Thanks to all.
Matthias Weingart writes:
>Pins of LM337 TO220:
>left is adjust
>middle is Vin (same to mounting)
>right is Vout
Thank you. I did actually look at the data sheet after
receiving the reference from Uwe Zimmerman
>The datasheet explains everything you need to know:
>
>http://www.national.com/pf/LM/LM337.html
And there is much useful information there, but I ran in to the
problem I frequently do, which is nobody's fault, but which is sort of
like having the solution to a mystery novel torn out just as you get
to the ending.
In order for this information to be useful, I need some point
of reference just like anybody else which is why they have diagrams
and schematics. They are the best way to communicate that kind of
information. Unfortunately, they don't translate in to text at all
because many times, they are a small image file. Here is exactly what
I read from part of that data sheet as taken via screen capture. Note
the 8-bit characters rendered as Hex escapes. Sometimes, one can
figure those out by context so, while messy, it is not as bad as
scrambled or missing information. Text follows:
A New Production
Technique for Trimming
Voltage Regulators
Three\xadterminal adjustable voltage regulators such as the
LM317 and LM337 are becoming popular for making regu\xad
lated supplies in instruments and various other OEM appli\xad
cations. Because the regulated output voltage is easily pro\xad
grammed by two resistors, the designer can choose any
voltage in a wide range such as 1.2V to 37V. In a typical
example (Figure 1) the output voltage will be:
In many applications, when R1 and R2 are inexpensive \xb11%
film resistors, and the room temperature accuracy of the
LM117 is better than \xb13%, the overall accuracy of \xb15% will
be acceptable. In other cases, a tighter tolerance such as
\xb11% is required.
End of quote.
As you see, the information in figure 1 simply never happened.
About the only way around that is to grab somebody who knows what they
are looking at and have them look at the picture. There isn't any
mechanical way to handle pictorial information that works and is
practical.
--
Author: Martin McCormick
INET: [EMAIL PROTECTED]
Fat City Hosting, San Diego, California -- http://www.fatcity.com
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB CHIPDIR-L
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing).
