We are doing a project where we are using single 12V power supply. We wanted to run +/-5V, +/-12V, and +3V on our single board to be derived from the single +12V power supply. Is there a single voltage regulator that can do this? Can you please give me some sites where I can get valuable information on designing power supplies and the EMI or EMC consideration? Thanks and more power to you all. __________________________________________________ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/ -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu