Wednesday, 18 March 2020

NLC Shat Noir - build - part 2

This is part 2 of my Shat Noir build.
It's a Eurorack format module.
Part 1 is here:
https://djjondent.blogspot.com/2019/07/shat-noir-phaser-build-notes.html

Sorry for the delays in finishing the module.


The trimpots




Start building the vactrol box

uSING  strip headers





with LEDs, usually this holds:
The square pad represents POSITIVE
The round pad represents NEGATIVE
Anode - positive, long lead
Cathode - flat side, short lead



 The light dependent resistors











Tayda: A 1851 --- linear B 100K



Calibration:

The CV drive is an anti-log circuit, it works a little differently as
both the CV and phase pots must be adjusted to find the sweet spots. 

If one of these pots is at zero, the other will not have any effect.
The In2 pot is 0 at centre, the incoming signal is inverted below that.
it is intended as a feedback input for one of the stage outputs, but
shove in whatever you want of course.



There are 2 trimpots .. feedback & range



"The 1M feedback trimpot pot should be set so the circuit just starts to scream when the panel pot is at max. This can vary a lot depending upon the signal source and its frequency.
Best to leave it in the middle to start and adjust if your module is too squeaky.
The 1M range trimpot sets the operating range for the CV and Phase panel
pots. Again leave it in the middle to start and adjust if you find the
panel pot operating range is t
oo narrow or wide. You may need to adjust
the 470k* resistor sitting next to the trimpot as well. Generally it is
happy about in the middle".




Links:
+ NLC Blog
+ BOM
+ Wiki

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Saturday, 14 March 2020

Happy Pi day

Happy Pi day

3.142  ...

Pi is approximately equal to 3.14159.
Take this opportunity to download Sonic Pi.
http://sonic-pi.net/

It's free.
It's a great way to learn programming that is linked to electronic music

An example - Daft Punk

Tutorials:
http://sonic-pi.net/tutorial.html

Thanks Sam Aaron


Thursday, 12 March 2020

Wednesday, 11 March 2020

Willem Twee Studios - The Netherlands

This looks like a great studio.
Well worth a booking if you're in Holland.

Official website
https://www.willem-twee.nl/studios/

Facebook
https://www.facebook.com/willemtweestudios/?pageid=120494768636017&ftentidentifier=393452684673556&padding=0

There are 2 studios


Studio 2 has the Arp 2500s etc

Studio 1 has lots of test equipment


I'm particularly interested in the old analog computer


Melodic rhythms

Friday, 6 March 2020

Lyra Build - part 3

Part 3 of the Lyra 8 Build

Part 1  of the Lyra build is here
Part 2  of the Lyra build is here
Part 4: Making the Lyra Panel face plate


Building the lyra is very different from what I'm used to.

It's a bit like soldering an SMD board with through hole parts.
The pots and switches  are wired to pads, .... not into holes in the PCB as you would usually see if you were building a Eurorack module.

The separation of the synth into a control pcb & the main PCB should make trouble shooting easier. I first started connecting the pots to the PCB with left over resistor wire, but in hindsight, insulated wire would be better. ... less chance of shorts.



Lots of cleaning up to do post soldering.
This is the keyboard.


Closeup of the rear of the keyboard section.


Connecting the upper and lower boards.

I'm using insulated ribbon cable and making my own headers.

Make nine 12 pin ribbon cables.
and one 5 pin cable (for the in-out board.

 Lot's and lots of wire stripping. :-)

There are 3 boards to connect ... don't forget the in - out board.

This connects in two spots . One to the main  board, and another to the control / pot board.




tHE shields



tIME TO plug everything in



tHE in/out board connects to your DC power source






tHE case is a bit rough ... just some recycled timber.

will need to tidy up after its fully tested.



Part 1  of the Lyra build is here
Part 2  of the Lyra build is here
Part 4: Making the Lyra Panel face plate

Thursday, 5 March 2020

Han Van Pass - Vietnam

Hai Van Pass is about 20km long. The mountain pass is part of the National Route 1A in Vietnam. 
It's part of a mountain range (Annamite Range) that juts into the East Sea of Vietnam
It was made famous by the guys at top gear.


They did one of their hilarious episodes in Vietnam.

The road joins the city of Da Nang and Lang Co in Hue Province.     WE traversed the road by bus. travelling from Hue    
The road itself is ancient ...dating back to the 14th century. Back then it was the boundary between the Champa and Dai Viet Kingdoms. 

You can still see the grand gate at the summit of the pass. This was the border crossing between the two kingdoms. 


There are lots of  hairpin bends on the road.
But the dangers are compensated for by spectacular views.
You'll see steep mountains, plunging into the ocean, deserted sandy beaches and lots of untouched forest.


The name Hai Van translates as a ‘Sea of Clouds’ in Vietnamese


This spot, is roughly half way from the top to bottom of Vietnam on a map.
It marks the junction between the colder North & the warm tropical south.


During the Vietnamese-American War, this pass connected the war-ravaged cities of Hue and Da Nang. It must have been a very sad spot. The gate is riddled with bullet holes.
Today, most of the traffic uses the Hai Van Tunnel... bypassing this road.
So its relatively peaceful and quiet (by Vietnamese standards).

The Hai Van Tunnel was built in 2005. It is the longest tunnel in Southeast Asia.

From the summit you see the city of Da Nang in the distance.
We stopped there for some pork buns & baguettes.



For more travel postcards click here: