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-   -   Analog VU meter driver (http://www.diyaudio.com/forums/solid-state/227309-analog-vu-meter-driver.html)

Vrystaat 8th January 2013 01:06 PM

Analog VU meter driver
 
Gooday all,
Can anybody help with an easy driver circuit to drive analog VU meters. The amp has an output of +- 100watt and the meters I got from a Sony product. Their resistance is 1200 Ohms.

Thanks
Jan

Tajzmaj 8th January 2013 06:27 PM

This one might work for you.
Cheers
VU And PPM Audio Metering

djoffe 9th January 2013 01:47 AM

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

Vrystaat 10th January 2013 02:28 PM

VU driver
 
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.
:)

TANDBERGEREN 10th January 2013 02:42 PM

Nice one that one Vrystaat.
The 470uF(C4) directly to the meter will make most meters "hanging" up there.

Would not hurt to experiment a little with that one.

prasi 24th April 2016 05:45 AM

1 Attachment(s)
Quote:

Originally Posted by Vrystaat (http://www.diyaudio.com/forums/showthread.php?p=3319528#post3319528)
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

olafk 24th April 2016 11:17 AM

1 Attachment(s)
Quote:

Originally Posted by Tajzmaj (http://www.diyaudio.com/forums/showthread.php?p=3316813#post3316813)
This one might work for you.
Cheers
VU And PPM Audio Metering

I built this also - Rod Elliott Project 55. Works very fine.
I can upload PCB if needed.

regards Olaf

olafk 24th April 2016 11:48 AM

2 Attachment(s)
Here are the files. The diodes I used are BAT46.
Have fun :)

regards Olaf

prasi 24th April 2016 01:08 PM

Quote:

Originally Posted by olafk (http://www.diyaudio.com/forums/showthread.php?p=4691986#post4691986)
Here are the files. The diodes I used are BAT46.
Have fun :)

regards Olaf

Hi Olaf,
Thanks a lot. I will this one.
reg
Prasi

olafk 24th April 2016 02:28 PM

Little video.
https://youtu.be/ZuXf2pchZpA

regards Olaf


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