长宁区小型继电器AD16系列蜂鸣器性价比

    电路图箭头朝里：PNP单极管；箭头朝外：NPN的单极管小圆圈为插针。用一根杜邦线将插针与单片机引脚相连，单片机引脚输出低电平，单极管导通，e、c连通，形成回路，有源蜂鸣器发声；无源蜂鸣器需要（与蜂鸣器种类有关，实际使用时可测试）的音频信号，即产生一个不断的高低电平变化，高低电平变化频率为3、单片机I/O口驱动能力非常微弱，不可以通过单片机I/O口直接驱动蜂鸣器，必须通过外接驱动电路，使R39电阻，单极管和R19电阻构成电流的放大电路从而可以驱动蜂鸣器，而不是依靠单片机管脚驱动蜂鸣器4、占空比：高电平时间方波：高电平、低电平时间相同~：取反符号，将管脚输出电平状态取反含有上拉电阻，默认输出高电平。高低电平各延时一段时间。AD16-16系列蜂鸣器寿命长，耗能低，体积小，重量轻，可靠性好，造型美观和制造精巧，声音清脆警醒。长宁区小型继电器AD16系列蜂鸣器性价比

    34695-0100Molex38723-6502Molex41671-0011Molex39501-1016Molex501616-3585Molex52045-3045Molex34696-0100Molex38723-6504Molex41671-0023Molex39501-1017Molex501616-3985Molex52045-3245Molex34729-0080Molex38723-6506Molex41791-0774Molex39501-1018Molex501616-4185Molex52045-3645Molex34729-0120Molex38723-6510Molex41791-0832Molex39501-1019Molex501616-4585Molex52045-4045Molex34729-0121Molex38723-6702Molex41791-0834Molex39501-1020Molex501616-5185Molex52089-0519Molex34729-0160Molex38723-6703Molex41791-0853Molex39502-1002Molex501628-2191Molex52089-0719Molex34729-0200Molex38723-6705Molex41792-0511Molex39502-1003Molex501628-2791Molex52089-0819Molex34729-0201Molex38724-4908Molex41792-0515Molex39502-1004Molex501628-3191Molex52089-1219Molex34729-0202Molex38724-4912Molex41792-0530Molex39502-1005Molex501628-3391Molex52089-1419Molex34729-0203Molex38725-0004Molex41792-0532Molex39502-1006Molex501628-3591Molex52089-1619Molex34803-0211Molex38725-1114Molex42228-0494Molex39502-1007Molex501628-3991Molex52089-1719Mo。长宁区主营AD16系列蜂鸣器哪家好如果蜂鸣器是作为高声压报警用的，普通的两引脚电感还不能满足要求，一般会采用三脚抽头电感。

    48-0300Molex39-00-0182单粒=卷带39-00-0181Molex43045-1008Molex44769-1402Molex503148-1090Molex52746-1071Molex35564-2015Molex39-00-0183Molex43045-1009Molex44769-1601Molex503148-1690Molex52746-1171Molex35572-0600Molex39-00-0183Molex43045-1010Molex44769-1602Molex503148-2090Molex52746-1270Molex35572-1000Molex39-00-0183Molex43045-1011Molex44769-1802Molex503149-0800Molex52746-1271Molex35572-1100Molex39-00-0184Molex43045-1012Molex44769-2001Molex503149-1000Molex52746-1471Molex35573-0300Molex39-00-0185Molex43045-1012Molex44769-2402Molex503149-1200Molex52746-1571Molex35711-0210Molex39-00-0186Molex43045-1013Molex44796-8662Molex503149-1600Molex52746-1670Molex35711-0410Molex39-00-0207Molex43045-1014Molex44812-0002Molex503149-2000Molex52746-1671Molex35711-0710Molex39-00-0208Molex43045-1015Molex44812-0003Molex503149-2400Molex52746-1870Molex35711-1110Molex39-00-0209Molex43045-1016Molex44812-0004Molex503149-2800Molex52746-1871Molex35716-0110Molex39-00-0210Molex43045-1018Molex44812-0005Molex503150-5009M。

    5559-02P)Molex43045-1422Molex45481-0270Molex50-36-1678Molex52808-1370Molex35749-0810Molex39-01-2025(5557-02R-210)Molex43045-1424Molex45481-0283Molex50-36-1687Molex52808-1371Molex35749-0910Molex39-01-2026Molex43045-1425Molex45483-0130Molex50-36-1688Molex52808-1470Molex35749-1460Molex39-01-2026Molex43045-1426Molex45483-0087Molex50-36-1713Molex52808-1471Molex35750-0810Molex39-01-2026Molex43045-1600Molex45483-0078Molex50-36-1716Molex52808-1670Molex35750-0910Molex39-01-20405557-04RMolex43045-1601Molex45483-0418Molex50-36-1734Molex52808-1870Molex35750-1010Molex39-01-20405557-04RMolex43045-1602Molex45485-0093Molex50-36-1869Molex52808-2071Molex35750-1210Molex39-01-20405557-04RMolex43045-1606Molex45485-0224Molex50-36-1871Molex52808-2271Molex35750-1910Molex39-01-20405557-04RMolex43045-1609Molex45485-0223Molex50-36-2277Molex52808-2370Molex35750-4810Molex39-01-20415559-04PMolex43045-1610Molex45485-0128Molex50-36-2301Molex52808-3070Molex35760-7200Molex39-01-20415559-04PMolex43045-1612Molex45504-0。压无源蜂鸣属于容性负载器件，理想输入是双向方波通常记作：VP-P。

    比由pwm方波驱动的蜂鸣器发出的声音效果更好，没有杂音，从而改善了蜂鸣器音质。附图说明图1为本发明的蜂鸣器驱动电路的结构框图；图2为本发明的蜂鸣器驱动电路的电路原理图；图3为本发明的振荡回路的波形图；图4为本发明的振荡控制电路的逻辑示意图；图5为本发明的振荡回路在时刻的等效电路；图6为本发明的振荡回路在第二时刻的等效电路。具体实施方式为使本领域的普通技术人员更加清楚地理解本发明的目的、技术方案和优点，以下结合附图和实施例对本发明做进一步的阐述。如图1所示，在本发明一个实施例中，蜂鸣器驱动电路包括有依次连接的电源控制电路10、振荡控制电路20和振荡回路30，所述电源控制电路10与mcu连接，mcu输出高、低电平控制所述电源控制电路10导通或关断，从而控制蜂鸣器驱动电路与电源之间的电路导通或关断。当所述电源控制电路10导通时，所述振荡控制电路20控制所述振荡回路30振荡并于蜂鸣器两端产生正弦波信号和第二正弦波信号，所述正弦波信号和第二正弦波信号频率相同、相位相反。如图2所示，所述电源控制电路10包括有电阻r1和开关管q1，所述开关管q1的端与所述振荡控制电路20连接，所述开关管q1的第二端接地。节点支持方式-将蜂鸣片固定于约与陶瓷片直径同尺寸的环形结构内。长宁区小型继电器AD16系列蜂鸣器性价比

接通电源后，振荡器产生的音频信号电流通过电磁线圈，使电磁线圈产生磁场。长宁区小型继电器AD16系列蜂鸣器性价比

    35183-0217Molex38760-0304Molex43030-0001Molex44300-1200Molex502380-0300Molex52437-3071Molex35184-0200Molex38760-0308Molex43030-0001Molex44300-1400Molex502380-0400Molex52437-3072Molex35184-0300Molex38760-0312Molex43030-0001Molex44300-1600Molex502380-0500Molex52465-1071Molex35184-0400Molex38760-0404Molex43030-0002Molex44300-1800Molex502380-0600Molex52465-1671Molex35184-0590Molex38760-1103Molex43030-0002Molex44300-2000Molex502380-0700(配套502382-0770)Molex52465-1871Molex35184-0600Molex38769-0022Molex43030-0003卷带=43030-0009Molex44300-2200Molex502380-0800Molex52465-1871Molex35184-0700Molex38769-0207Molex43030-0003Molex44300-2400Molex502380-0900Molex52465-2071Molex35184-0800Molex38769-0220Molex43030-0003Molex44372-0002Molex502380-1000Molex52465-2471Molex35184-0900Molex38770-0102Molex43030-0004Molex44428-0401Molex502380-1100Molex52465-2671Molex35184-1000Molex38770-0103Molex43030-0004Molex44428-0402Molex502380-1200Molex52465-2871Molex35184-1100Molex38770-0104Molex43030-0005Molex44428-0601M。长宁区小型继电器AD16系列蜂鸣器性价比