peterc

Re: All things Green Pre
« Reply #900 on: April 17, 2020, 08:32:08 AM »
Yep that is the meter schem. Pot is for Output level.

The LED levels were chosen so that the lowest level is at about -40dB and the top LED illuminates at +20dB.

-40 shows 'signal present'  and +20 is the overload level of most DAW hardware these days. I really like to see an LED on whenever there is audio through the preamp, hence my not using an LM3915 which has a much smaller dynamic range.

You can change the overall levels with the trimmer, but my instructions were to set the levels for the above conditions.

Hope this helps.
Peter
If opportunity doesn't knock, build a door.


Re: All things Green Pre
« Reply #901 on: May 24, 2020, 02:48:48 PM »
Hi Guys,
Finally I finished all of the wiring of my first DIY project, tested with microphone and it's works, and now want to start to do the calibration, so my question is, can i do it without scope? and how? Sorry, I'm really newbie :)

thanks in advance

Ipin


 

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