Talk:7812 (integrated circuit)

Regulation of negative voltages
Yes, you can use a positive voltage regulator to regulate negative voltages if you connect it the right way. See the datasheet for an example. What you *can't* do is get *both* positive and negative voltages from the same center-tapped transformer, sharing a common zero-volt line: that's why the 79xx series are needed.

Merger
(See discussion on merger in Talk:7805) I have put up a new page as 78xx which covers the whole family, and also fleshes out the article a fair amount. If there are no objections, in a little bit I will switch 7805 and 7812 to redirect to 78xx instead. Let me know what you think. -- Foogod (talk) 20:57, 25 February 2008 (UTC)