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DIY-7 Flashing Buzzer Kit | LED Flasher with Two-Tone Output

DIY-7 Flashing Buzzer Kit | LED Flasher with Two-Tone Output

DIY electronics kit whose LED flashes on and off while the speaker alternates between two tones
Q1 and Q2 multivibrator | Q3 and Q4 Darlington audio oscillator | 390K and 120K bias switch the pitch

滿千免運優惠(限郵寄和超商純取貨) on order

本賣場無實體店面，無提供自取服務，敬請見諒。 on order

NT$105
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Description
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Description

商品規格

工作原理
■Q1,Q2為一多諧震盪電路,Q1與Q2輪流ON OFF來控制LED之明與滅.
■Q3,Q4與390K,120K,0.04UF,33K接成一音頻 震盪電路,且Q3,Q4接成達靈頓電路,電流放大 率極大,故輸出音量大.
■D1與D2二極體是阻止正電壓加入Q3之基極.
■390K與120K為Q3之偏壓電阻,亦決定蜂鳴器之聲音.當偏壓為390K時聲音低,偏壓為120K時聲音高.由於二極體電阻相差大,且更因Q1與Q2之輪流ON OFF使Q3隻偏壓亦隨之改變為390K與120K,故喇叭有高低二種聲音輸出,再加上LED之一明一滅,即構成 閃爍蜂鳴器.





 

出貨清單

  • DIY-7 閃爍蜂鳴器套件 x 1
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Delivery Options

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  • Draft quotation

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  • Credit Card
  • Tcat (Collect on Delivery)
  • Pay on 7-11 Store Pickup (C2C)

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