STATIC SMD variant by FEEDBACK [NEW!]

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strat-1
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STATIC SMD variant by FEEDBACK [NEW!]

Post by strat-1 »

www.feedbackmodules.com

Image

MAIN PCB Top and Bottom
Image

POWER PCB Top and Bottom
Image

STATIC SMD is the SMD version of previous STATIC, with exactly the same features.
We are selling both variants, SMD and THT.

Like every module we developed in the past this new noise module was born out of our own necessities.
We needed some versatile noise sources in our own systems so decided to study the most interesting and useful designs from the past.
As probably many of you know white noise and pink noise are some well defined theoretical concepts and making some real world
implementations that follow exactly the theory is not an easy or cheap thing.
This is the reason why every synth manufacturer decided to take a cost effective and less precise route and make only an approximation
of the white and pink noise signals.
This is the reason why if you listen to the noise generators from different synthesizers or modules you will discover that they do not sound
exactly the same.
Knowing this, we decided to make a module with different methods of generation and also different sources of basic noise.
The MS noise is a white and pink noise generator based on transistor noise.
The ZN noise is a more complex circuit based on zenner diode noise with some interesting features.
The TR noise is based on digital shift registers used as noise generator but with a twist :)
While developing the project on breadboard we decided to add some interesting and useful features.
Our team mate Chrissugar had the idea to mod the TR circuit so it will change the sound of noise with a potentiometer from white noise
to a decimated/digitized chip tune like noise.
Also Chris suggested to add to the ZN noise a morph potentiometer and an additional out for a variable noise from pink to dark noise.
The random CV out is also an added useful bonus .
The result of our work is the STATIC module, a comprehensive collection of noise sources generated with different methods,
with many independent outputs and a few interesting add ons.
We are very pleased with this module and we hope it will satisfy not only our needs but also the needs of most eurorack enthusiasts.
The project is not very complex but it needs two out of production shift registers: CD4006 (or MC14006).

Audio outputs in order : MSwhite/Mspink/ZNWhite/ZNPink/DARK/MORPH/TR (Spectrum Knob turned/SW in both positions)



Noise through VCA with ADSR in the same order than previous recording.



STATIC SMD is available in two type of kits :

KIT1 :
- 2 x PCBs + Front Panel

KIT2 :
- 2 x PCBs + Front Panel
- 2 x MC14006 ICs
- 1 x 50KB pot
- 1 x 1MA pot
- 8 x Minijack sockets
- 1 x 6way Pinheader Male for 10/12mm spacer
- 1 x 6way Pinheader Female for 10/12mm spacer
- 4 x 1900h Cream Knobs

The SMD variant is noted rev 2.0 on the back because is the rev 2.0 version for built module.

We just released 3 new projects : Squeeze, CP3- and Static SMD.
Stay tuned for new projects in 1-2 months :)
Attachments
Static SMD Build Photos 1.0.zip
(8.07 MiB) Downloaded 5 times
Static SMD Build Files 1.0.zip
(39.48 MiB) Downloaded 9 times
Static SMD - POWER pcb.jpg
Static SMD - Module.jpg
Static SMD - MAIN pcb.jpg
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strat-1
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Re: STATIC SMD variant by FEEDBACK [NEW!]

Post by strat-1 »

Thank you GSE for this very explanatory and well made video :
1Dj4P's
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Re: STATIC SMD variant by FEEDBACK [NEW!]

Post by 1Dj4P's »

Hi,
I ended up the static module and it works fine but i would like to know how to choose de best 2N3904.
I installed a socket for the noise transistor to select one for best results but where can i check the waveform ?
Is it only appreciate by ear ?
Thanks for our help and the great modules you provide.
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Re: STATIC SMD variant by FEEDBACK [NEW!]

Post by EATyourGUITAR »

Is that second PCB there to keep the static from getting out?
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Re: STATIC SMD variant by FEEDBACK [NEW!]

Post by EATyourGUITAR »

1Dj4P's wrote: Tue Jul 06, 2021 10:50 am Hi,
I ended up the static module and it works fine but i would like to know how to choose de best 2N3904.
I installed a socket for the noise transistor to select one for best results but where can i check the waveform ?
Is it only appreciate by ear ?
Thanks for our help and the great modules you provide.
Use the soundcard of your computer or audio interface with a free FFT plugin like span.
https://www.voxengo.com/product/span/

If you have a good FFT on your oscilloscope you can use that but most oscilloscopes are 12 bit ADC. You can get a 16 bit ADC from picoscope if you require high precision measurement from a professional tool.
WWW.EATYOURGUITAR.COM <---- MY DIY STUFF
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