Musical Door Bell Using Um66
How to make a musical doorbell circuit using UM 66 or BT 66 musical IC. How to make a beautiful musical sound bell at home for a school doorbell project.
UM 66 Musical IC With Speaker :- https://amzn.to/3sI59Aa
BC547 Transistor :- https://amzn.to/3gQmRMv
Push ON OFF Switch :- https://amzn.to/3oVu9CY
18650 Battery :- https://amzn.to/3HWQeZ7
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