The OP-1 used type B-micro
Wednesday, 24 January 2018
USB connections
Wednesday, 17 January 2018
Modular Eurorack Compressor
Tuesday, 19 December 2017
Master Clock & utilities Eurorack case
Saturday, 2 December 2017
DIY index
This is the index for all DIY projects.
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+ 3 Trins Video synth
+ The Ship of Thesus
+ Adding anchor links in Google blog
ARP 2600 - TTSH
Balanced vs Unbalanced Audio
CMOS
Eurorack
+ Distribution - power bus
Fates
+ Fates - a DIY Norms for Rasberry Pi
Influential ICs
Jasper - Wasp
+ Build notes for the jasper - Part 1
+ Jasper build notes - Part 2
+ Midi interface
Lorre Mill
+ U Tone
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
Microcontrollers
+ Microcontroller Index Page
NLC
+ Full list of (NLC) NonlinearCircuits projects
+ Resistor Arrays
+ Serge - CGS - Buchla
+ Shopping for components
+ Soma - Lyra 8 build
+ Synth Lab (SDIY)
+ Synthacon - Steiner-parker
Python
+ Python for beginners 1
+ Python for Beginners 2
Soma Lab
+ Lyra 8 build - part 1
+ Lyra 8 Part 2
+ Lyra 8 Part 3 is here
+ Making the Lyra Panel face plate
Vidiffektor - build notes
+ Jasper build notes - Part 2
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+List of integrated circuit dimensions
+Surface Mount Nomenclature & Packaging.
+SOT (Small Outline Transistor dimensions)
+Voltage divider, LED resistor calculator
+SMD / SMT resistor code
+Desoldering tips - Belltone
"The man that hath no music in himself,
Nor is not mov'd with concord of sweet sounds,
Is fit for treasons, stratagems, and spoils."
- The Merchant of Venice (V, i, 83-85)
Modular On The Lounge
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
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.
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Having trouble sourcing the TLP291-4 - quad opto-coupler package. ?? Mouser no
https://au.rs-online.com/web/p/optocouplers/6936807/
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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
fINAL pics.
+ NLC Build notes for Cell F Action panel
+ Build notes for Cell F voice
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