Analog VU meter driver

If the meter has the rectifiers built in, then a series dropping resistor might be enough to get you going. If you needed a few different ranges, it could be a switch and a resistor.

Just for easy numbers, assume 0 VU on the meter was set up for 1 V rms.
A 100 Watt amp puts out about 28 Vrms max. If you wanted the 28 volts to correspond to 0 VU, put a resistor of 27*1200=32400 in series.

The meter, with such a resistor would probably never move until the volume was really high...so, that's where you might want a range switch...

you could even use "decade engineering". Throw a decade resistor box in series with the meter, all of which is hooked across the speaker terminals...adjust the R downard from 33K until you have the desired sensitivity.

Akitika GT-101
 
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Thanks for the reply's you all,
I found an easy circuit, I've tested it and it works fine ! Circuits Online - Schakelingen - VU meter It seems to work from the line inputs.
:)

hi,
i am trying make a circuit based on the link you provided for stereo application and the same is attached. it would be nice if someone could comment on the same.
reg
prasi
 

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