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Author Topic: Guide: Stereo VU Meter  (Read 30156 times)

GideonX

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Guide: Stereo VU Meter
« on: July 31, 2003, 10:57:35 PM »

quickie, makes ya thump.

http://www.gideontech.com/guides/stereovu/LM 3916 tutorial 07.JPG">

Stereo VU Meter
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TemplaraPheonix

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Guide: Stereo VU Meter
« Reply #1 on: July 31, 2003, 11:23:43 PM »

As always another great project from GideonTech. One question...where does one get those sweet LM3914/LM3915/LM3916/s used in both the stero VU meter and the HD VU meter project?
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GideonX

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egarrard

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Guide: Stereo VU Meter
« Reply #3 on: August 01, 2003, 03:54:54 PM »

Is there any way to add a pot to it so it can be calibrated? Otherwise it's just blinking lights.
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jingoku

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Guide: Stereo VU Meter
« Reply #4 on: August 01, 2003, 04:20:50 PM »

The LM3916 has a 30 db sound range... if you add two or three together you can go to 60 db or 90 db.

No you can't... the IC is sensitive to the sound level... and it is accurate to about 1 db. Thus you do not need to calibrate it.

The only thing you can do is add a pot to change the intensity of the LED. If you want to do that you can add a 10k Pot. One end attached to ground while the other is attached to Pin #8.
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Black_Ops

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Guide: Stereo VU Meter
« Reply #5 on: August 02, 2003, 12:03:15 AM »

sure you could add a pot to calibrate it for signals over normal stereo (peak 1.25v if i rember correctly) line voltage. just setup a pot as a voltage divider

Code: [Select]

stereo in ---/\/\/\/\/\/--- gnd
                    ^
                    |
                    |
                  pin 5

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Skylined

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Guide: Stereo VU Meter
« Reply #6 on: August 02, 2003, 12:35:19 PM »

I think egarrard is talking about the fall speed, he would like to have a lil more delay. And I also do :)

jingoku: no resistors needed at the IC's output to limit the amperage?

I'm thinking of doing it, I'll put it in the same box with my Temp Display glued at the side of my monitor, but instead of 5mm leds I'll use 3mm and not that bright.

Last... Great idea and guide! Congrats jingoku. :)
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egarrard

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Guide: Stereo VU Meter
« Reply #7 on: August 02, 2003, 12:41:48 PM »

Thanks! Calibrating the input to it was what I meant. That looks like what the last post shows.

6-8 channels of these would really look great behind a smoked panel, monitoring surround sound, wouldn't they?
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CoLG

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Guide: Stereo VU Meter
« Reply #8 on: August 02, 2003, 05:46:18 PM »

sry im such an idiot but could someone please make a cicurit drawing for stereo?
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Skylined

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Guide: Stereo VU Meter
« Reply #9 on: August 02, 2003, 11:06:29 PM »

In mono you just have Ground and 1 Signal, while in stereo you have Ground and 2 Signals.

Mono


Stereo
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