@KC9UDX : Actually my project was not just for me and I sold some of them to people interested since there was some interest in it. Personally I would change the power supply but it would not be practical for lots of people interested. I'm sure I would hunt down a proper arrangement with tristate logic if I searched enough for less current consuming parts but the amount of wiring needed also distracted me. In the end I resorted to a hack for that project. See it here : http://www.tepetaklak.com/IRQHack64/