Showing posts with label DIY. Show all posts
Showing posts with label DIY. Show all posts

Wednesday, 4 December 2019

102

Some pics of the LA67 102.... Dual Stereo Locator
It's not a Buchla Module.
It follows the same size, format & the circuits used are I understand based on Don's schematics.
I hope one day, Buchla will release an official 102.

I've only seen one real Buchla 102 in the flesh. These are as rare as hen's teeth.
The LA67 version is a pretty easy build, though trying to match the JFETS is tricky.
 (I'm still trying to get it perfect at the time of writing).
I'm not affiliated with the manufacturer in any way. I'm building this to learn how it works
and these notes are just my personal doodles to help trouble shoot any issues I may encounter during the build.

 If you are unfamiliar with JFETS check this link out.
 https://djjondent.blogspot.com/2019/05/transistor-families.html

Metro Modular also make a module inspired by the 102 which is worth exploring if this module interests you. (I would also love to see a Buchla USA version).

 Anyway, back to the LA67 module.




The virgin PCBs, etc.


This module has a 0v & +15 power supply. The original used an additional +24V rail.
The original op-amp was most likely a LM301 (which has a +V rating of +18V)
This module's BOM calls for a TL071.



The BOM calls for J201's
Mouser No 106-J201
My sources tell me that the original used  2N4339 JFETs







tHE Rotary switches are these








Saturday, 23 November 2019

New Sound Waves Modular Meet

There is a NSW Synthesizer modular meeting  coming in 1 week.



To be held at 107 Projects gallery , 107 Redfern St, Redfern.

Sat , Nov 30 .
5.00pm to 8.00pm

+ Facebook link
+ NewSoundWaves

Tuesday, 12 November 2019

Yamaha FM Chips

Some famous Yamaha FM chips. The numbering system is very confusing.
(This is only a small selection of the total produced)
Many of these chips are still available and are excellent for DIY projects.
ALM Busy Circuits Akemie’s eurorack modules are made with some of these old Yamaha chips (YMF262  aka OPL3).

These came out around 1983
     YM21280 (OPS) operator chip (Yamaha DX7& DX5)
     YM21290 (EGS) envelope  (Yamaha DX7 & DX5)
                                  16 voices (6-op) (32 in DX1/DX5)

1983
     YM2151 (OPM, 4Operator Type-M)
      Used in Yamaha SFG-01 and SFG-05 FM Sound Synthesizer units. & Yamaha CX5M.
      Yamaha's first single chip FM synthesis implementation.
       Used in Sega arcade boards from 1985 & Sharps X1 & X68000(1987) home computer
       The YM2151 chip developed into the YM2164 which found its way into the DX21, DX27, DX100

1984
    YM2203 (OPN) Type N
     4 operators per channel, 3 channels. Eight algorithms.
     Used in lots of video games & NEC computers

1984
     YM3526 (OPL)
      Low cost, 9 channel.
      2 operators. Used in the Commodore 64 expansion as wellas several arcade games ..eg Terra Cresta

1985 - DX21, DX27, DX100, FB-01, SFG-05 + Korg DS-8, 707
    YM2164 (OPP, FM Operator Type P)
     4 operators, 8 voices

1985
     YM3812(OPL2)...... famous for its wide use in IBM PC-based sound cards
     such as the AdLib, Sound Blaster and Pro AudioSpectrum (8bit),
     as well as several arcade games by Nichibutsu, Toaplan and others.

1985 ?
    YM3526(OPL).... 2 operator FM synthesis chip.
                                   used in a Commodore 64 expansion, the Sound Expander,
                                   as well as several arcade games, such as Terra Cresta and Bubble Bobble.



1986 --- used in the DX7 markII , TX802
     YM2604 (OPS2)... operator chip
     YM3609 (EGM) ..... envelope chip

1988
   YM2612(OPN2)..... Sega Mega Drive/Genesis & the DAFM synth
   FM/PCM hybrid chip

   FM channels: 5-6 channels (5 channels with PCM, 6 channels without PCM)
   The YM2612 has six channels with four operators per channel.
   Used in arcade machines, Sega Mega Drive/Genesis (1988), Fujitsu FM Towns (1989)
   8 algorithms. The envelopes, frequencies and LFOs can be changed to get a good range of FM sounds.

    The YM3438 is a modified CMOS version of the YM2612 
   I recently built a DAFM synth using the YM3438.


1987
       YM2414 (OPZ, four Operator Type-Z), 2 LFOs, 8 waveforms
       Used in TX81Z, DX11, YS100, YS200, PortaTone PSR-6300 and PSR-80

1987
         YM2413 (OPLL) .... cost reduced FM synthesis sound chip. Used in the SEGA Mark III &
                                        Yamaha SHS-10 (1987)

        YM2413-B   (OPLL revision2)
        YM2413-F(OPLL-compatible flat package)


1988
        YMF262-M(OPL3-L)
        Used in  many of ALM Busy Circuits Akemie’s eurorack modules... like the castle.
        OPL3 stands for FM operator type L. Mostly SMD format. ... really cheap on ebay.
        The YMF262 was used in many sound cards, such as the Sound Blaster Pro 2.0,
        Sound Blaster 16 ASP and Creative Labs AWE family
         

     Four op FM. .... pairing 2 channels together to create up to six 4 operator FM voices
    4 channel sound output
    4 new waveforms (alternating-sine, "camel"-sine, square and logarithmic sawtooth).
    In addition, 5 different rhythm sounds (BD,SD,Tom TOM, Top Cymbal & Hi hat cymbal) are available.
   Manual


1989
    YM2424 (OPZII, FM 4Operator Type-Z-II)
     Used in the Yamaha V50 synth

1990 ???
    YM2610(OPNB)
     used in  NeoGeo hardware. Needs an external DAC.Four FM channels
     (The YM2610B variant added two extra FM channels for a total of six)
     In the original chip, sound comes from 4 different generators, each having their own channels:
  • SSG (Software Sound Generator): 3 channels -- compatible with YM2149 (Atari ST)
  • FM (Frequency Modulation): 4 channels. 4 operators per channel.
  • ADPCM (Sample playback): 7 channels
  • Noise : one channel

1994
       YMF292 (SCSP)
        Used in the Sega Saturn, Sega Model 2/3
        This is actually a hybrid FM/PCM. It uses 32 channels (4-op).

1994
        YMF271 (OPX)

        used in Seibu SPI arcade board
        Again, its a hybrid FM/PCM chip.
        I think there are 9 channels  .. can configure the number of operators?? (Up to 4 op)

1994 ??
     YMF276-M(OPN2C-upper compatible?)
     It's a 6 channel FM synthesizer based on the Yamaha YM2203c.
     used in  FUJITSU FM TOWNSII

1985
      YM2608B(OPNA)
      Used in the NEC PC98 ... PC-8801 (1985)/PC-9801 (1986)
      16 voices, six FM channels, 4 operators.
      Uses the same algorithms as the DX21 ??


----------------------------------------------------------------------
  
    YM3438(OPN2C)
    YMF288-M(OPN3-L)

    YMF286-K(OPNB-compatible)
    YMF281-D(OPLL Another version?)
    Y8950(MSX AUDIO)

 -----------------------------------------------------------------------
**** OPL  is a  FM Operator Type-L

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

About the different types of Sound chips:
These ICs, were used in arcade game system boards, video game consoles, home computers, and PC sound cards.etc etc.
They are not all FM.

There are 4  main systems:
1. PSG - programmable sound generators
2. Wavetable synthesis
3. FM synthesis
4. Pulse Code Modulation

Link - wikipedia

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FM Index
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Friday, 8 November 2019

Wasp filter Vintage and AE modular

I'm just getting into the AE modular.
The lovely small format is esp useful for live performance.
I can carry a whole modular in a small suitcase.
And its battery powered.

A friend asked me to do a video comparing WASP filters.
I hope this helps the community.


The Tangible Waves / Abused Electronics modular
https://www.tangiblewaves.com/


The WASP filter is based around a simple CMOS chip.
The 4069.... its an inverter.
If you're going to build one the CMOS ic has to be unbuffered  ... use CD4069UB
The original vintage circuit also uses the CA3080 ... a OTA...Operational Transconductance Amplifier

The AE modular wasp inspired filter uses vactrols for controlling the filter frequency.​




Links
+ Elby/kenstone
+ https://www.tangiblewaves.com/

Thursday, 7 November 2019

Jasper-Wasp build pics - part 1


Jasper Build notes. I'm building this for a friend.
These aren't official notes and I'm not a professional Synth Technician..
Just my personal thoughts to help me trouble shoot if I encounter any probs.

The official website where you can buy a kit is here:
jaspersynth.co.uk

There are lots and lots of CMOS ICs. This is almost a Lunetta synth. Here is my page on CMOS &  Lunetta synths


Anyway, the integrated circuits used in this build are mostly CMOS (with a smattering of the occasional op-amp). I've got a few old vintage WASPs and I love how they sound .esp considering the simple components.
This is the main Jasper PCB. The keyboard is attached.
I like how the colour of the keys is reversed.

 iT should be a fun build. This is a rev 2.2 , July 2017 PCB.


Here is a list of the ICs used.
LM386 or NJM386D
555
CMOS 555 like TLC555CP recommended
LM3900

CD4006 - shift register
CD4013 - dual flip flop
CD4016 -- analog bilateral switch
CD4019
CD4024 - shift register
CD4028
CD4040-- counter .. binary,ripple
CD4046 .. PLL phased locked loop... probably the VCO
CD4052 .... multiplexer.. dual 4 channel
CD4069UBE... its an inverter ... I think this is part of the wasp filter ???
CD4070... XOR gate
CD4071....quad two input OR gate
CD4081... quad 2 input AND gate
CD4503
LM13700
CD40103
CD40174

There are many ways to build this but I like to put the IC sockets on first.

Then caps, resistors, etc. All the simple non polarized stuff.

* R9 and R15 may need changing to adjust master oscillator tuning (4K7 on original).
** R56, R99, R163, R171 changed to 68K to adjust level of pulse/square when using osc vol pots. (150K on original)

For the moment, I'm using what's in the BOM.
R9 & R15 = 3K9
R56, R99, R163, R171 = 68K



Electro caps are polarized. Insert thus: Long lead in square hole.


The link port cable on the underside of the main board.
 The switched pots.


Fix everything into place then solder.

The rotary switches. You need 6 of these.
These are 2 pole, single level.

two alternatives
LorinCK1060
Alpha SR2612F

I went with the Lorin... more expensive.

 You need to cut the shaft to the right length.


You can set the number of positions with the key washer:
In the pic below, it's set to 4.

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

The original vintage circuit also uses the CA3080 ... a OTA...Operational Transconductance Amplifier instead of your standard Op-amp
An OP-AMP is a Voltage to Voltage amplifier.
The OTA is like a op-amp but the output is a current source instead of a voltage source.
Also the OTA has 3 inputs (unlike a op-amp with 2) . The 3rd input sets the gain with a current.

To be continued................. Part 2 of this build is here:
https://djjondent.blogspot.com/2020/02/jasper-build-notes-part-2.html

Links:
+ Jaspersynth
+ BOM
+ Build notes
+ DSL man.de
+ Knobs
+ Elby Knobs
+ Muffs 
+ Muffs - 1 
+ Muffs - Build thread 
+ Buying Jasper
Mouser cart
 

Sunday, 3 November 2019

172 - Dual Signal Leveler

This is a build I'm doing for a friend.
I don't have (or ever have seen an original 172)  vintage one. They must be very rare.
Do contact me if you have a original you'd like to sell.
Until that time, or until Buchla USA decides to make one, this will have to do.

Anyway, back to the build.

These boards are from LA67 in Spain.
They are based from original schematics so I hope will be close to the original.

rESISTORS first

Looks like a really easy build.


The original Buchla 100 catalogue describes the module as:
"Two high-gain, constant-output amplifiers. Output signal levels are maintained at 0db (plus or minus 1 db) for input variations from -40db to +10 db. Time constants are variable from .05 to 5 seconds."

So it appears to be a basic compressor/limiter with a time constant knob for each side.
The time knob I guess sets the attack/release compressor speed ??
A slow time probably provides very gentle changes in loudness where as a very fast time produces an aggressively signal.
 You will usually find in most compressors that even if the peak levels are set the same, a compressed signal will sound louder if it has a faster recovery time.
Im not sure if this module works the same

 Anyway, the build is all descrete components, & through hole.
Nice.


----------------------
Buchla Index
__________________

Tuesday, 22 October 2019

Buchla Power Supply Conventions

Buchla Power Supply conventions 

These PSUs changed over the decades so are confusing at times.
As I work my way through the modules that I own I'll update this post.
Please let me know if there are any errors.

Buchla 100
+15V, +24V, single ground.

Buchla 200 (early - Black Knob modules)
+15V, -15V, +/-24V, +5V, -5V, dual ground

Buchla 200 (late - "blue knob" modules)
+/-15 volts, +5 volts, +12 volts and 2 ground lines

Buchla 200e
Power on a Buchla 200e module is delivered from a  edac 306-010-500-102 connector.
The 200e cases come with a12 volt DC wallwart that connects to 3 DC-DC converters.
This is much safer & probably also helps in reducing background noise.

I've made some backup Buchla power supplies and the DC-DC converters  that I have successfully
used are:Cincon CHB75-12S05 (for the 5V),and two CHB75-12S15 for the +15/-15 lines.
CHB75-12S12 for the +12V.
If +24 is requited use a CHB75-12S24 DC/DC regulator. These codes are Mouser numbers.
1 Black - quiet ground
2 White: -15
3 Red: +15
4 Dark Green: +12
5 Orange: +5
6 Brown: noisy ground
7 polarizing key - no connection (use this to correctly orientate the EDAC.)
8 Yellow: i2c clock
9 Green: i2c data
10 no connection - (I often use this for supplying +24v)

==================================================================

 This is the type of connector you will see on a 200 and 200e system

1 Black - quiet ground
2 White: -15
3 Red: +15
4 NC
5 NC
6 Brown: noisy ground
7 NC
8 NC
9 NC
10  +24v

There are quite a few PSU's out in the market at the moment.
Of course the official Buchla supply is the standard and if you use anything else you do so at your own risk.

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