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DIY Musical Bell

Learn how to make a simple musical bell using the UM66T melody generator IC.

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The Melody Generator will play Beethoven's Für Elise when triggered since it uses the UM66T-19L.

Learn how to make a simple musical bell using the UM66T melody generator IC.

The Melody Generator will play Beethoven's Für Elise when triggered since it uses the UM66T-19L. There are different versions of this IC, each configured to play a different tune.

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  • 1
    Parts & Tools

    Electronic Components:

    Tools:

    You can also Buy the PCBPCBWay

  • 2
    UM66T Explained

    The UM66T otherwise known as the BT66T a CMOS LSI designed for musical applications and has an on-chip ROM containing a musical tune. The device has very low power consumption (around 180mW) since it is fabricated using the CMOS process. The IC includes an inbuilt oscillation circuit. Hence a compact melody module can be constructed with only a few additional components.

  • 3
    Working

    An input trigger enables the tone generator unit which in turn drives an external speaker unit. The tone generator unit consists of the Oscillator, Rhythm generator, Tempo generator and ROM. The oscillator frequency is used as a time for tone and beat generators. Its accuracy affects the quality of the music.

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Ken Yap wrote 05/01/2019 at 00:27 point

👍 for spelling Für Elise correctly. On the mfr's data sheet, they call it For Alice, hahaha.

  Are you sure? yes | no

Electro Guruji wrote 05/01/2019 at 06:45 point

It's German for "For Elise". The song was written for a lady called Therese (nicknamed Elise) that Beethoven wanted to marry in 1810.

- Wikipedia

  Are you sure? yes | no

Ken Yap wrote 05/01/2019 at 06:48 point

I know. Just amused by the mfr's datasheet.

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