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。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。闵行区直供AD16系列蜂鸣器费用是多少

    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。闵行区直供AD16系列蜂鸣器费用是多少适用于电力、电讯、机床、船舶、纺织、印刷、矿山机械等设备的线路中的声音信号。

    本发明涉及家电声音处理领域，尤其涉及一种蜂鸣器驱动电路。背景技术：现在蜂鸣器家电领域和工控领域的应用越来越，小到用作简单家电的提示音蜂鸣，大到中央空调的提示音乐，蜂鸣器作为一种人机交互的重要信息传递元器件，在相当一段时间内必当占据重要地位。目前，蜂鸣器的驱动方案主要是采用mcu直接输出pwm方波来驱动，这种方式目前使用较广，但也有一些无法避免的缺点：1.占用主控mcu资源，使得额外增加蜂鸣器模块时不利于使用和调试。2.采用pwm方波驱动的蜂鸣器产生的声音音色单一、音调尖锐、音质差。3.在有限且固定的供电电压的情况下，采用直接pwm波驱动的蜂鸣器两端压差受到供电电压的限制，进而限制蜂鸣器的音量。技术实现要素：本发明所要解决的技术问题在于提供一种蜂鸣器驱动电路，该蜂鸣器驱动电路能够节省mcu资源以及改善蜂鸣器音质。为解决上述技术问题，本发明采用如下所述的技术方案：一种蜂鸣器驱动电路，其包括有电源控制电路、振荡控制电路和振荡回路，所述电源控制电路与mcu连接，mcu输出高、低电平控制所述电源控制电路导通或关断，当所述电源控制电路导通时，所述振荡控制电路控制所述振荡回路振荡并于蜂鸣器两端产生正弦波信号和第二正弦波信号。

    =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。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。

    375Molex43025-0200Molex44170-0003Molex502250-2391Molex52271-2279Molex35156-0800Molex38759-0376Molex43025-0400Molex44193-0003Molex502250-2791Molex52271-2479Molex35156-0900Molex38759-0404Molex43025-0600Molex44193-0004Molex502250-3391Molex52271-2479Molex35156-1000Molex38759-0415Molex43025-0600Molex44206-0001Molex502250-3591Molex52271-2679Molex35156-1100Molex38760-0102Molex43025-0608Molex44206-0007Molex502250-3991Molex52271-2869Molex35156-1200Molex38760-0103Molex43025-0800Molex44248-0001Molex502250-4191Molex52271-2879Molex35164-0500Molex38760-0104Molex43025-0800Molex44248-0029Molex502250-5191Molex52271-3069Molex35165-0100Molex38760-0105Molex43025-0804Molex44248-0030Molex502350-1500/BKNMolex52271-3079Molex35180-0400Molex38760-0106Molex43025-1000Molex44248-0033Molex502350-2300/BKNMolex52418-0410Molex35180-0409Molex38760-0107Molex43025-1200Molex44248-0058Molex502350-3100/BKNMolex52418-0810Molex35180-0600Molex38760-0108Molex43025-1200Molex44248-0085Molex502350-3700/BKNMolex52418-0910Molex351。制备电磁铁Ｍ：在长约6厘米的铁螺栓上绕100圈导线。长宁区供应AD16系列蜂鸣器性价比

周边支持方式-将蜂鸣片外径边缘固定于共振腔内，一般采无回授式蜂鸣片。闵行区直供AD16系列蜂鸣器费用是多少

    0Molex35150-0290Molex38731-7204Molex42819-3233Molex39530-0509Molex501876-2040Molex52207-1160Molex35150-0292Molex38731-8914Molex42819-3242Molex39530-5006Molex501876-2240Molex52207-1185Molex35150-0292Molex38731-9112Molex42819-4212Molex39530-5007Molex501876-2440Molex52207-1260Molex35150-0300Molex38731-9308Molex42819-4222Molex39531-0002Molex501876-2440Molex52207-1285Molex35150-0309Molex38731-9503Molex42819-4232Molex39531-0003Molex501876-2640Molex52207-1385Molex35150-0310Molex38731-9802Molex42819-5212Molex39531-0004Molex501876-2840Molex52207-1460Molex35150-0319Molex38731-9903Molex42819-6212Molex39531-0005Molex501876-3240Molex52207-1485Molex35150-0390Molex38732-1309Molex42819-6232Molex39531-1002Molex501876-3440Molex52207-1560Molex35150-0390Molex38732-2105Molex42820-2212Molex39531-1003Molex501876-3640Molex52207-1585Molex35150-0392Molex38732-2304Molex42820-2213Molex39531-1004Molex501876-3840Molex52207-1590Molex35150-0392Molex38732-2502Molex42820-2222Molex39531-1005Molex501876-4040Molex52207-。闵行区直供AD16系列蜂鸣器费用是多少

免责声明： 本页面所展现的信息及其他相关推荐信息，均来源于其对应的用户，本网对此不承担任何保证责任。如涉及作品内容、 版权和其他问题，请及时与本网联系，我们将核实后进行删除，本网站对此声明具有最终解释权。