AW: [sdiy] Trying to remember that chip

[Ullrich Peter]

>OK, I had this schematic.  It was based around a single chip.  There
were a
>couple of different versions of said chip.  Basically it was a multiple
LED
>driver based on an input voltage.  Seems like it had a pin where you
could
>select whether only one LED was lit, or all of the LEDs up to the
measured
>point.  I am thinking maybe it was available for linear measurement and
then
>a VU version.
>
>But, alas, I cannot find it anywhere.  My brain has gone into total
fade.
>Does this chip ring a bell with anyone?  I am sure I put that somewhere
good
>for future reference.  However, I am reaching that age I have trouble
>remember where I put stuff.  Sigh....  If I had a chip number, I guess
I
>could re-create my research.  I have seen someone here on the list
mention
>this chip before.

You mean the LM3914 LM3915 chips from National I think.
You are right there is a linear (I think the LM3914) and the logarithmic
(LM3915).

Forget the UAA 170 and UAA180 chips... they are old and don't work
nice...

Ciao
Peter

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                   Ing. Peter Ullrich         mailto:ullrich at kapsch.net
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