Analog VU meter driver
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.
This one might work for you.
VU And PPM Audio Metering
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.
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.
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.
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