[sdiy] More Kraakdoos stuff

[rkmoore at memphis.edu]

If you find that the signal into the mixer is clipping too much you 
may consider connecting the jack to the opamp output instead of the 
output to the speaker.  I guess clipping isn't much of a problem for a 
noise toy like a cracklebox, though.  Ultimately, if it seems to work 
to your satisfaction and nothing is getting hot, then it may be ok.  

I wouldn't worry about electrocution.  The input to the mixer may be 
capacitively coupled or a fet input that isolates the external devices 
and prevents DC.  It should be now more dangerous than plugging a 
guitar into the mixer and then touching the strings, or touching the 
end of a 1/4" cable plugged into the mixer.  I use my cracklebox with 
a guitar combo amp frequently without problems.

Richard Moore


----- Original Message -----
From: Rafael_Cohen at prusec.com
Date: Thursday, June 2, 2005 8:36 am
Subject: [sdiy] More Kraakdoos stuff

> 
> Hey everybody,
> My Cracklebox is almost done and I have a couple questions about 
> it.  First
> off, it is sounding pretty good... except for the fact that it 
> picks up
> radio a little.  Not too bad, and it depends on if I'm going into 
> a mixer
> or straight into a speaker (less radio through the mixer).  Which 
> brings me
> to my other question... is there any danger of electrocution 
> because of
> going into the mixer?  I know that with only the 9V battery and a 
> speaker I
> am in no danger, but I get a little scared feeling in my stomach 
> when I
> plug into the mixer which is plugged into the wall and then start 
> fiddlingwith contact points.  I have been safe about it so far, 
> but I want to know
> if I can use my hands on it if I'm going into a mixer.
> 
> Also, re: the "line out" question, before I even tried anything 
> else, I
> just went straight from where the speaker would have been (my pac-tec
> enclosure is too small for a speaker) to the output jack and into 
> the mixer
> and it worked absolutely fine.  After all the fuss and emails about
> schematics, etc... I may try it with a little Shadio Rack 
> transformer I
> have, but it doesn't seem necessary.
> 
> I followed this schematic: www.eam.se/kraakdoos except I left off the
> optional C6 and I wired the LED up seperately.
> 
> The first few times I started it up it was in oscillation before I 
> eventouched anything, which threw me off, but that seems to have 
> stopped.
> Thanks for all your support with parts and stuff, everyone...
> Very satisfying making some noise last night.
> 
> 
> Rafael
> 
>