例1:某阶梯电价方案确定3个阶梯值为D1、D2、和D3(单位为:kWh)。按照3个阶梯值划分的4个阶梯区间为W0、W1、W2、W3和确定对应的4个阶梯电价J0、J1、J2、J3,各阶梯区间的范围分别为:0≤W0≤D1、D1D3;阶梯电价单位为元,有两种表示方法:一种是直接的阶梯区间用电量的价格J0、J1、J2、J3,另一种是用阶梯电价与常规电价的差价表示方式:J'0、J'1、J'2和J'3,其中:J'0=0、J'1=J0-J1、J'2=J1-J2、J'3=J2-J3。阶梯电价与常规电价的差价表示方式用于阶梯费率电价管理比较方便。阶梯电价与常规电价的差价可以是正数、0或负数。1.功能用户持IC卡到供电部门交款购电,供电部门用售电管理机将购电量写入IC卡中,用户持IC卡在感应区刷非接触式IC卡(简称刷卡,下同),即可合闸供电,供电后将卡拿走。当表内剩余电量等于报警电量时,拉闸断电报警(或蜂鸣器报警),此时用户在感应区刷卡即可恢复正常,此时用户在感应区刷卡即可恢复供电。源蜂鸣器没有内部驱动电路,有些公司和工厂称为讯响器,国标中称为声响器。闵行区控制箱AD16系列蜂鸣器厂家直销
在一些特例中,可以和LED复用一个控制口 有源蜂鸣器的优点是:程序控制方便。闵行区控制箱AD16系列蜂鸣器厂家直销
lex35023-0008Molex38729-1357Molex42815-0031Molex39520-0012Molex501645-4020Molex52147-0210Molex35023-0009Molex38729-1405Molex42815-0032Molex39520-0014Molex501646-1000Molex52147-0310Molex35047-9802Molex38729-1406Molex42815-0041Molex39520-0102Molex501646-1200Molex52147-0410Molex35053-9002Molex38729-1429Molex42815-0042Molex39520-0116Molex501646-1400Molex52147-0510Molex35068-9702Molex38729-1455Molex42816-0212Molex39520-0208Molex501646-1600Molex52147-0610Molex35068-9722Molex38729-1455Molex42816-0212Molex39520-5107Molex501646-1800Molex52147-0710Molex35068-9802Molex38729-1509Molex42816-0312Molex39522-0004Molex501646-2000Molex52147-0810Molex35068-9812Molex38729-1540Molex42816-0412Molex39522-0006Molex501646-2200Molex52147-1010Molex35068-9822Molex38729-1615Molex42816-0412Molex39522-0015Molex501646-2400Molex52147-1210Molex35068-9842Molex38729-1617Molex42816-0512Molex39522-1002Molex501646-2400Molex52147-1310Molex35068-9902Molex38729-1624Molex42816-0612Molex39522-1003Molex501646-2600Molex52147-141。闵行区控制箱AD16系列蜂鸣器厂家直销