Need help

Hey guys, i need help making this project. Im going to use an ir beam to open and close a circuit (Switch), but i have no way of going about, can someone help me? Im new and i have some knowledge of electronics. I would need it so that when the beam is broken, the circuit is closed, and when the beam isnt broken, the circuit is open.

thx-teebaum

Sorry for double posting, but this might give u guys a better picture, all i need is to have the reciever release a constant pulse when the beam is broken, i will use a relay for the switch... can u guys help me get this done?

the design is pretty simple . use an modulated ir (use a 555 @ ~38KHz) and an IR receiver (commonly used in TVs named like TSOP). the received module gives out a low signal when it receives the IR .build the ckt around it.