Need Help Making Circuit

I am working on a small weekend project that involves taking the power from the location on the PCB in a keyboard where the LEDs were and making it act as a switch to a small remote control outlet (Something Like This: http://ecx.images-amazon.com/images/I/410y7UnyvdL.jpg )

I have tried using an LED glued to a photocell, though I am thinking it is somehow acting as a resistor and limiting the power that can go through. I have some transistors, What kind of a circuit can I rig up with them to make this work?

110100101108 years ago
the switched device and the led should have common earth. the transistor switches the device from the earth side the extra resistor is about 470 ohm for small npn txistor (like C945) at 5 V. if the led allready had resistor you should only add resistor so that together they are about 470 ohm the needed value may change depending on many factors
txistor.png
110100101108 years ago
still why not a transistor ? you can use it directly and not like the photo cell for stuff powered from low volt you dont need the relay
110100101108 years ago
you need small npn transistor and relay and very good isolation so that in no wai 110 / 240 V can get to the computer you can do this as well on the old printer port