Remote operated musical bell can be made combining the following circuits.
When a remote is pressed, the circuit plays a music.
a) Remote tester
Make the given circuit and press a normal TV remote control in front of TSOP1738, the LED will be switched on.
b) Basic RC circuit
You can use BC548 in place of BC547. Download datasheet of BC547.
c) Music Circuit using UM66 OR BT66
Remote operated musical bell