7812 and 7805 for powering a stamp and 2 IC''s
Archiver
Posts: 46,084
I was wondering (again with the 'wondering') about the drop too. It looks like
35V is the upper limit, is it just a matter of heat dissipation on a single
device rather than spread over two?
Kevin
timevex@o... wrote:
>
> Kevin,
>
> Yes, I need 12v for a relay. I should have used a 5v relay then I'd
> be all set to use just 5v. But droping 20v down to 5v seems, like a
> large drop. But since the current is so low, I could problally get
> away with it. I may replay the 12v relay with a 5v and get rid of the
> 7812 all together.
>
> Tim
>
35V is the upper limit, is it just a matter of heat dissipation on a single
device rather than spread over two?
Kevin
timevex@o... wrote:
>
> Kevin,
>
> Yes, I need 12v for a relay. I should have used a 5v relay then I'd
> be all set to use just 5v. But droping 20v down to 5v seems, like a
> large drop. But since the current is so low, I could problally get
> away with it. I may replay the 12v relay with a 5v and get rid of the
> 7812 all together.
>
> Tim
>