I have recently purchased a book on optoelectronics. I am going to piece together and IR laser link. In theory it can work up to 1/4 mile away using the right lenses. It should work very well between 10 and 12 meters. I will soon be posting the data on my web page. Maybe someone would like to help with the Tx Rx flip-flopping? Greg (i haven't really moved in yet, it will be set up later this week.)