Please forgive my ignorance on this.
Can someone, anyone explain to me why this device,
LM2940CT -5.0 P+
is a positive 5 volt regulator?
Check out the pic which I hope I deleted the inline pic
that never seems to be viewable. So I attached it at the end.
It sure looks like a minus 5 volt device to me.
What am I missing?
Cheers,
Can someone, anyone explain to me why this device,
LM2940CT -5.0 P+
is a positive 5 volt regulator?
Check out the pic which I hope I deleted the inline pic
that never seems to be viewable. So I attached it at the end.
It sure looks like a minus 5 volt device to me.
What am I missing?
Cheers,
Attachments
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It is simply a matter of accepting a simple fact. It was not the brightest of idea by TI to use the name "LM2940CT - 5.0" as some see the "-" as a minus sign. Officially it would have to be "-5.0" to indicate a negative voltage so all is OK.
https://www.ti.com/lit/ds/symlink/l...64379&ref_url=https%3A%2F%2Fwww.google.com%2F
https://www.ti.com/lit/ds/symlink/l...64379&ref_url=https%3A%2F%2Fwww.google.com%2F
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Just for reference...
Your image link was so long (probably over a million characters) that it was even stopping your attached image displaying correctly.
This is a fraction of 1% of your link in notepad 🙂 I have deleted it completely from your post as these things cripple the page loading times.
Attachments
In fact, it's NSC old naming scheme
https://pdf1.alldatasheet.fr/datasheet-pdf/view/8827/NSC/LM2940/+573JuIOzZKM-CN-+/datasheet.pdf
As reference give polarity it can't be mistaken but agree with you, I'm not sharing this "logic".
Well, whoever the manufacturer is then. It is even more stupid to copy name convention errors of others 🙂 Some things just seem to be invented to create misunderstanding. Why is the minus (-) on electrolytic caps indicated and then why the plus (+) on tantalum caps?
The link is not working OK.
The link is not working OK.
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^ Thanks 🙂 I'll be honest in that I don't really understand how that side of things work, only that whatever they are that they cause the page loading to freeze and they also stop other correctly attached images on the page from displaying correctly.
Thanks Mooly,
I did that in a few posts and then realized it just circles endlessly.
And when I edited to try and delete it, It wouldn't show up and
where I thought it was, it wasn't.
Altec9440, Jean-Paul, kodabmx
As I went through the data sheet looking for explanation there wasn't any. Yes on the initial page
it did say "positive regulator." But upon first seeing it installed with out data sheet and attempting
measurements...lead to WTF is going on?
As Mein deutscher Grossvater used to say, "Monkey-See, Monkey-Do." And then the inquisition would start.
"So, if so-and-so jumps into a camp fire, are you going to jump right in also?"
When trying to hunt down the P+ in some data sheet somewhere,
I recall seeing something about reverse polarity protection.
Cheers,
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It is a strange issue because it actually stops any other images attached in any other post on that page from displaying. They are not always easy to delete either because they are just so long. It takes ages and ages having dragged a cursor over it all for it to then scroll through to the end.
Hmm... that will select everything in the post but how would you then select just the part you want to delete and leave the rest?
It would actually be interesting to see if it would all select in one go... these things are unbelievably long.
It would actually be interesting to see if it would all select in one go... these things are unbelievably long.
> how would you then select just the part
What you want is a Programmer's Editor. Can be a snap in UltraEdit but not free; I have not tried a freeware code editor since I bought UE.
Several ways to do it. Select from here to Search-target. Code-folding.
Really hard to see why you should be installing sexy(?) software to mop-up problems on antique forum software. Especially since we "could" hook the insert-link function to reject links which cause indigestion.
BASE64 is a way to pass binary (arbitrary bytes) data through a text-only interface (1970s terminals, email even today). It is not what the forum or our browser expects here; it is probably a fall-back when nothing else seems acceptable.
What you want is a Programmer's Editor. Can be a snap in UltraEdit but not free; I have not tried a freeware code editor since I bought UE.
Several ways to do it. Select from here to Search-target. Code-folding.
Really hard to see why you should be installing sexy(?) software to mop-up problems on antique forum software. Especially since we "could" hook the insert-link function to reject links which cause indigestion.
BASE64 is a way to pass binary (arbitrary bytes) data through a text-only interface (1970s terminals, email even today). It is not what the forum or our browser expects here; it is probably a fall-back when nothing else seems acceptable.
And if I catch myself having done it, I have to remember to
not Submit Reply, but to "Back Arrow" out a few screens
so it won't take.