How to use UM66 or BT66 Musical IC

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The following schematic is for UM66 or BT66 musical IC. You need very few components to make this circuit.
Pin configuration for UM66 is given below:

Zener diode rated 3.3V maintains the required 3.3V for UM66 IC. The output from Vo of UM66 is amplified by BC547 transistor.

Click on the video to see the output

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14 COMMENTS

  1. Hi,my name is Satish. i just got on your site and to my great surprise your site is very good. i mean it is very explicit. it leave nothing to my imagination it’s really a great site for me. i am beginner in this field and i greatly appreciate your site. well can you help me by showing me how to convert a small voltage let say 3-9v into 220v.

    Thanks.

  2. i am working on doorbell project . i also need loud music.Can you please send me that cirucit diagram .do i need to use same speaker as specified in ckt(wattage,resistance) or is there any substitutuion or that.

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