Cracklebox noisemaker

amz-fx · July 21, 2005, 10:00:26 PM

A very odd diy noisemaker project:

http://www.eam.se/kraakdoos/

Enjoy!

-Jack

slotbot · July 22, 2005, 12:13:53 AM

my friend has one of these. hours of entertainment.

Ge_Whiz · July 22, 2005, 01:56:58 PM

Quote from: slotbotmy friend has one of these. hours of entertainment.

Really? Has s/he tried humming or whistling instead? Or maybe a Swanee Whistle?

inverseroom · July 22, 2005, 06:51:02 PM

I've been wanting to make one of these for a long time...but where the heck do you get a 709 op amp? Apparently you really do need the old round one. Is there a drop-in replacement that works?

Tim Escobedo · July 22, 2005, 07:46:09 PM

Has anyone here built one of these? The Krakadoos has been lingering on the SDIY list for a while, but frankly, the samples are underwhelming. The same effect could be had from a single Schmitt trigger oscillator. I figure those touch spots should be doing something more exciting.

nordine · July 22, 2005, 09:21:08 PM

i second that,
the trinegistor (moosapotamus.com) is way "funnier"

Coriolis · October 20, 2005, 12:13:42 PM

I tried building one - found an LM709 in a 14-pin DIP (think it was 14) and found a datasheet as well, but I could never get the damn thing to work. Wrong pinout maybe?
And Tim, could you elaborate on "doing the same thing with a single schitt-trigger"? How would I do that?

C

puretube · October 20, 2005, 12:36:39 PM

Quote
...could you elaborate on "doing the same thing with a single schitt-trigger"?...

RDV · October 20, 2005, 12:45:14 PM

I made some interesting schitt trigger sounds myself just this morning.

RDV

Tim Escobedo · October 20, 2005, 02:22:07 PM

http://www.musicfromouterspace.com/analogsynth/mmlogic.html

Note the square wave oscillator at the bottom of the page. Replace the resistor with two conductive "touch points". Two brass screws, one wired to the input, the other to the output. Bridging the two "touch points" with moist skin mskes the oscillator oscillate. You may have to mess with the capacitor value, as skin resistance can vary quite a bit-sweaty skin conducts much better than dry, cracked skin.

It would be hard to actually play a melody with such a gizmo. But Krakadoos type noisemaker isn't really about coherent melodies.

jrc4558 · October 20, 2005, 09:20:01 PM

For dry cracked skin Procter and Gamble recommends baby oil!

I can't stop laughing

at schitt-trigger. Sorry if it may seem inpolite, nothing to do with Coriolis, no offence.

Coriolis · October 21, 2005, 05:20:05 AM

Dammit! For once, I'm funny, and I'm not here to enjoy the attention!

Makes you wonder if there's more fun to be had in this hobby...how about "poop-filters" for microphones...?

But thanks for the link Tim, I certainly wouldn't be interested in playing little melodies, much more interested in "bringing the noise"...

"Laugh and learn" as they say...or...

C

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Cracklebox noisemaker