> Totally great, thanks for sharing.> I really wish it had the three basic = dc/dc topologies... All pages are editable. You can turn them into anything you want :-). But not save them I think. Somebody hinted this may be based on a program which is available. Anyone? Ledt and right click and follow menus and your nose. You can edit delete add drag change parameters etc. I changed Diode Vf to a LED Vf etc for an example fpr someone. Saving would be good. R. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .