It's a linear regulator, so the power (and heat) depends on the volatage dropped across the regulator and the current through it.
This is, of course, only true when powered by Vin or the Barrel Jack.
QuoteThis is, of course, only true when powered by Vin or the Barrel Jack.DVDdoug's statement is always true, as it is the law of physics.
Everything I said in my post is true as well.
QuoteEverything I said in my post is true as well.I beg to differ.What DVDdoug said is unconditionally true. You conditioned it on how it is powered. So it is not possible both of you can be true.
In the context of the original question, they are both true.
This is, of course, only true when...