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Michael Black
 
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Default LM7812 semiconductor has zero volts in but still measures 12.12 volts out?

"Sofie" ) writes:
Michael Black:
Yes indeed, the output is pin 2.
Read carefully........


You're right! It just goes to show how long it's been since I looked
carefully at that pintout. I just remember input/ground/output.

In my favor, I just checked a Motoral databook (merely out of curiosity
about this curiosity) and they show the TO-220 78XX regulator as
I defined it.

I wouldn't even talk in terms of pin numbers on three terminals, it
seems less than useful. You can just as easily speak of input/ground/output


Michael