Search found 549 matches

by JanneI
Sat May 14, 2022 6:32 am
Forum: Music Tech DIY
Topic: WTF am I doing wrong with this sub osc circuit
Replies: 20
Views: 677

Re: WTF am I doing wrong with this sub osc circuit

Scope the clock input (TR1 collector) and compare it to the modern 4013 datasheet. The input signal is not fast enough. The reason why they used it with the SH-101 this way has to do with the phases while summing the rising saw of 3340 and the sub osc. ps. We modded the first edition of Black Corpor...
by JanneI
Sat May 14, 2022 2:02 am
Forum: Music Tech DIY
Topic: WTF am I doing wrong with this sub osc circuit
Replies: 20
Views: 677

Re: WTF am I doing wrong with this sub osc circuit

Just ditch the TR1 and use a square wave for an input signal, then all of those 4013 will work just fine.
by JanneI
Sun Mar 27, 2022 10:18 am
Forum: Music Tech DIY
Topic: How to find fitting Pots, Jacks and Switches and how to deal with differences
Replies: 8
Views: 455

Re: How to find fitting Pots, Jacks and Switches and how to deal with differences

Two PCBs? Take a look at different DIY modules and compare BOMs. It's a struggle for sure, but also the name of the game, googling part numbers and datasheets, endlessly. Good luck!
by JanneI
Thu Mar 17, 2022 8:29 am
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - Available!
Replies: 369
Views: 26299

Re: PROGUE - Analog mono synth - Available!

Altitude909 wrote: Thu Mar 17, 2022 7:13 am just get them made up somewhere, its way less than you think..
Yeah, I guess. Nevertheless, it wouldn't change the fact that there are no chips. If only times would "normalize" soon..
by JanneI
Thu Mar 17, 2022 4:11 am
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - Available!
Replies: 369
Views: 26299

Re: PROGUE - Analog mono synth - Available!

Yes, we are living in frustrating times when even mechanical switches can become suddenly obsolete. I haven't had time to check these out, but they look promising: https://www.te.com/usa-en/product-1-1825289-0.html If you do find an alternative that works, please share the details here. The enclosur...
by JanneI
Sat Feb 26, 2022 12:37 pm
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - Available!
Replies: 369
Views: 26299

Re: PROGUE - Analog mono synth - Available!

I thought I'd share this 4-voice demo I made

by JanneI
Thu Feb 24, 2022 11:40 am
Forum: Music Tech DIY
Topic: Feedback please- parts naming uF/nF/pF units
Replies: 31
Views: 1078

Re: Feedback please- parts naming uF/nF/pF units

Metric system basics. Applies to caps in the power of 10^(-3), 10^(-6), 10^(-9), 10^(-12), which are milli, micro, nano, pico. Everyone is 1000x bigger/smaller. No decimal points either, use the unit for decimal point, like: 4u7 (=4.7uF) 4n7 (=0.0047uF) 4p7 (=4.7pF) The same applies to resistors, 10...
by JanneI
Wed Feb 02, 2022 2:06 am
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - Available!
Replies: 369
Views: 26299

Re: PROGUE - Analog mono synth - Available!

SUCCESS!! I had to harvest an STM32 from a dev board I got off Amazon lol. The other saver was getting a good solder wick. Turns out they aren’t all created equal. :sb: :yay: :hyper: That's good news! Those dev boards are pretty much the only way to find (real) SMT32F's at the moment. -Janne
by JanneI
Fri Jan 28, 2022 2:41 pm
Forum: Music Tech DIY
Topic: Where is Oldcrow
Replies: 53
Views: 3765

Re: Where is Oldcrow

I did buy his Crowminius back in 2016 or something and I did get the PCB pretty soon after purchasing. My build got stuck in the "design and build a proper enclosure" -phase, so I'm not sure if he ever finished the firmware for the midi2cv or the USB port. Besides that, no complaints. The ...
by JanneI
Fri Jan 28, 2022 3:25 am
Forum: Music Tech DIY
Topic: Where is Oldcrow
Replies: 53
Views: 3765

Re: Where is Oldcrow

It's all about communication. If there's a (human) reason for the delay, people generally understand, even when 2 years behind. If there's nothing, only radio silence, people tend to get anxious. It's pretty easy to stop these "scammer!!" accusations simply by communication. Takes 1min, do...
by JanneI
Thu Jan 27, 2022 5:55 pm
Forum: Music Tech DIY
Topic: Where is Oldcrow
Replies: 53
Views: 3765

Re: Where is Oldcrow

Here's another one (not oldcrow), two years late already...read the comments.
by JanneI
Tue Jan 25, 2022 7:53 am
Forum: Music Tech DIY
Topic: this is a stupid question but..with the SSI chips so good, how come there are so few DIY polysynth kits?
Replies: 65
Views: 3395

Re: this is a stupid question but..with the SSI chips so good, how come there are so few DIY polysynth kits?

Little do I know of musical applications, but I suspect Penderecki, Ligeti, Xenakis and a few others would beg to differ. Sure, but can you seriously argue that the majority of the customers will need this full-polyphony -feature? I argue that in this kind of synth the majority of the voice cards w...
by JanneI
Sun Jan 23, 2022 8:03 am
Forum: Music Tech DIY
Topic: this is a stupid question but..with the SSI chips so good, how come there are so few DIY polysynth kits?
Replies: 65
Views: 3395

Re: this is a stupid question but..with the SSI chips so good, how come there are so few DIY polysynth kits?

You know how pianos have sustain pedals? These have three uses: the first is just let a note linger while your hand is repositioning; the second is to allow vibrating strings to be rehammered for greater volume; but the third is to get more overlapping tails of notes. Is the sustain pedal on a pian...
by JanneI
Sun Jan 23, 2022 6:56 am
Forum: Music Tech DIY
Topic: this is a stupid question but..with the SSI chips so good, how come there are so few DIY polysynth kits?
Replies: 65
Views: 3395

Re: this is a stupid question but..with the SSI chips so good, how come there are so few DIY polysynth kits?

I suspect that there is a new DIY sweetspot though: for the polymoog/Korg3300 "synth under every key" synth. This is because it is so cheap to mass product the voicing cards using SMT and PCB assembly services to do most of the populating. Back in the day, the reason for full polyphony wa...
by JanneI
Sat Jan 22, 2022 1:07 pm
Forum: Music Tech DIY
Topic: this is a stupid question but..with the SSI chips so good, how come there are so few DIY polysynth kits?
Replies: 65
Views: 3395

Re: this is a stupid question but..with the SSI chips so good, how come there are so few DIY polysynth kits?

The hard part is those decisions on what to include and what to leave out. You cannot "add another module" and even if you do, it will probably have to be x-times-the-polyphony. And if you do add more analog circuitry, this also needs to be taken into account in the user interface. It's no...
by JanneI
Thu Jan 20, 2022 3:01 am
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - Available!
Replies: 369
Views: 26299

Re: PROGUE - Analog mono synth - Available!

Greetings Any idea when "PANEL + PCB SET (PRE-POPULATED W/SMT) (I)" might be available again? Sorry if I missed it somewhere, just trying to read through the thread and the website Hi! Unfortunately, the global IC shortage is making it near impossible to restock at the moment. The MCU, DA...
by JanneI
Wed Jan 19, 2022 9:42 am
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - Available!
Replies: 369
Views: 26299

Re: PROGUE - Analog mono synth - Available!

Thanks for sharing, very very cool!
by JanneI
Sun Jan 16, 2022 10:34 am
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - Available!
Replies: 369
Views: 26299

Re: PROGUE - Analog mono synth - Available!

Guess what works now lol. Everything works and it responds properly to midi on ch 5. Thanks!! Now, as for the one I did the smd work on, all of the analog works as it should. I have a replacement STM32, but the last pin is broken (they put it on a piece of foam and wrapped it in shrink wrap, causin...
by JanneI
Sun Jan 16, 2022 3:55 am
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - Available!
Replies: 369
Views: 26299

Re: PROGUE - Analog mono synth - Available!

Having some issues with MIDI. I have 2 units, one was just bare PCB's and the other was all smd presoldered. When I finished the bare boards, i was able to load the firmware in, but it was not responding to midi. I could see the messages coming it, but nothing at the output. Thinking I messed up a ...
by JanneI
Fri Dec 31, 2021 10:45 am
Forum: Music Tech DIY
Topic: Getting into SMD DIY any reccomendations?
Replies: 49
Views: 2156

Re: Getting into SMD DIY any reccomendations?

If you are into non-Eurorack, try our (Polymoog) Resonator as a first SMD build
https://www.jsisynth.com/resonator.html

and when you have acquired some confidence, move on to Progue if your up for a vintage-sounding Moog:
https://www.jsisynth.com/progue.html
by JanneI
Wed Dec 22, 2021 9:55 am
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - Available!
Replies: 369
Views: 26299

Re: PROGUE - Analog mono synth - Available!

Update: the last 2 PCB-A's left, also only 2 white enclosures left.
by JanneI
Sat Dec 18, 2021 2:06 pm
Forum: Music Tech DIY
Topic: My 2131 VCO
Replies: 26
Views: 1314

Re: My 2131 VCO

And quite honestly in this day and age of low cost PCB fab and assembly in China there is no reason for even the DIY crowd, nor even the bedroom modular businesses, to not use tiny packages like these. DIY = Design-it-yourself or DIY = Build-it-yourself or Do-it-yourself as in Do-Exactly-What? :hih...
by JanneI
Thu Dec 16, 2021 10:07 am
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - Available!
Replies: 369
Views: 26299

Re: PROGUE - Analog mono synth - Available!

A little heads-up: Only 5 PCB-A (pre-soldered SMTs) and 5 enclosures for Progue are left at jsisynth.com. A new PCB-A batch is NOT planned in the near future due to the IC shortage, so act now if you want one. (We do have plenty of PCB only -bundles if you want to do it all from scratch with the Ham...
by JanneI
Mon Dec 13, 2021 2:39 pm
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - Available!
Replies: 369
Views: 26299

Re: PROGUE - Analog mono synth - Available!

diophantine wrote: Mon Dec 13, 2021 10:40 am I'm very familiar with this technique (and have a box with a switch for it), but it would be nice to have when not using it with MIDI...
We can add that to the next update.

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