Hi again, I'm going to try Russell's and Olin's method, as it's cheaper, and quicker for me to implement. snip +AD4- You can parallel 7805's by placing SMALL resistors in the OUTPUTS with a +AD4- smoothing capacitor both at the regulator outputs AND at the final combined +AD4- output. The resistors will make the output slightly lower and reduce the +AD4- regulation achieved. snip Thanks to everyone who contributed, and to all of you who make this list so enjoyable. Ricardo Medina -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body