Showing posts with label Eurorack. Show all posts
Showing posts with label Eurorack. Show all posts

Tuesday, 16 October 2018

LZX - Cadet III - Video input

As the name says this Eurorack module allows you to get external video into the synth.
It amplifies the input signal.
It is best used for monochromatic input cameras or devices with Genlock capability.
I understand that you will however need the Cadet I to get a steady video signal even though
the Cadet III doesn't use the 14 pin sync header.

The Cadet III has brightness and contrast knobs. It converts the input video into a black and white "Luma" signal.
These aren't official build notes, just my records to help me trouble shoot.
It's a work in progress.
Do let me know if you spot any errors or omissions.



u9 - TL431BQLPR
I'm trying this instead.

"2N3904 and 2N3906 is OK. These are generic NPN/PNP parts." (CreatorLars).

Installed the LM1881N/NOPB. Its a video sync separator. It extracts timing information from
from standard negative going sync NTSC, PAL and SECAM video signals

The composite video signal enters on pin 2.
You would get a vertical sync and a horizontal sync signal out of pins 3 & 1 but these don't appear to be connected in the schematics. (I think these sync signals could be used to make ramps if you wish to do some vector rescanning)


installed the CD-4053. CMOS

 Re the 2x8 pin power header.
I've built just 2 x 5 pin headers since the schematics indicate pins 15,13,& 11 (for Gate, CV & +5v) arent connected. (Though I may will change this in the future if I find they are)



ICs used in this build:
CD4053BE - its a 3 channel multiplexer
LM6172IN/NOPB - op amplifier
LM1881N/NOPB - video sync separator.
TL431BQLPR - voltage shunt regulator
TL072IP - op amp
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Links:
LZX official
Muffs - Cadet series DIY/assembled

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Click here to access the Video Index page

LZX Cadet II - RGB Encoder

Some build pics of the Cadet RGB encoder.
The RGB encoder - handles the output coding.
It takes 3 color inputs from Cadet system and converts them into a composite output.

It's based around this module from the visionary system.
It's how the video exits the system. ... so I'd usually put it at the end of the chain.
It does need the sync cable.

These aren't official build notes, just my records to help me trouble shoot.
It's a work in progress.
Do let me know if you spot any errors or omissions.

 The PCBs come with one surface mount IC pre-assembled (AD724.)




C17 & C28 - they are labeled on the BOM as DPN. >....?????
Might leave these unpopulated for now.

C20 & C21 are 10uF Tantie caps

 Mouser : 581-TAP106K025SCS

They are polarized. The long lead is positive.


I'm missing the
595-TL431BQLPR ............there is a 26 week wait from mouser at time of writing.
It's a shunt regulator . Marked on the PCB as U11.

I'm trying the 595-TL431BQLP  instead.
I think the pin out is identical.

"TL431 variants, check the datasheet to make sure the pinout is the same as the one specified. Some of the variations have different pinouts. If pinout matches it should be okay. LM4040 is another substitute. These are all 2.5V precision voltage reference parts." (CreatorLars)

also (IN RELATION TO LATER MODULES)
"2N3904 and 2N3906 is OK. These are generic NPN/PNP parts." (CreatorLars).


ICs used in this build:
SN74HC14N
AD724JRZ
CD4053BE
TL431BQLPR
LM6172IN/NOPB
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Links:
LZX - official 
LZX - help - component substitutions

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Click here to access the Video Index page

Wednesday, 10 October 2018

New Sound Waves - Meeting 2

This was held on Sat Oct 6th Oct.
Lots of fun !!!


sOME LZX cyclops lazer action




A post shared by jono (@dj_jondent) on

Come to the next meeting.



A post shared by jono (@dj_jondent) on

Tuesday, 9 October 2018

Voltage Processor - CVP - Build

Though not the sexiest module in your modular rack, the voltage processor is very useful and in fact essential to get the most out of your system.

I've got a quite a few in the Buchla format.
These are great pages concerning the Buchla CVPs
++http://buchlatech.blogspot.com/2008/10/musings-on-voltage-processors.html
++ Muffs = 257r build

Serge also have many voltage processors. These links should get you started
++http://www.serge-fans.com/m-class-cv-processor.cfm
++Random source
++http://djjondent.blogspot.com/2015/11/voltage-processor-cgs-81-build-notes.html
++Elby ES14
++ Serge.net -R1 The paperface dual voltage processor

Today I'm building a Euro CVP From Manhattan Analog
The build notes are here


Pretty easy build. the components are marked on the PCB.
The trimpot is 20k

The two ICs are basic Op-amps ... a TL074 & 072


There are two 50k and a 1M pots , The 50k are Linear.
I've seen builds of this with the 1M being either audio or linear (P3/Glide is the 1M.)
I'm building this with 1M linear.
I'll build another one with a audio pot and see how it behaves.









The anode of the LED goes into the square hole.

to be continued......

 

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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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Saturday, 29 September 2018

Video Stuff - Index

My video pages are scattered throughout this blog and can be difficult to sort out at times.
Thus this index.


3TrinsRGB+1 - Video Synth by Gijs Gieskes
(This wonderful synth is mostly DIY)
+ Banana break out box 
+ 3trins to LZX 
+ 3trins with FetidEye's Comparator
+ Triple 3Trins Haliburton case - building the enclosure
+ 3trins patches 1
+ 3Trins - build pics & initial tests


3-Trins Plugins
+ 2xSPDT & 4xSPST
+ SPST & SPDT
+ 2xVideo in Negative
+ Video in Lines

Critter & Guitari
+ Cellular Automatia

Cat Full Of Ghosts

Korg



Live Performance
+ NewSoundWaves - 21st March 2015 -Roland V8 mixer, P10 clip launcher, ex security camera, Video Synthesizer and modules: LZX, MVIP and Geiskes 3TrinRGB+1c

LZX
+ Basic LZX patches
+ Sat arvo Jam - 10th Jan, 2017 (Vidiot)
+ The Putney and LZX Visual Cortex
+ Function Generator- build pics
+ Cyclops - Lazer Interface
+ Visual Cortex - Composite vs Component inputs

LZX - Cadet
 + Cadet I - Video Sync Generator - Build notes
 + Cadet II - RGB Encoder - Build notes
 + Cadet III - Video input - build notes
 + Cadet IV - Dual Ramp generator - build notes
 + Cadet V - Scaler - build notes
 + Cadet VI - Fader - Build notes
 + Cadet VII - Processor -Build notes
 + Cadet VIII - Hard Key Generator - build notes
 + Cadet IX - VCO - build notes
 + Cadet X - Multiplier - Build notes

LZX - Castle
Introduction
00_000 ADC - Analog to digital converter
01_001 DAC - Digital to Analog converter
02_010 Clock VCO
03_011 Shift Register
04_100 Multi Gate
05_101 Quad Gate
06_110 Counter
07_111 Flip flops

Monitors
+ Looking for the prefect monitor/scope for Rutt-Etra
+ Tektronix 620 monitor
+ Tek 620 - first attempt at Vector Rescanning / Rutt-Etra

Scanimate 
+ Matrix switch panels

Youtube Channels
YouTube 1 - main channel
YouTube 2 - experimental
YouTube 3 - test videos

Vectrex
+ Initial explorations - just playing Minestorm
+ Vectrex - Hack
+ "Curling" effects - vector rescanning attempt 1

Vidiffektor - build notes

Wednesday, 5 September 2018

NLC - CellF Voice - Build notes

I've had this PCB/panel for 4 years... finally getting around to building this.

I finished the companion to this about a year ago, the CellF action.

These two panels were developed for the cellF neural synth project where a synthesizer was made to be controlled by live human neuron cells.


Some pics of the virgin PCBs

The CellF action build uses smd resistors, caps & ICs.
All transistors are thru-hole. 
 

The PCB is very large 


Each board has. 
2 tri-core VCOs 
2 LFOs 
2 LPGs 
3 VCAs 
VC spring reverb 
diff-rectifier 
jerkoff chaos 
2 281 EGs 
Sauce of Unce. 
Pots and sockets mount on PCB, no wiring (except to reverb tank). 


I'm building version 2.0  

 I usually put on the ICs first, as these are the most fiddly.

Regarding the NJM13700 .

I'm using   regular LM13700 SOIC . they will fit (in addition to some NJM13700s)
These are transconductance amplifiers.


I'm using 470 ohm resistors for the LED resistors (RL)



There are 2 CMOS chips used in the build: 4001 & 4066

Using these 10V zeiners

The 10V voltage regulator: 7810

JFETS: using J112 x 4

Vactrols:
Using 2 types:

The single vactrol NSL. the white dot marks the cathode.

VTL 5c3/2..... I used them a lot in the buchla "clones"
The sloped edge marks the cathode. The cathode is labeled on the PCB with a K.


The Dual LED has a common Cathode. Its orientation doesn't matter.
Check the led fits in the panel hole before putting it all together. I had a batch of duals that were a bit big and the needed 0.5mm drilled out.


almost there.
Final tests.

Notes:
+ NLC blog
+ Build notes - official version 1.3
+ Voice - prototype working 


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You can find more NLC builds here.
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