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Old 14th February 2010, 06:03 AM   #1
sled108 is offline sled108  United States
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Default DIY Dancing Needle Box

These were Too Neat to pass on, so I got 2..So Now, what do I have to Make to Feed them off my Speaker Jacks and make my own Stereo Power Meters? When they get here maybe I'll have a better Idea how they Work.
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Old 14th February 2010, 06:46 AM   #2
Mooly is offline Mooly  United Kingdom
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You need to determine the characteristics of the meter. Has it a built in shunt or series resistor that needs removing.

You can either do active or passive. Passive is easy, but not so sensitive. Active as expected uses some additional powered circuitry such as,
Peak Reading Audio Level Meter

Passive and active here,
VU And PPM Audio Metering
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