Remote operated musical bell can be made combining the following circuits.

a) Remote tester
b) Basic RC circuit
c) Simple Musical bell

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.

Click here to read about remote tester

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

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