Hi and thanx to all the people for their wonderful help on my last problem. Unfortunately, down here they don't sell much stuff in electronics (you can't get a PCB for goodness sake..lol). Anyway, with the sound transmission eleminated, I thought of another thing. A very simple two piece device - when a switch is pressed on one device, an LED, or a small bulb should on on the other. Basically a wireless light switch. If not an LED / light circuit, I'm sure a buzzer/door bell wouldn't complicate matters that much (ie if the diagram is not available). The system of transmission between the two should be wireless - preferrably Infrared LED or through RF. The only problem with RF is getting both the transmitter and reciever to interact on the same frequency. I have only 3 weeks remaining to submit my project - pls help.... I really need this help. If possible, could the circuit diagram/ construction instructions be accompanied by the functions/uses of the respective devices. Thanx. Replies gr8ly appreciated.