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音乐三极管只有3个引出脚,外形与普通塑封三极管一样,如图1所示,而且具有放大作用,无需外加元件便可直接推动扬声器发出宏亮的声音。图2是它的常规用法,即为一典型的音乐门铃。其中,VT66A-S型音乐三极管平时处于静态通电(耗电仅1μA),按一下按钮S1,松开手后S1复位,内存一首乐曲奏完后立即停止;而VT66A-L型音乐三极管,工作时用常现开关S2代替S1如虚线所示。闭合S2通电后反复演奏乐曲,打开S2切断电源后乐曲才停止。如果对其引出脚灵活运用,便可用于各种控制电路中。
The music transistor has only three pins, the shape is the same as that of the ordinary plastic transistor, as shown in FIG. 1, and has an amplification function, which can directly push the loudspeaker to make a loud sound without additional components. Figure 2 is its usual usage, that is, a typical music doorbell. Among them, the VT66A-S-type music transistor is usually in the static power (power consumption is only 1μA), click the button S1, release S1 after the hand reset, the memory of a music stopped immediately after the play; and VT66A-L-type music transistor, work When the switch S2 is often used instead of S1 as shown by the dotted line. Closing S2 After powering on the song repeatedly, turning the S2 off will stop the song. If the pin out of its flexible use, can be used for a variety of control circuits.