Simple Doorbell

I think at present we cant see a house with out a doorbell.And also people use different types of doorbells.Today Im going to give you a nice and simple doorbell schema.Here I have used very common IC UM3481.And another thin is we can get different songs This Ic has the ability to generate more than 16 sounds.Normally we can use 1.5V to 3V to run this schema.

Note: 

# Do not use more than 3V.

# Build this schema on a PCB.

# As S1 switch use push to on switch.