Search found 675 matches

by whoop_john
Mon Jun 14, 2021 12:23 pm
Forum: Music Tech DIY
Topic: Eurorack PCB faceplate
Replies: 14
Views: 275

Re: Eurorack PCB faceplate

I am trying to design a PCB faceplate for my modules, but I am new to PCB design and I have some questions. The design: https://i.imgur.com/6O8IE8m.png When I upload it to JLCPCB, in the analyis section there are some exclamation mark. I don't know, that it's just a warning, or I have an issue with...
by whoop_john
Mon Jun 14, 2021 6:32 am
Forum: Music Tech DIY
Topic: History of Synth DIY: Opinions requested
Replies: 110
Views: 2218

Re: History of Synth DIY: Opinions requested

It seems as if we need at least a US timeline, a European timeline and an Australian timeline, as all these had different threads. It's probably a Hydra-headed monster.
by whoop_john
Mon Jun 14, 2021 6:26 am
Forum: Music Tech DIY
Topic: History of Synth DIY: Opinions requested
Replies: 110
Views: 2218

Re: History of Synth DIY: Opinions requested

If we're including names then Tim Orr has to come on it. Numerous magazine articles and projects, all of which worked rather then needing major reworking as many other authors' designs did. He also worked for EMS and Akai, where he produced some of the worst synth colour schemes in history :-) Agre...
by whoop_john
Sat Jun 12, 2021 6:30 pm
Forum: Music Tech DIY
Topic: History of Synth DIY: Opinions requested
Replies: 110
Views: 2218

Re: History of Synth DIY: Opinions requested

Well OK, but if you are talking about UK Modular, which does not include ANY of the above projects, as they were essentially pre-configured synths, Read the OP again. "We want to use it to create a synth-DIY 'timeline' of sorts." No mention of having to be modular, and indeed most DIY synths in the...
by whoop_john
Sat Jun 12, 2021 4:59 pm
Forum: Music Tech DIY
Topic: History of Synth DIY: Opinions requested
Replies: 110
Views: 2218

Re: History of Synth DIY: Opinions requested

From a British point of view, Synth DIY was helped along considerably by these three series of articles : Practical Electronics : http://www.timstinchcombe.co.uk/index.php?pge=pemini#pess Wireless World : http://yusynth.net/archives/WirelessWorld/Electronic-sound-Synthesizer.pdf ETI : https://encyc...
by whoop_john
Mon May 17, 2021 2:57 pm
Forum: Music Tech DIY
Topic: 5-way splitter
Replies: 3
Views: 295

Re: 5-way splitter

Did you just reinvent a 5 way version of the very cheap 6 way splitter, available easily from many sources? Image
by whoop_john
Wed Mar 24, 2021 12:36 pm
Forum: Music Tech DIY
Topic: SPDT (on)-off-on toggle switch sources
Replies: 13
Views: 828

Re: SPDT (on)-off-on toggle switch sources

htor wrote:
Wed Mar 24, 2021 8:10 am
thanks for the Ali tip!
I didn't find a "sub mini" size for the (ON)-OFF-ON SPDT switch, but that's fine really. Seems uncommon.
I gave you a link directly to the Aliexpress item - it's https://www.aliexpress.com/item/32759244103.html. It is submini. The height of the body is 7.5mm high.
by whoop_john
Tue Mar 23, 2021 10:51 pm
Forum: Music Tech DIY
Topic: SPDT (on)-off-on toggle switch sources
Replies: 13
Views: 828

Re: SPDT (on)-off-on toggle switch sources

I'm having a hard time source a sub mini SPDT (ON)-OFF-ON toggle switch for eurorack. I've found a nice one on Farnell, but they want my VAT number, and i don't have one. the same goes for RS and Mouser. they all want my VAT number, so i'm unable (it seems) to buy anything from them. :deadbanana: :...
by whoop_john
Sun Feb 28, 2021 3:38 pm
Forum: Music Tech DIY
Topic: Turing machine front end
Replies: 3
Views: 230

Turing machine front end

155517867_1422952048045403_8308517665498560272_o.jpg
by whoop_john
Tue Dec 29, 2020 12:27 am
Forum: Music Tech DIY
Topic: A joystick schematic acceptance
Replies: 10
Views: 467

Re: A joystick schematic acceptance

If you want there to be a middle dead zone where the voltage doesn't change, a couple of back-to-back diodes in parallel before the op-amp input is a good idea.
by whoop_john
Sat Dec 19, 2020 3:16 pm
Forum: Music Tech DIY
Topic: Help with MIDI wiring/switching
Replies: 6
Views: 222

Re: Help with MIDI wiring/switching

Midi merger? Didn’t know that word but it makes sense. Thanks, learned something today :tu: MIDI merging seems easy, until you realise you have to arbitrate if you get conflicting MIDI clock pulses from two or more sources at once, or you have a synth that sends running status, in which case you ha...
by whoop_john
Tue Dec 08, 2020 3:47 pm
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - Available!
Replies: 184
Views: 11244

Re: PROGUE - Analog mono synth - AUDIO DEMO

I am happy with SMD. Go with it.
by whoop_john
Sun Aug 16, 2020 4:13 pm
Forum: Music Tech DIY
Topic: Cheap pot caps for cheap pots
Replies: 11
Views: 590

Re: Cheap pot caps for cheap pots

How much do you people perspire? These are perhaps for ambient chill use only then. Seriously, they are going to be absolutely fine for me - I don't need vice grips to get them to turn. I'll ask my Chinese medicine practitioner and martial art teachers about the chrome and vanadium. This is an amaz...
by whoop_john
Thu Jul 30, 2020 12:03 am
Forum: Music Tech DIY
Topic: Cheap pot caps for cheap pots
Replies: 11
Views: 590

Re: Cheap pot caps for cheap pots

Sandrine wrote:
Wed Jul 29, 2020 1:58 pm
Haha! I like them! I have been using a 3D printer to knob those but these look so much nicer, I'm getting some
BTW which ones? 5 or 6mm?
I bet those 3mm's would work for 6x6 push button covers wow
I bought the 6mm internal diameter caps. Good idea about the 3mm ones for tactile buttons, Sandrine.
by whoop_john
Wed Jul 29, 2020 1:33 pm
Forum: Music Tech DIY
Topic: Cheap pot caps for cheap pots
Replies: 11
Views: 590

Re: Cheap pot caps for cheap pots

How much do you people perspire? These are perhaps for ambient chill use only then. Seriously, they are going to be absolutely fine for me - I don't need vice grips to get them to turn. I'll ask my Chinese medicine practitioner and martial art teachers about the chrome and vanadium.
by whoop_john
Wed Jul 29, 2020 6:39 am
Forum: Music Tech DIY
Topic: Cheap pot caps for cheap pots
Replies: 11
Views: 590

Cheap pot caps for cheap pots

I don't know if any of you use this style of pot which has a plastic shaft and screwdriver slot. I was looking for something to make them look a little better and found these caps on Aliexpress in the Jewellery section. They are shiny stainless steel. While not very deep, they do cap the knobs off w...
by whoop_john
Tue Jul 14, 2020 2:29 am
Forum: Music Tech DIY
Topic: [Project] Turing Machine Mk2
Replies: 605
Views: 62174

Re: [Project] Turing Machine Mk2

What a real Turing machine looks like…
Array Cell Address Check_2.jpg
by whoop_john
Fri Jun 26, 2020 3:15 pm
Forum: Music Tech DIY
Topic: MIDI - CV options?
Replies: 9
Views: 746

Re: MIDI - CV options?

I have a pair of Eurorack Modular Solos from Kenton. Not cheap, but full of useful features you won't find anywhere else and professional studio quality. Recommended.

https://kentonuk.com/product/modular-solo/
by whoop_john
Fri Jun 19, 2020 3:53 am
Forum: Music Tech DIY
Topic: What is wrong with my Baby8?
Replies: 6
Views: 458

Re: What is wrong with my Baby8?

Kristian has a youtube series on the Baby 8 and links to schematics. Perhaps these would help you? Baby 8 Sequencer on Youtube.
by whoop_john
Sun Jun 14, 2020 6:31 am
Forum: Music Tech DIY
Topic: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD
Replies: 224
Views: 13876

Re: OPERA ROTAS, a DIY mutant drum machine

Great... I didn´t know about the opera molas version. I thought opera rotas was the only know magic square in existence :D So this is for invoking femenine spirits? Juicy... There are a few more magic squares of this nature. Scope here for naming your future projects. https://i.imgur.com/Rwmnl4L.jpg
by whoop_john
Sat Jun 13, 2020 3:04 pm
Forum: Music Tech DIY
Topic: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD
Replies: 224
Views: 13876

Re: OPERA ROTAS, a DIY mutant drum machine

Or perhaps the other version:

SALOM
AREPO
LEMEL
OPERA
MOLAS

Coming under the rule of Venus, this is used to obtain the love of a maiden. What kind of QBListic magik is this infernal device of which you speak?
by whoop_john
Sat Jun 13, 2020 3:01 pm
Forum: Music Tech DIY
Topic: OPERA ROTAS, a DIY mutant drum machine BUILD THREAD
Replies: 224
Views: 13876

Re: OPERA ROTAS, a DIY mutant drum machine

Isn't the full version:

SATOR
AREPO
TENET
OPERA
ROTAS

The Greater Seal of Solomon, under the influence of Saturn. Will it work if you only use part of the spell?
by whoop_john
Tue May 12, 2020 11:32 am
Forum: Music Tech DIY
Topic: System700 clone: 14,4V
Replies: 3
Views: 350

Re: System700 clone: 14,4V

Hello, on the yusynth website I found several interesting System 700 schematics: http://yusynth.net/gear/R700_MC_en.html For example the VCA 704A/B required 14,4v for the LED control: http://yusynth.net/gear/ROLAND/R700-schematics/704-ABCD-VCA.pdf How can i generate the 14,4v? Or it works also with...
by whoop_john
Mon May 11, 2020 2:47 pm
Forum: Music Tech DIY
Topic: Std Res resistors
Replies: 11
Views: 588

Re: Std Res resistors

KSS wrote:
Sun May 10, 2020 2:43 pm
Good idea. There are quite a few here who have dealt with the Maplin 38,46,5600 synths.
Yes I built both a 4600 and a 5600s back in the day. Let me know if you get stuck.
by whoop_john
Tue May 05, 2020 7:39 am
Forum: Music Tech DIY
Topic: The horror of "PCB pattern is 1/4 normal size"
Replies: 13
Views: 1023

Re: The horror of "PCB pattern is 1/4 normal size"

Graphic designers and artists used Grant Enlargers to scale up artwork. You can Google them. They weren't cameras, just a mechanical machine with a lens. You put your original on the bottom under the lens, focused it up onto a glass plate where it could be traced over by hand. Art schools had them, ...

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