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.

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...

I am happy with SMD. Go with it.

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...

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.

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.

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...

What a real Turing machine looks like…

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/

Kristian has a youtube series on the Baby 8 and links to schematics. Perhaps these would help you? Baby 8 Sequencer on Youtube.

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

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?

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?

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...

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.

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, ...

If your question is about how did we get hobby artwork to the right size in the first place, in the UK there were companies that specialised in providing the PCBs for published projects, so we simply bought them. For the ETI 4600 and 5600S synths Maplin sold all the PCBs. For the ETI 4600 full-sized...

I use Photoshop. Nice information. But the question is what you did before modern software solutions existed? Well I once worked in printed circuit board factory. I'd prepare a film positive by placing sticky pads on acetate over a design drawn on paper with crepe tape to lay down the trackwork. Or...

I use Photoshop. There are usually some components that are on a 0.1" grid. I take the scan into Photoshop and make the grid. 0.1" and show grid. I then go into Image>Image size and without 'Resample Image', adjust the ppi, pixels/inch, until the grid matches up with the 0.1" grid. I use Osmond PCB ...

Glad you got fixed. I am sorry I was unable to help myself. I am not able to access my builds and documentation right now.

Hi Julian, I know your quality is excellent and the accuracy is really spot-on, but your camera doesn't show your panels in their best light.

I have various examples of Julian's front panels and they look way better than the snapshots he shows.

Adding a gusset where the deep part of the panel joins the flat part will increase stiffness. Even a thin web -to preserve panel width in this area- will be better than the short overlap shown in the original. I did a number of experiments on my cheap 3D printer and got some surprisingly successful...

Julian, you fill a niche that there is certainly a demand for. Your work is top quality and your attention to detail is really old skool. People, the bitter taste of a job gone wrong lasts a lot longer than the sweet taste of a cheap job. Yet Julian does seem to be able to give the likes of Schaeffe...

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I just had a reply from John at Kenton. I've replied sending him the transient schematic, so I expect he'll get back to me with a good solution. ---snip snippety snip from Kenton--- There is a setting on most of our converters that allows you to send a trigger of up 10V for Pro-Solo / 12.7V for Pro-...