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Old 15th July 2010, 09:39 AM   #1
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Join Date: Jan 2010
Default connect my analogue VU meter after Preamp?


I have a set of DIY preamp + tone control circuit and also a power amplifier circuit. After testing it works. But now i would like to add in an analogue VU meter (-20 till 5+) for each L-R channel. After reading some thread i know that my VU meter works on DC. So i cant connect the VU meter to the speaker + and - because speaker works with AC.

So what if i connect my two VU meter + leg to the output of the preamp and - to the GND. Does this work?

thank you.
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Old 15th July 2010, 11:33 AM   #2
AndrewT is offline AndrewT  Scotland
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Join Date: Jul 2004
Location: Scottish Borders
VU meter is short for Volume Units meter.
That must surely read signal AC and convert to a dial reading of Volume Units.

Check again to see if your "VU" meter only detects DC voltage/current.
regards Andrew T.
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Old 15th July 2010, 11:42 AM   #3
Joschl is offline Joschl  Germany
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Location: Ruhrgebiet
An analog VU meter need additional circuits to make it funktion. A minimum to make the meter move (just for show) would be a rectifier before and a cap across the the VU meter.
Check ESP for a decent schematic for analog VU meter. Also a nice basic read on this topic there.
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