Proximity Door Bell..!!!!!

Requirements-:

1. IR Sensor
2. 9 volt battery with battery cap

3. Buzzer

4. X-meter(length) of wire

PROCEDURE-:

1. Connect the Gnd and Vcc of IR Sensor with Negative terminal and Positive terminal of the battery.

2. Connect a wire through output terminal(3rd Pin of the IR Sensor) and Negative terminal of the battery and Connect to the +ve and     -ve of the Buzzer.(The Length of the wire here depends on your Door width.

3. Use Cardboards and make a box like structure now Attach it to the Door.
 
4. Done

Diagram-: