[Morning_Star]

I found some designs for power amp clipping indicators but I'm looking for some line level output indicators.  Also looking for a soft limiter design like in the Apogee mini me.  Thanks for any help.

I looking to add this to the back end of a mic pre.

[volker]

http://www.groupdiy.com/index.php?topic=36177.0

[Morning_Star]

Thanks for the link but the website for soundskulptor isn't working in that thread and it's looks as if that's what I need.

[JPK]

Sorry for the website flu, it is back to work now.
The LED driving circuit is on page 2 of this PDF : http://www.soundskulptor.com/pdf/mp12-schematic.pdf
But no soft limit here.

[Morning_Star]

Yeah, No simple soft limiters around?

[Pynta Studios]

As for the soft clipping, well... for starters you could look for the schematic of a limiter, and set fixed parameters: 0 threshold, infinite ratio, fastest attack and release possible...

[bronski]

Hello,

nice circuit from soundskulptor. does anybody know how can i make the circuit more sensitive? for -10db consumer level (yes i have some -10db gear in my studio, so i want it to make switchable) it isnt sensitive enough.

Thanks

Olli

[Gert]

Sensitivity can be changed in lowering the value of R29 =more sens.

[bronski]

Hi Gert,

can this be correct?  lowering r29 doesnt show any effekt.

Olli

[Harpo]

Clip level threshold  is actually set for 3,63V by the voltage divider R26/R27.
For -10dB down you could try R27 as 3K9 for similar behaviour, or use a trimmer to adjust to your needs.
R28/R29 is setting threshold of signal present LED.

[skipwave]

http://www.groupdiy.com/index.php?topic=27302.0

You probably already looked here: http://gilmore2.chem.northwestern.edu/projects/limiter_prj.htm

Headphone soft clipper scheme could simply be scaled down for line-level (choose your standard/reference).

[bronski]

Hello,

thanks a lot. i've meanwhile set r28 & r29 to 82k, so the treshold for clipping and signal present is now approx the middle between -10db and +4db. the finetuning will done by two 50k trimmers and a switch in front of the schematic. works fine.

thanks a lot

[Morning_Star]

Hello,

thanks a lot. i've meanwhile set r28 & r29 to 82k, so the treshold for clipping and signal present is now approx the middle between -10db and +4db. the finetuning will done by two 50k trimmers and a switch in front of the schematic. works fine.

thanks a lot

Can you post your schematic or pcb when done?

[bronski]

Jo,

here's the schemo




Olli

Simple soft-start power switch

Started by DaxLiniere Drawing Board

looking for a schematic for a over clipping circuit

Started by versuviusx The Lab

ok what are the values for LED clipping indicator for colors

Started by versuviusx Drawing Board

soft clipping

Started by pucho812 Drawing Board