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
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
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
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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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.
🙂
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.
The 470uF(C4) directly to the meter will make most meters "hanging" up there.
Would not hurt to experiment a little with that one.
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
Attachments
I built this also - Rod Elliott Project 55. Works very fine.
I can upload PCB if needed.
regards Olaf
Attachments
Here are the files. The diodes I used are BAT46.
Have fun 🙂
regards Olaf
Have fun 🙂
regards Olaf
Attachments
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Really nice!. Meanwhile, I had nothing better to do, I made a layout of the ckt that I posted.
reg
Prasi
Attachments
simple one
Simple vu Meter Analog Circuit - HQEW.net
I think this is the circuit that our member Kaplaars uses in his beautiful little amps with Akai meters.
Simple vu Meter Analog Circuit - HQEW.net
I think this is the circuit that our member Kaplaars uses in his beautiful little amps with Akai meters.
This the exact circuit i made a layout, only I added stereo and rectifier+filter cap.
Thanks for posting
reg
Prasi
Hi Jan,
Here is the pdf of circuit I posted. I replaced the gnd plane with traces. Hope it is useful to you.
reg
Prasi
Thanks for the circuit Mr. Mile. I need to find if the chip is available. The layout is attached.🙂
reg
Prasi
Attachments
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Thank you Olaf !
Did you used the op-amp from the original 55 project or an equivalent one ?
Thank you Olaf !
Did you used the op-amp from the original 55 project or an equivalent one ?