Tuesday, 26 December 2017

Christmas fun with the Roland 100m

Getting familar with the basic D-set

A simple patch using just 5 modules: 112 Dual VCO, 121 Dual filter, 130 Dual VCA, 140 Dual envelope, 150 Ringmod, SH, Noise. The 1st VCO supplies the bass & second VCO, the drums.
The full unedited video is here:
https://www.youtube.com/watch?v=y_QU--2VCrc&t=19s

Wednesday, 13 December 2017

CES Digital Systems trainer - Ed-Lab 702

This is a educational tool to teach students digital logic and give basic microprocessor experience.
I'm hoping it will teach me a thing or two.

I believe there was a suitcase version. This is a console configuration.
The manufacturers website can be found here:
http://cesindustries.com/ces702.htm



There are manuals that accompanied this console. Sadly I don't possess them.

Some closeups:













Tuesday, 5 December 2017

Buchla 200e explores space

Have you ever wondered about the origin of the names of some of Don Buchla instruments?
Esp the later 200e series. Skylab, LEM, Aquarius, Spider, Snoopy ????
I must thank my friend Justin for enlightening me.
They are all references to NASA space exploration vehicles.

Skylab
Skylab was the United States' first space station, orbiting Earth from 1973 to 1979.
 The Buchla Skylab. It's a 10U size system designed to be portable.
LEM
The Apollo Lunar Module (LM), originally designated the Lunar Excursion Module (LEM), was the lander portion of the Apollo spacecraft built for the US Apollo program




 An amazing piece of engineering to say the least.

Named the LEM 208, it's a BEMI easel, minus the 218 keyboard.

Aquarius
"Houston we have a problem"

The Apollo 13 mission almost ended in disaster. An explosion on board forced the crew to circle the moon without landing. Oxygen tank No. 2 blew up, causing the No. 1 tank to also fail. 
The command module's normal supply of electricity, light and water was lost, and they were about 200,000 miles from Earth.  Apollo 13 "Aquarius" was used as a lifeboat. It burned up in Earth's atmosphere April 17, 1970 but saved the lives of all crew. An incredible achievement.


Below is the Buchla LEM7 Aquarius, with a 218 keyboard.
Its a great interface module ... esp for eurorack systems, providing MIDI, usb, CVs, gates etc.
The Aquarius LEM Includes:
a 3 module powered boat
225h Midi to CV converter
202u multiples & utilities module
4 half module blanks

Spider
Apollo 9 was the third manned mission in the United States Apollo space program and the first flight of the Command/Service Module (CSM) with the Lunar Module (LM, pronounced "lem"). It launched on 3rd March 1969. It was a luna module test flight. This was the first space docking of two vehicles with a crew transfer between them. The CSM was named "Gumdrop" and the LEM was named "Spider".


The Buchla LEM Spider.
The Spider LEM includes:
3 module powered boat
225h MIDI-CV interface
226h CV-MIDI interface
252e Polyphonic Rhythm Generator


 Snoopy
Apollo 10 was the fourth manned mission in the United States Apollo space program, and the second (after Apollo 8) to orbit the Moon. Launched on May 18, 1969, it was the F mission: a "dress rehearsal" for the first Moon landing, testing all of the components and procedures, just short of actually landing.
As you have probably worked out my now, Snoopy was the name given to the LEM.

The Buchla LEM Snoopy
Snoopy consists of :
3 module powered boat 
226h (CV to Midi converter),
225h Midi and CV interface,
292h Dual Dynamics Manager
281h Dual Function Generator
261e Complex waveform Generator


Tokyo Tower - Japan

Some pics of Tokyo Tower in Japan.

At 332.9 metres (1,092 ft), it is the second-tallest structure in Japan. Built in 1958, Hisakichi Maeda, founder and president of Nippon Denpatō, the tower's owner and operator, originally planned for the tower to be taller than the Empire State Building, which at 381 meters was the highest structure in the world at the time.

Inspired by the Eiffel Tower in Paris, France, it is claimed the tower can withstand earthquakes with twice the intensity of the 1923 Great Kantō earthquake.









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Saturday, 2 December 2017

DIY index

This is the index for all DIY projects.

+ 3 Trins Video synth

+ CMOS & Lunetta synths

+ Eurorack

+ NLC - NonlinearCircuits

+ Power Supplies (PSU) for modular synths
 
+ Serge - CGS - Buchla
+ Shopping for components
+ Synth Lab (SDIY)
+ Synthacon - Steiner-parker

+ TKB - Serge Build notes (Human Comparator)
+ TTL chips
+ TTSH Build notes




Modular On The Lounge

The first MOTL (Modular On The Lounge) .... held at a secret location in Wollongong, NSW, Australia.

All my synth friends were dying for a chance to get together, chat about synths, and get some performance practice.
 So we found a living room and couched it for the night.

 A great turnout.
 
 We set up a projector and a Video Synth.

Justin from Metro Modular showed us some of his new modules.

This modular just arrived back from Japan.


The MM339A Gainriding VCF
I'm especially looking forward to this filter as it's original designer was Dennis Colins who had a hand in designing the ARP 1047 filter (for the ARP system 2500).

MM6031B Marshall LPF Explorer Edition


Hopefully there will be more of these nights in the future.

A post shared by jono (@dj_jondent) on

 #cobramatic

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Thursday, 30 November 2017

CellF Action - Build notes

Finally getting around to this.
Andrew put these out in 2015 (along with the CellF Voice).
Andrew's build notes are here:
http://www.sdiy.org/pinky/data/cellF%20action%20BOM%20&%20build.pdf

A big-ish build I think.

Some closeups of the PCB to help with later troubleshooting.
Right of PCB

Centre PCB

Left PCB

The Action panel uses three NJM13700
https://www.njr.com/semicon/PDF/NJM13600_NJM13700_E.pdf
They are current controlled transconductance amplifiers.
I'm using the same components I used on the cluster build


ICs:
I'm using sizes SOIC-14/16, SOP-16
SOIC = Small Outline IC
SOP = Small Outline Package 

"A Small Outline Integrated Circuit (SOIC) is a surface-mounted integrated circuit (IC) package which occupies an area about 30 to 50 % less than an equivalent dual in-line package (DIP), with a typical thickness that is 70 % less. They are generally available in the same pin-outs as their counterpart DIP ICs. The convention for naming the package is SOIC or SO followed by the number of pins. For example, a 14-pin 4011 would be housed in an SOIC-14 or SO-14 package."
(Wikipedia)
 There are 5 fixes needed to the slew of the logic module.
 

 I added the 47K resistor to the underside of the PCB

gETTING there. Just waiting on some components from Mouser.
This is a big build.
ICs and most of the SMD passives are in.


-----------------------------------------------

Having trouble sourcing the TLP291-4 - quad opto-coupler package. ?? Mouser no
I'm trying these:
https://au.rs-online.com/web/p/optocouplers/6936807/

-------------------------
LED resistors.
I'm using 1.5K resistors for the RL components.
Andrew's build notes for the Cell F Voice panel said:
For regular LEDs use RL = 330Ω-470Ω
forultra/superbrights use RL = 4k7Ω-10kΩ

I may have to change this once I get the board up and running.
Easy enough to do with SMD .


 

Time for the pots and jacks
 Notice the height of the jacks. The switch is taller than usual and this is forcing me to raise the level of the jacks & pots.
 Soldering the pots was a tad tricky. 



You will need 4 of these JFETs


These are the 1K tempcos draped over transistors in QUO and VCO sections

Links:
+ NLC Build notes for Cell F Action panel
+ Build notes for Cell F voice

To be continued.

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