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From: aieta@ils.nwu.edu (Michael Aieta)
Newsgroups: sci.electronics
Subject: Microampere meters for audio signals?
Message-ID: <91@anaxagoras.ils.nwu.edu>
Date: 3 Dec 90 19:24:05 GMT
Sender: news@ils.nwu.edu
Reply-To: aieta@ils.nwu.edu (Michael Aieta)
Organization: The Institute for the Learning Sciences
Lines: 19

Does anyone have any suggestion as to how I might use a set of old
meters which are labeled Microamperes to simply move back and forth like
VU meters by applying an audio signal to them somehow?

They say direct current on them, have two big posts marked + and -, the -
has a resistor tied to the rack mount chassis, and the needles point straight
up at 0 and are marked to 200 above and below.

Assuming my audio signal coming out of a mixer is a signal between +- 1V or 5V
between the two leads, do I just need a 10K Ohm Resistor between one lead of
my audio signal and the meter.  Does the meter go in parallel with the
resistor?
In series?

I don't care too much about measurement accuracy, just some peak to peak
movement.

Michael Aieta - aieta@ils.nwu.edu    The Institute for the Learning Sciences
Northwestern University 	                                Evanston, IL


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