wrote:

I would like to build an analog volume meter (moving needle type)
using moving needle gauges like this
http://en.wikipedia.org/wiki/Image:VU_Meter.jpg
scavenged from a dead mixer's VU meter.

It would plug into the headphone jack on a set of computer speakers
and monitor the right/left sound volumes independently.

Can anyone point me to a good website or book with schematics or plans
on building this?

How about LED bar-graph VU meter? Fairly easy to make, using these:

http://www.national.com/mpf/LM/LM3915.html

or

http://www.national.com/mpf/LM/LM3916.html

Check the full datasheet for example circuits.

dizzy wrote:

How about LED bar-graph VU meter? Fairly easy to make, using these:

http://www.national.com/mpf/LM/LM3915.html

Comes only vaguely close to meeting VU ballistics specs, which can be
very annoying at times. Fine for rough work, though.

Vellemann makes some inexpensive LED meter kids.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

"Scott Dorsey" wrote in message
...
dizzy wrote:

How about LED bar-graph VU meter? Fairly easy to make, using these:

http://www.national.com/mpf/LM/LM3915.html

Comes only vaguely close to meeting VU ballistics specs, which can be
very annoying at times. Fine for rough work, though.

Vellemann makes some inexpensive LED meter kids.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."


If the OP is determined to build something to use his analog meters, I suggest
the project at http://sound.westhost.com/project55.htm. Seems to be a
reasonable circuit and gives a decent description as well.

--
Dave M
MasonDG44 at comcast dot net (Just substitute the appropriate characters in the
address)

"In theory, there isn't any difference between theory and practice. In
practice, there is." - Yogi Berra