first I just want to say: DON'T BUY THE PARTS AND START BUILDING THIS THING YET! and then, the preliminary schematics is at http://www.acc.umu.se/~el97msn/electro/irlink and the IR-receivers are Siemens SFH-506-30 and SFH-506-56. >yes please tell us the part number and manufacturer and also, do you >have a web page and scematics?