- SPU: AL-1FBW-a4qrhmkg[1]
- Specification: Active
- Specification: Passive
現在有很多人對有源蜂鳴器和無源蜂鳴器的概念不是很清楚，這裡做簡單介紹，希望對大家日後使用有所幫助。
注意，這裡的「源」不是指電源。而是指震盪源。
無源蜂鳴器的特點是：
1 無源內部不帶震盪源，所以如果用直流信號無法令其鳴叫。必須用2K~5K的方波去驅動它
2 聲音頻率可控，可以做出「多來米發索拉西」的效果。
3 在一些特例中，可以和LED復用一個控制口
有源蜂鳴器的特點是：
1 有源蜂鳴器內部帶震盪源，所以只要一通電就會叫
2 程序控制方便，單片機一個高低電平就可以讓其發出聲音，而無源蜂鳴器卻做不到。
每套重量約為6g
一 模塊描述
1 模塊採用9012三極管驅動
2 工作電壓3.3V-5V
6 設有固定螺栓孔，方便安裝
7 小板PCB尺寸：3.3cm * 1.3cm
二 模塊接口說明（3線制）
1 VCC 外接3.3V-5V電壓（可以直接與5v單片機和3.3v單片機相連）
2 GND 外接GND
3 I/O 外接單片機IO口
After sales information
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Procurement and delivery
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payment
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