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NLC Eurorack power distroboard.

February 20, 2018, 2:26 am
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Some pics of the nonlinearcircuits distroboard.

What is covfefe? The tweet by Donald Trump that baffled the internet ...

 (n.) When you want to say "coverage" but your hands are too fat and small to hit all the letters on your keyboard.

Back to the build.
Notice the noise reducing capacitors. 

 I used 3.3K for the LED resistors

  ---------------------------------------------------------------------------------------------------Click here to return to the NLC Build Index:
http://djjondent.blogspot.com.au/2015/03/non-linear-circuits-ncl-index.html  
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dIVISION 6 - Business Card Sequencer

February 20, 2018, 3:19 am
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CMOS cookbook

February 21, 2018, 1:34 am
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Make Noise Krell patch

February 24, 2018, 7:51 pm
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Reminds me of the old Buchla Krell patches.
The name originates from the film Forbidden Planet
Its a 1956 American science fiction film produced by Nicholas Nayfack, directed by Fred M. Wilcox and starring Walter Pidgeon, Anne Francis and Leslie Nielsen.

This is self playing.

The Make Noise only has one random voltage source and one VCO, but it's still very flexible.

The film was groundbreaking as the first of any genre to use an entirely electronic musical score, courtesy of Bebe and Louis Barron.

Links:
+ Krell search

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Wasp - Synth tests.

February 25, 2018, 12:37 am
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This synth has been midified.

Using a Korg SQ-1 to trigger.

LOvely sounding filter.



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Jerusalem - Mount of Olives Cemetery, Israel.

March 12, 2018, 7:14 am
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This is the most important cemetery in Jerusalem. It started during the first Temple period and It is still being used today.


The cemetery contains anywhere between 70,000 and 2 or 300,000 tombs

 During the First and Second Temple Periods the Jews of Jerusalem were buried in burial caves scattered on the slopes of the Mount, and from the 16th century the cemetery began to take its present shape.
(Wikipedia)

..: According to Jewish tradition, it is here that the Resurrection of the Dead would begin. The Messiah would appear on the Mount of Olives and head toward the Temple Mount.


 Ariel view

WikiAir IL-13-06 039 - Mount of Olives.JPG
By Neukoln, CC BY-SA 3.0, Link

For more travel postcards click here:
http://djjondent.blogspot.com.au/2015/03/travel-postcards-index-my-travel.html
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Modular on the Lounge - second meeting

March 12, 2018, 7:24 am
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A great night had by all.

Visuals were provided with a LZV Vidiot video synth

Sat 10th March.
Wollongong, Australia.

A post shared by jono (@dj_jondent) on
We will try to hold these events regularly ... every 2 to 3 months

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Mutant Bassdrum - Hexinverter

March 19, 2018, 5:44 am
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Some picks of this great module i just finished building.

These aren't really build notes but I hope it will help others in their quest to build one of these.
Its not a difficult build at all.
All through hole components.

There are 2 PCBs. ... this is the lower.
The upper PCB holds the LEDs, pots etc.



Below are pics of the build process... working backwards.


 Be careful with the orientation of the vactrol.


Now I want to build all the drum modules. :-)

LINKS:
hEXINVERTER
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Bastl Grandpa - eurorack sampler - build

April 7, 2018, 2:49 pm
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Some pics of my Grandpa eurorack module build.
This is a sampler. Love the wooden panel.

 These aren't really build notes. See Bastl's official site for those.
http://www.bastl-instruments.com/grandpa-assembly/

 Though I hope some extra pics of my attempt to assemble it will help a bit more.
I usually put the IC sockets first then the resistors, etc etc.


 tHERE are 2 PCBs.


The upper board: Holds the jacks, pots, LED etc
..
A small mistake here. I soldered the LED display too close to the PCB.
It has long legs for a reason... so it can sit up against the panel.
You can still view the LED easily even if you did solder it against the PCB, but it will be even clearer if do don't.



tHE tricky bit .. soldering the SD card.




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bASTL - Grandpa expander - sampler -spa

April 7, 2018, 2:58 pm
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NLC Triad - Build notes - Triple Envelope Generator

April 9, 2018, 7:48 pm
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Looks like a nice compact EG module. It's in the Eurorack format.
"These are AR or AD generators that will fire on a trigger or a gate, giving envelopes up to approx 25 seconds. A single gate to input 1 will fire all 3 envelopes, when nothing is plugged into inputs 2 & 3."

There are three envelopes in the one package.

Andrew's Blog notes are here:
http://nonlinearcircuits.blogspot.com.au/2015/11/triad-triple-envelope-generator.html

His Build guide is here:
http://www.sdiy.org/pinky/data/TRIAD%20build%20guide.pdf

If you are using a gate to trigger the envelope, once the attack stage is over the envelope will stay high until the gate finishes and then it begins the release stage.

When building remember that the LEDs are an integral part of the circuit.
Andrew recommends I use ultra-or super-bright LEDs. So depending upon the V ON of my LEDs,
I may need to have to adjust the  LED resistors (1k or 4k7 resistors) to get envelopes hitting the desired voltage. The target is to get 5-7V envelopes.

Each module used three 555 timer chips.









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Caesarea - Israel

April 10, 2018, 6:18 am
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RYO - Penta Sequencer - Ljunggren Audio

April 10, 2018, 2:46 pm
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This is a really useful and compact Ljunggren Audio sequencer.
Just 5 steps, but its switchable to 4 & 3 steps.
I may end up using this more as a modulation source than a standard sequencer.
I purchased just the PCB and faceplate

The build is straight forward. Components are easy to find ... mostly mouser.
Just watch the height of the electro caps ... make sure you have enough clearance between the two boards. These are not build notes.
For detailed build notes check out Ljunggren Audio's great site.
http://ljunggrenaudio.com/products/sequencing.html

The sequencer can be powered off 15V (though I'm building this version for Euro's 12V standard).
You can also adjust the CV output voltage ranges. This sequencer is set to 0-5V but its possible to change it to ranges like 0-10V (Buchla ?? etc )
http://ljunggrenaudio.com/products/penta%20modifications.html

bELOW are some pics of the components I used.... from mouser.






The yellow electrical tape is a bit of protection against any shorts between the two boards .. the electro caps I used were too tall.

Leds.


 To be continued.

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Zlob Mini Mixer

April 11, 2018, 4:39 am
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You can never have too many mixers.
(Esp when they are only 2HP wide.)

I'm building a performance Euro case and these will come in very handy.
Zlob stuff is awesome and so cheap esp if you do it yourself.


Ive build two already. Two more to go.
These aren't build notes. The official Zlob site with BOM is here:
https://zlobmodular.com/minimix-2/

20K SMD trimmers


oP Amps NE5532










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Tower of David - The Jerusalem Citadel - Israel

January 26, 2018, 3:35 am
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Some pics of the Citadel. This is just inside the Jaffa Gate.

The citadel dates back over 2000 years.
The name "Tower of David" was coined by Byzantine Christians who believed the site to be the palace of King David.



 A view of the Imperial hotel where I stayed from the Citadel.


 Part of the walls & moat of the citadel.

A view of the Church of the Holy Sepulchre.




For more travel links click here:
http://djjondent.blogspot.com.au/2015/03/travel-postcards-index-my-travel.html
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Zlob Dual VCA

April 17, 2018, 3:25 am
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As the old saying goes..
You can never have enough VCAs
Esp when they are only 2HP wide !!!!

These are some pics of my building of the Zlob Dual VCA
 These are not build notes. Just pics to help me remember should i want to build another one.
The official build notes are here:
https://zlobmodular.com/dual-vca/

There are no hard to find parts.
 The important thing to remember is to keep the height of all components as low as possible.
They need to fit behind a 2HP panel.
 So i bent these trimpots back.
The ICs need to be soldered directly to the PCB to keep their height down.
i ALSO bent the caps down and isolated them with shrink wrap


 Everything fits... beautiful.!!!

These trimpots need to be calibrated to close the VCAs... to prevent audio bleed. I did this by ear.
Works great.
I'll probably build some more.
:-)
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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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Pachinko - Hiroshima

April 29, 2018, 2:39 am
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Some pics of a Pachinko parlour. This one is in Hiroshima near the main train station.
A really loud place. It reminds me of the poker machine parlours you will see in Australia.
Though i understand that gambling for money is illegal in Japan.

The Pachinko uses 1 mm diameter steel balls, which are rented to the player by the owner . In comparison a western pinball game use a larger single ball.
So its a bit like a vertical pinball game.
The pachinko player loads one or more balls into the machine, then presses and releases a spring-loaded handle... just like a western pinball.

The Pachinko playing field, is populated by a large number of brass pins, &several small cups (catcher) into which the player hopes the ball will fall. A ball which enters a catcher will trigger a payout (more balls). These balls are dropped into a tray at the front of the machine. They are the reward (not money).

The balls can't be removed from the parlour, but can be exchanged for tokens, or prizes.


A post shared by jono (@dj_jondent) on

For more travel postcards click here:
http://djjondent.blogspot.com.au/2015/03/travel-postcards-index-my-travel.html

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Sonic Potions - Penrose Quantizer

April 29, 2018, 4:24 am
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I purchased this as a kit a few years ago and only recently built one.
Here are some pics.
The official build notes are here:
https://www.sonic-potions.com/penrose

Its a fairly easy build.
Trickiest part was getting the buttons to line up perfectly straight.

 Each pack comes with some camel balls and some jewelry
The Jewelry is in the shape of a bottle of potion.













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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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Buffered multiples - BMC Eurobuffer

April 30, 2018, 1:52 am
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Just built a Barton Musical Circuits Eurobuffer. BMC037. It's a buffered multiple.
Very easy build. Uses a TL047
Build notes and schematics are here:
http://www.bartonmusicalcircuits.com/eurobuffer/





Got me thinking about how they work just in case I wanted to go totally DIY.
MFOS - Music from Outerspace use TL084s instead of TL074s
 http://musicfromouterspace.com/index.php?MAINTAB=SYNTHDIY&PROJARG=OLDIESBUTGOODIES/VOLTAGEMIXER/voltagedist1.html

They call their multiple a "Control Voltage Distributor".
The pinout for the TL084 & TL072 are identical

Probably any low offset, high speed opamp will work ....
such as the TL062, TL064, TL072, TL074, TL082, TL084 series

Links
+ BMC website (lots of great stuff here)
+ Muffs

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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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Triple Sloth - NLC Build notes

May 1, 2018, 6:49 pm
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