s8550驱动蜂鸣器
时间: 2023-10-30 21:25:33 浏览: 217
使用S8550三极管来驱动蜂鸣器是一种常见的方法。S8550是一种PNP三极管,可以提供1A的输出电流,足以驱动蜂鸣器。在WSF-51DB开发板上,可以使用GPIO口来控制S8550的导通与截止,从而来控制蜂鸣器。当向P0.7写入逻辑1时,P0.7输出高电平(3.3V),S8550的基极电流为0,此时S8550处于截止状态,蜂鸣器不发声。当向P0.7写入逻辑0时,P0.7输出低电平(0V),S8550的基极电流流过一个限流电阻,使得S8550导通,蜂鸣器发声。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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