Wednesday, 16 November 2022

Valmorification - NLC - build notes

These are some build notes for the Nonlinear Circuits Valmorification module.
 

It's eurorack format.
Just 4 HP
Its a envelope generator.
Think Serge Slope Generator, Korg PS3100 EG, Maths,
 Rampage and a dozen other Eurorack modules.

This module must be the simpliest envelope generator you can build.

So a really useful module to have.
If nothing is patched, it self cycles.
range is quite wide ...... minutes to audio rates.
So you can use it as a sound source or a really slowwww LFO.

Patching into the ↑CV or ↓CV jacks causes the associated pots to become
attenuators for the signals you have patched in.
 
 

Links:
+ BOM

Looks like the parts are easy to find... all pretty common.


Schottky

Get that IC on



headers to connect the two PCBs

The Boxer's Omen
The Boxer's Omen (魔, Mó, Magic) is a 1983 Hong Kong horror film directed by Kuei Chih-Hung



All pots are 100K linear taper










I'm using a blue 3mm LED only because its my fav colour (and I have plenty of them as they are useless with DIY vactrols)







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You can find more NLC builds here.
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Tuesday, 15 November 2022

A'en Darah - Ain Dara - Syria

 Ain Dara, Afrin.


This site is in northern Syria. Administratively, its part of the Afrin District .
It's just north west of Aleppo.
I took a shared Taxi from my hotel.


Ain Dara is a Syro-Hittite temple noted for its similarities to Solomon's Temple (1000 - 900BC) in Jerusalem, which was described in the Hebrew Bible.


Ain Dara dates to around 1300BC to 740BC which puts it in the later part of the bronze age.


The site was discovered in 1955 . The site is on the summit of a small hill. As you walk to the top, you can see the layers of history....3000 years !

The Lion of Afrin

The massive basalt lion was one of the first things discovered in 1955
It's 3.3m tall. Its role was to guard the gateway to this special place.


Sadly, this lion is now gone.... probably smuggled across into Turkey.
Apparently, it was looted by a Turkism backed militia. (Al-Hamzat ) in Dec 2019.

"On December 20th [2019], the Turkish army and its mercenaries attacked Afrin with tanks, 
artillery and jets causing massive  destruction of the city....Recent footage of a military exercise by a pro-Turkish militia (National Liberation Front) who established a  shooting range against the archaeological hill of Ain Dara in the occupied Afrin province invaded and controlled by Turkish forces and their proxy militias last year, revealed the tragic disappearance of the famous historical masterpiece known as The Lion of Afrin. 

Ain Dara itself was targeted by Turkish jets in 2018 as Turkish units and their proxy forces advanced on the area known for its archaeological wealth that featured one of the world's oldest temples often compared in significance to the Temple of Solomon... The disappearance of the Lion of Afrin marks another war crime against Syrian history and humanity at large."



Note that the decorative works are on just one side .
The other side was probably connected to a wall, or column, so was left plain.

Massive footprints were carved into the floor; whether of giants, humans or animals is debatable.


Notice, that there are actually 3 footprints at the entrance to the building.
One pair of footprints can be found on the floor of the portico, followed by a single footprint.


There is also another single footprint at the threshold of the main hall. 


The distance between the two single footprints is about 30 feet.
The implication being that a stride of 30 feet would belong to a giant (or ‘god’) about 65 feet tall.

Who was this temple dedicated to ???
 Ain Dara may have been devoted to Ishtar, goddess of fertility,
or to the related female goddess Astarte.


The temple is rectangular in plan, about 65 feet wide by 98 feet long. 
Built on a large raised platform, the temple consists essentially of three rooms: 
a porch; an antechamber and a main hall


I understand that the pic above is of the God Hatnor (Hat'ter in Egypt)
The building was once covered with rows of basalt reliefs of sphinxes, lions,
 mountain gods and large clawed creatures whose feet alone remain.





...





Update:

According to the Assad government, In late January 2018, the temple was significantly damaged by 
Turkish Air Force jets in the course of their Afrin offensive.

Reports indicate that at least 60% percent of the structure was reduced to rubble.
From some photos and video released online, it seems that the entire front facade of the temple has been destroyed. 


For more travel postcards click here:

* Syria
   -  Aleppo 
   -  The Baron Hotel - Aleppo Syria
   -  Palmyra (the Roman City)
   -  Ugarit - Ancient ruins.
   -  National Museum of Damascus & army museum
   -  Tartus - Syria - seaside city 
   -  A'en Darah - Ain Dara - Syria - Lion of Afrin

Monday, 14 November 2022

Bi-Di Choppers - build notes - NLC - part 1

These are my build notes for the Bi-Di chopper.
 

This is a dual stripped down version of the original Chopper. 
It is a very easy build with few components.
It's a analog switch, with a difference.
The signals being switched also control the switching, 
so things happen that you might not expect.

 It can be used to process CV and audio signals.

The basic idea for the Chopper is from a 1975 paper titled – ‘A nonlinear modulator using delta principles’
 by S.K. Mullick and K.R Srivathsan, although this version drops the comparator output, makes the slew stage adjustable, converts 
the 2 inputs so they can also be outputs and adds an in/out stage before the slew section.




Links
+ BOM


 Andrew's got some similar modules:

Chopper Bi-di (silver Panel).

NLC words of wisdom

Resistors & caps first

RL Leds - using 4.7K
 


DG213 - on order from mouser
















to be continued ...
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You can find more NLC builds here.
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Tuesday, 8 November 2022

elk elektronics sat 19th Nov

 These Elk Synth Sessions are a great opportunity to meet with other synth enthusiasts, 

hear performances, tech talks and check out different and unique gear.


SATURDAY, NOVEMBER 19, 2022 AT 2 PM – 6 PM
Synth Sessions 2022
Elk Elektronik

Check FB for more details
https://fb.me/e/2kuFMFtsi

New Atlantis - upcoming gig

 SATURDAY, NOVEMBER 19, 2022 AT 3 PM – 11:30 PM
New Atlantis
Esme Timbery Creative Practice Lab


Check facebook for details

Guest artists include Deepchild (Fathersong full album), Panos (ambisonic set), Icevena, New Sound Waves artists, Strakt, Mark P, Benjamin Carey, Alex White, 80T and a full program of works curated by Vitalise Sydney.


Wednesday, 2 November 2022

Clump - build notes 2 - NLC - COMPLETION

 This is part 2 of my build notes for the NLC clump module.
Its a matrix mixer.

Links
Wiki
BOM


Part 1 is here:
  • Headers.
  •  
  • These connect the two PCBs
  • I'll used S1JL voltage rectifiers in the beginning but swapped to slottky diodes\


  • The front panel. needs four on-off-on toggle switches
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  •  
  • also 16 x B100K (linear) pots

  •  24 sockets
  •  

  • ....

  •  final calibration time.
  • You need to adjust these 16 blue trimmers


  • If you look carefully, you will see labels such as 1a , 1b 1c..... 2 a, 2b .....3a, 4a etc etc
  • Each trimmer sets its own VCA
  •  I used a simple Elby scope : ED 701

  • ...
    Andrews calibration  instructions are perfect.

    start with the top left pot (called 1a) 
  •      The columns are numbered 1234 and the rows are to be
    known as a, b, c & d. 
  •      So looking at the panel; 1a is the top left
    corner pot and 4d is the bottom right corner pot.
    Turn all pots to zero except 1a. 
  •     Turn 1a to maximum. Measure the
    voltage on output a (the top most output) with a multimeter set to
    DCV or an oscilloscope.
    Locate the VCA labelled 1a on the PCB and tweak the 1k trimpot until
    the output measures 0V.
    Turn 1a pot to zero, turn 2a pot to max, find VCA 2a on PCB, tweak
    trimpot until output measures 0V..
etc etc

  •  

     

  • Repeat until you have adjusted all the pots.
  • That should be it. you are good to go.

 
 ..

Project Gallery - Luminous 2022

 Luminos 2022


Project Art Space


..Ed .. Elk Elektroniks

Art and electronic music are a great combo.








I think these openings will be held monthly.
255 Keira St, Wollongong NSW 2500

http://www.projectgallery.com.au/