connect my analogue VU meter after Preamp?

motbuddy · 15th July 2010, 09:39 AM

hi,

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.

AndrewT · 15th July 2010, 11:33 AM

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.

Joschl · 15th July 2010, 11:42 AM

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.
Br
Josch

15th July 2010, 09:39 AM	#1
motbuddy diyAudio Member Join Date: Jan 2010	connect my analogue VU meter after Preamp? hi, 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.

15th July 2010, 11:33 AM	#2
AndrewT diyAudio Member 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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15th July 2010, 11:42 AM	#3
Joschl diyAudio Member Join Date: Dec 2005 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. Br Josch

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