Showing posts with label MFOS. Show all posts
Showing posts with label MFOS. Show all posts

Thursday, 27 March 2025

My 5U sequencer setup

 Currently I have five sequencers in my large format 5U setup

1. Moog 960
2. Two q960 synthesizer dot com  sequencers
3. Klee
4. MFOS sequencer.

The MFOS is difficult to clock without a mod.
These modifications often involve using a simple op-amp circuit (like a TL072) and a CD40106 inverter to boost and shape the incoming clock signal.
In some cases two CD40106 hex inverters connected in series may be necessary in order to give the gates and triggers being fed to the MFOS gear CMOS characteristics.
The op-amp acts as a buffer and gain stage to amplify the incoming clock signal. The CD40106 then inverts the signal and shapes it into a clean square wave that the sequencer can understand.


Till I get around to doing this I've found that the output of the MFOS sequencer drives the others quite well. Here is the basic patch.



Thursday, 6 August 2020

MFOS Bi-polar Power supply

This is a excellent PSU


i'VE built an earlier one & it works well.



It uses LM78XX/LM79XX or LM78LXX/LM79LXX regulators
That is, it uses an AC output wall wart.
 DO NOT USE A DC OUTPUT WALL WART.




These are the parts needed:
1  LM7812 +12V Voltage Regulator  LM7812  U1  
1  LM7912 Voltage Regulator  LM7912  U2  
2  Resistor 1/4 Watt 5%  2.4K  R1, R2  
6  1N4004 General Purpose Rectifier  1N4004  CR1, CR2, CR3, CR6, CR4, CR5  
6  Capacitor Electrolytic  3300uF  C1, C2, C3, C6, C7, C8  
4  Tantalum Electro (35V)  1uF  C4, C5, C9, C10  
1  9 to 12 VAC Output Wall Wart  12VAC Output    
1  Optional SPST Switch  SPST    




Tantalum capacitors -- they are polarized.








Links:
http://musicfromouterspace.com/analogsynth_new/WALLWARTSUPPLY/WALLWARTSUPPLY.php

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For more Euro DIY builds click here:
http://djjondent.blogspot.com.au/2017/12/diy-index.html
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Saturday, 17 October 2015

DIY - Eurorack

This page is my index for all Eurorack related DIY.
It includes build notes, hacks, etc

GENERAL
+ Small Euro drum - version 1

Barton Musical Circuits (BMC).
+ BMC 037 - EuroBuffer (Buffered Multiple)
+ BMC - FM Drum - build notes

Bastl


Beast-Tek
 + Microbe 
 + Pixel Drum 

Befaco

Cat Full Of Ghosts
 
CGS
* Serge Resonant EQ/Filter - Euro format (CGS 202)
 

Division 6
+ Dual Sequencer

Doepfer
+ module 128 modification - Fixed filter bank

Duskwork

+ Faderbank -16n 
 
Greyscale

hEXINVERTER

Ian Fritz
 
Klee Sequencer

L1

Liquid Foam
 
Ljunggren Audio


LZX Video Industries
 + Function Generator - build pics & notes

LZX - Cadet
 + Cadet I - Video Sync Generator - Build notes
 + Cadet II - RGB Encoder - Build notes
 + Cadet III - Video input - build notes
 + Cadet IV - Dual Ramp generator - build notes
 + Cadet V - Scaler - build notes
 + Cadet VI - Fader - Build notes
 + Cadet VII - Processor -Build notes
 + Cadet VIII - Hard Key Generator - build notes
 + Cadet IX - VCO - build notes
 + Cadet X - Multiplier - Build notes

LZX - Castle
Introduction
00_000 ADC - Analog to digital converter
01_001 DAC - Digital to Analog converter
02_010 Clock VCO
03_011 Shift Register
04_100 Multi Gate
05_101 Quad Gate
06_110 Counter
07_111 Flip flops

Manhattan Analog
  + CVP (Control Voltage Processor)

 + Voltage memory - Meng Qi - build notes

Metromodular


 MI
+ Mutable Instruments - Grids Hack for clock & random gate.
+ Links - DIY build pics 

MFOS (Music from Outer Space)
+ Bi-polar Power supply

Music Thing Modular
 
Neutral Labs
 
NLC - Non Linear Circuits:
        + All NLC pages are here  
 
Ornament & Crime - O_C


Snazzy Effects
+ ArdCore -Installation Demo


Sonic Potions
 
ST-Modular


Steiner-Parker
Steiner-Parker MicroCon Voice - Eurorack - Build notes

SynthroTek  
 
 
 
 Westlicht

Zlob
Minimixer
Dual VCA
Dual VCO
Clock divider
Zlob SVF (State Variable Filter) - build notes