Infrared Security Switch
This module consist of two parts one is sender parts and other is receiver part. When the Buttom of Sender part is pressed, the relay switches ON at receiver end and when pressed again, the Relay switches OFF.

Transmitter Part:

Transmitter part is based on 555 Timer IC and Transmits Infrared Rays when Button is pressed

Receiver Part:
Receiver part is based on 4017 IC and Receives Infrared rays of transmitter from a maximum range of 10 Feet  to switch ON and OFF the Relay connected