You will need a 490 MicroLink and a 282-M or 283-M emitter (the 283 gives off visible light when it is emitting IR). You will also need to supply some form of voltage regulation for the 490, since it is intended to run on 12 volt from a regulated supply. This can be done very simply with a couple of 6 volt zener diodes and a resistor to provide current limiting. Let me know if you need help sorting it out (light soldering skills required ).