Infrared Security Switch
This module consist of two parts one is sender parts and other is receiver part. As soon as there is a break in IR signal teh relay will on and you can load any thing on relay.

Transmitter Part:

Transmitter part is based on 4093 IC and Transmits Infrared Rays

Receiver Part:
Receiver part is based on 741 IC and Receives Infrared rays of transmitter from a maximum range of 10 Feet  to switch ON the Relay connected