How to make a loud bicycle horn at home

It is an easy electronic project .here I am going to describe how to make a loud musical bicycle horn or bell.using this circuit you can make also an easy melodious calling bell

The main component of this project is a rom IC Um 66 or Bt 66 which generate the great beethoven fur elise music

You need to make

• UM66 or BT66 IC
• 5 Volt mini audio amplifier board
• Resistor 1 k,270K
• 3X AA battery & battery holder
• Push switch
• A plastic container
• Some wire
• U clamp

Um66 Bt66 pin out

Connect all components as circuit diagram bellow

Circuit Diagram of Bicycle bell

Video tutorial of musical cycle bell