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Some of my build notes re the fader bank.
This is a eurorack compatible module, however it does use midi and i2c so I hope it is compatible with other synths.

The official website is here:
https://16n-faderbank.github.io/

You can make your own PCBs and panels for it.
Github
https://github.com/16n-faderbank/16n/tree/master/electronics

The module uses a teensy microcontroller

The official build notes are here:
https://github.com/16n-faderbank/16n/tree/master/build



cd 4067
This is a cmos 16 channel multiplexer


MCP6004
This is a quad op-amp

diodes: D1 to D4 are four SOD-123 diodes.

 R17 and R18 are 4.7k resistors.
+ If you plan on using I2C with an ER-301,
   Ansible or TXo, (ie I2C "MASTER" mode) you should populate the 4.7K resistors.
+ If you plan on using I2C with a monome Teletype,
   do not populate these resistors - it may well cause problems.

........................ I'll leave these off for the moment... see how it goes


 the stereo jack sockets for MIDI and I2C.


the 16 mono jacks. 





tHE Teensy 3.2


to be continued ... waiting for some parts
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These are some un-official build notes for the Non-linear Circuits Shat-noir Phaser
It's an eurorack module.

This module uses light dependent resistors (LDRs).
You can find other phasers using a similar idea: notably the Carlin, Compact Phasing A,
Morely Phaser and ADA final Phase.

You will need to build a light-proof box to house the LDRs and the central LED.

Shat noir Phaser - YouTube

Links:
+ NLC Blog
+ BOM
+ Wiki
To be continued................
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.................
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If you are familar with modular synthesizers, you will probably be aware of logic gates.
But did you know of their connection to the Apollo mission to the moon?
It's nearly 50 years since those heady days.
Apollo changed our lives in so many ways & the technology used then, permeates our society to this day.

Above is a pic of the AGC - The Apollo guidance computer.
 (The original uploader was Grabert at German Wikipedia. [Public domain])
 
This was the computer that took those 3 men to the moon and back. In addition, it was one of the first computers to use integrated circuits (ICs). The AGC was in fact the world's first "embedded system".

Today ICs are everywhere. But back in the late 1960's they were a revolution 
NASA's goal was to use components that were low weight, had low volume & operated on low power. Coupled with this, they had to be extremely reliable.
With these goals in mind they decided to use a single simple integrated circuit for all logic functions.


Since just one chip was used, NASA could really test it under whatever extreme conditions it liked.... to make sure that it could survive everything which space travel could throw at it.
AGC dual 3-input NOR gate

 This single chip contained a three input NOR Gate. It's incredible to think that it's possible to carry out all logic functions to take men to the moon with just a NOR gate. 
  This gate gives a positive output only when both inputs are negative.


The beauty of the NOR gate, is that it is what is known as a universal gate.
In other words, it can be combined with itself to make any other  kind of logic gate

For example a NOT gate can be made by joining the inputs of the NOR gate.
 
The OR gate can be made by inverting the output of a NOR gate.

 The AND gate is made by inverting the inputs of a NOR gate.

 We can go on and on, but I think you get the idea.
The AGC dual 3-input NOR gate schematic

 NASA used about 5,600 in total for the later AGC versions.

Links.
+ Schematics of the AGC
+ Ljunggren Audio
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New Sound Waves are hosting a night of Modular Electronic Music this coming Wednesday.


Location: The Hideaway Bar.
                 156 Enmore Road, Enmore (Sydney)
Starts at 7.00 pm

Facebook link:
https://www.facebook.com/events/2349710731937070/
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'''
The Serge TWS and WM are classic waveshaping modules.

Wave shaping is one of the fundamental parts of oscillator designs as well as being one way to achieve distortion and design new waveforms from existing waveforms. When building a oscillator core, often waveshapers are used to derive additional waveforms from a single saw or triangle core.
+ Oscillator cores & Exponential Converters

The timbre circuit from the Buchla 259 is another example of the early use of waveshapers.

I understand that Don's Harmonic Oscillator from the Buchla 100 series used waveshapers to add harmonics to the core oscillator. 
 There are lots of modern manufacturers of waveshaping modules in many formats.
To be continued ............
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If you have a chance to visit Canberra over the next few weeks, don't miss the Monet exhibition
https://nga.gov.au/impressionsunrise/

In addition to seeing this master of impressionism, there are also lots of Turners and the odd Whistler.
Well worth it.

Monet's "Sunrise" is there.
This is the painting that is credited with inspiring the name of the Impressionist movement

I've only ever seen this in text books. I don't think it leaves France very often.

There are lots of his water lilies paintings


and the Japanese bridge from his garden in Giverney



For me, the highlight were the Turners.
I love that guy !






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