JonDent - Exploring Electronic Music: August 2022

Tuesday 30 August 2022

How Aphex Twin Spurned the 90s Dance Mainstream ("Windowlicker") | New B...

Thursday 25 August 2022

Encephalo Adjuster - NLC - Build notes - part 1

This is a 24 stage phase shifter

It uses LDRs (light dependant resistors)

Links

+ Wiki

+ BOM

The build looks like it can get crazy with a huge number of LDRs ... twenty four.

I understand it has wide sweet spots and is an excellent sounding phaser. Should be fun to build .

Doesn't look like there are any hard to find parts.. apart from the 13700 op-amp which seems to be in short supply from some shops

There are 3 PCBs

The name of the module comes from a mind control device that appears in a few of AE Van Vogt's Sci-Fi novels.

Van Vogt began publishing science fiction with “The Black Destroyer,” the first of four stories which became his novel The Voyage of the Space Beagle.

His other major works include Slan, The Weapon Shops of Isher, and The World of Ā. (Null A) which is of course a NLC module.

+ NULL-A - mini synth - 2VCOs, 2 filters, etc - Build notes

Wikipedia link

The Voyage of the space beagle was first published in 1950, though most of this book was written much earlier and published separately:
- Chapters 1-6 appeared as "Black Destroyer" in the July 1939 edition of Astounding Science Fiction;
- Chapters 13-21 appeared as "Discord in Scarlet" in the December 1939 edition of Astounding Science Fiction;
- Chapters 22-28 appeared as "M33 in Andromeda" in the August 1943 edition of Astounding Science-Fiction.

There are eight TL074s and one LM 13700

+ Integrated circuits - packaging

Get the ICs on first.

Rest of the caps, resistors.

Trimmer - 100k

Trannies - BC587 & 547

schottky diodes

to be continued....,.

Encephalo Adjuster - NLC - Build notes - part 2 (Completion)

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You can find more NLC builds here.

http://djjondent.blogspot.com.au/2015/03/non-linear-circuits-ncl-index.html

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Elk Elektroniks workshop this Sat - 27th Aug

Elk Elektroniks are holding a workshop this sat.

The Neutral Labs Scrat Steiner-Parker filter.

This is a eurorack DIY kit.

" You can change the resonance flavour by plugging in components like diodes, capacitors or resistors (even LEDs and/or light-dependent resistors) directly to the front panel. A set of preset cartridges is also available, which gives you instant access to a variety of filter sounds. You could even make your own. Or go all in and connect some jumper wires to a breadboard for pretty much endless possibilities."

https://www.elkelektronik.com.au/

https://www.facebook.com/elkelektronik/

Thursday 18 August 2022

Poultry in Motion - build part 3

Part 3 of the build for Poulty in Motion

This module can be viewed as a VC delay on the top

and a clock divider on the bottom with sync out.

The Clock Jack is an input.

The sync out is fed to a divider to get 12 stages of sync signal.

The sync signal source is a Pt2333 delay IC.

Another way to use this module is as a VCO with divided outputs.

Its not calibrated to 1V/oct , but you can still use the clock input to control the pitch.

In egg timer mode the crystal will generate a second

count (0.125Hz, 0.25Hz, 0.5Hz, 1Hz, etc). This is for getting your

system to work with BPM type drum machines or just to have a regular

count or whatever you think might be fun.

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Part 1 of the build is here:

Poultry in Motion - nlc build notes part 1

Part 2 is here

poultry in motion - part 2 - build notes

Links:

+ wiki

+ BOM

RL Leds

The RL next to the vactrol determines the brightness of the LED in

the vactrol. If using a shop one, just shove in 1k. If using a DIY

with a bright LED, then 2k2-4k7 should suffice.

I'm using 2.7k resistors on all the RLs.

My vactrol will be diy

+ Vactrols - Optocoupliers

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32.768kHz crystal

Purchased on tayda

+ Crystal Oscillators

+ Vactrols - Optocoupliers

Andrew mentioned the oscillator vibrating.

" The crystal is a bit delicate, best to fold it down flat on the

PCB once installed so it doesn’t get bumped around. On the 3rd prototype the module put out a high pitched whine, not from the outputs,

it was the module itself. This turned out to be the crystal

vibrating; it is easily fixed by moving it a little, press it down

harder against the PCB. Worst case you may need to give it a dab of

hot glue as a cushion. This only happened with one build, so I guess

it is not that common."

I'm testing using some bluetac as a cushion.

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vactrol time

"DIY is fine with GL5506/GL5516, LED

and some heatshrink, otherwise

something like NSL-32 will do."

+ Vactrols - Optocoupliers

using a Gl5516 & orange LED

The GL5516 are cheap ... bought a pack of 100 on ebay

Shrink wrap the two.

headers

Jacks & Pots

The pots are B100k

LEDs and the toggle switch

Its done

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You can find more NLC builds here.

http://djjondent.blogspot.com.au/2015/03/non-linear-circuits-ncl-index.html

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Poultry in Motion - nlc build notes part 1

poultry in motion - part 2 - build notes

Fez 4 - morocco - University karaouiyine of fes

Some pics from Fez in Morocco

University karaouiyine of fes

(al-Qarawiyyin)... the oldest university in the world ??

It was founded as a mosque by Fatima al-Fihri in 857–859 and subsequently became one of the leading spiritual and educational centers of the Islamic Golden Age

The Al-Attarine Madrasa (founded in 1323), just north of the Qarawiyyin Mosque

Some sources, such as UNESCO and the Guinness World Records, cite al-Qarawiyyin as the oldest university or oldest continually operating higher learning institution in the world (Wikipedia)