Search found 507 matches

by Boogie
Wed Jan 01, 2020 5:00 pm
Forum: Music Tech DIY
Topic: DIY JPTR 8 clone *** New VCO Core Picture ***
Replies: 422
Views: 51854

Re: DIY JPTR 8 clone *** New VCO Core Picture ***

Dear fellow MW's, First of all: Best wishes for 2020 to you all for you and your family. Apologies for disappearing all the sudden. I will not go into detail in this forum. It's great to see people think I may have sold my IP. The way I read such a post is: "Wow, that guy must have been doing great ...
by Boogie
Wed Aug 21, 2019 6:38 am
Forum: Music Tech DIY
Topic: DIY Clap'a'Trap ** Assembly Results & Trigger Update ***
Replies: 169
Views: 15457

@ Puzzler The soldering is done well ! :yay: I do see some flux left over between the pins of the opamp U11 1-2 I may have found a short between U11 5-6. pls check. Both these opamps are in the ensemble envelope generator. It should be possible to trim the voltage of U11 pin 1 to below 1.2V. If not,...
by Boogie
Sat Aug 10, 2019 9:12 am
Forum: Music Tech DIY
Topic: DIY Clap'a'Trap ** Assembly Results & Trigger Update ***
Replies: 169
Views: 15457

rbv2 just a consideration that came to my mind, if the PCB is soldered with the water washable solder from Kester, you may have found the problem. Turns out it is conductive ! (not as in 0 Ohm, but it leaks current between the joints) So in that case, pls rinse you PCB very thorough with a water an...
by Boogie
Sat Aug 10, 2019 1:29 am
Forum: Music Tech DIY
Topic: DIY JPTR 8 clone *** New VCO Core Picture ***
Replies: 422
Views: 51854

groove
devinw1
Portabella

Hello all,

I slowed down, yes.
It will arrive, though not on extreme short term.

I hope to be posting again in a couple weeks.

B rgds,
Boogie
by Boogie
Sat Aug 10, 2019 1:26 am
Forum: Music Tech DIY
Topic: DIY Clap'a'Trap ** Assembly Results & Trigger Update ***
Replies: 169
Views: 15457

Hello rvb2 , as the schematics are not exactly like the original, and as it took a lot of work, optimizing, redesigning and fine tuning them, I can not disclose them. All necessary info has been published. Nevertheless, pls send some detailed in focus pictures by PM to me, I'll gladly review them. T...
by Boogie
Tue Jul 09, 2019 10:24 am
Forum: Music Tech DIY
Topic: DIY Clap'a'Trap ** Assembly Results & Trigger Update ***
Replies: 169
Views: 15457

Dear Puzzler

apologies for the late reply.
I can not find you in my order forms, did you buy this module from someone else ?

Can you post or PM some detailed pictures of your assembly ?
The modif should work.
by Boogie
Mon Jun 03, 2019 3:16 pm
Forum: Music Tech DIY
Topic: DIY JPTR 8 clone *** New VCO Core Picture ***
Replies: 422
Views: 51854

Image
by Boogie
Mon May 27, 2019 1:18 pm
Forum: Music Tech DIY
Topic: DIY JPTR 8 clone *** New VCO Core Picture ***
Replies: 422
Views: 51854

Image
by Boogie
Thu May 02, 2019 11:13 am
Forum: Music Tech DIY
Topic: Bad Cynare! No!
Replies: 11
Views: 1609

Hello schmynth I will breadboard the thing and experiment with the resistor values, Well, euhm... breadbording and avoiding crosstalk don't really go hand in hand. Creating crosstalk on the other hand... I'm not shure what you mean by changing the wiring Try to avoid running unshielded wires over sw...
by Boogie
Wed May 01, 2019 10:13 am
Forum: Music Tech DIY
Topic: Bad Cynare! No!
Replies: 11
Views: 1609

Cross talk and common impedance, that's what you're suffering from. You might want to start with un-bundling the wires you may have bundled. That should already do one another. for the common impedance in the PCB's power supply distribution, there's not much to do (apart from redesigning) except add...
by Boogie
Wed May 01, 2019 9:45 am
Forum: Music Tech DIY
Topic: DIY JPTR 8 clone *** New VCO Core Picture ***
Replies: 422
Views: 51854

Image
by Boogie
Wed May 01, 2019 9:38 am
Forum: Music Tech DIY
Topic: DIY JPTR 8 clone *** New VCO Core Picture ***
Replies: 422
Views: 51854

Hello all, Picture of Low voltage VCO below. Soldering is less good, but was for evaluation only (prototyping) As I've put quite some time into optimizing and component selection, I prefer not to disclose the used IC's yet. Thank you for understanding. https://www.muffwiggler.com/forum/userpix2/3379...
by Boogie
Sun Apr 28, 2019 9:05 am
Forum: Music Tech DIY
Topic: DIY JPTR 8 clone *** New VCO Core Picture ***
Replies: 422
Views: 51854

Low Power VCO core The screen dump below shows a tuning analysis over 8 octaves. The B7 indicates +100 cent which is C8 +/- 0 cent. Initial tuning of C4 after 20 sec was +9 cents. Below a sceen dump after a warm up of 10 minutes. (after all, it's analog...) https://www.muffwiggler.com/forum/userpix2...
by Boogie
Sun Apr 28, 2019 2:52 am
Forum: Music Tech DIY
Topic: DIY JPTR 8 clone *** New VCO Core Picture ***
Replies: 422
Views: 51854

tobb That would be cool,should be +/-15v compatible then to. All frequency influencing circuits are supplied by local stabilized references and all opamps can handle more than +/- 15V. I did that as an oscillator should not depend on the stability of its supply which I see is unfortunately happenin...
by Boogie
Sat Apr 27, 2019 12:46 pm
Forum: Music Tech DIY
Topic: DIY MiniP7 Minipops7 clone *** Ext Trig and Audio Outs ***
Replies: 85
Views: 11838

Hi xi-bot , thanks for bringing that to my attention. Makes me realize I didn't update my site for a while. In the mean time, I've added the file to this post. In a way, I like the fact that you need it, means you're there already ! Great :yay: see attachment :guinness: PS PM-ed you the same file.
by Boogie
Sat Apr 27, 2019 9:57 am
Forum: Music Tech DIY
Topic: Where Can I find one of these pots in Europe?
Replies: 9
Views: 913

Hi CliffordMilk it's reversed log as MikeDB mentions, but the reverse of the D curve, not the A curve. You can find the details here: https://www.alps.com/prod/info/E/HTML/Potentiometer/RotaryPotentiometers/RK097/RK097_common.html Go to the bottom of the page and compare right column of pictures the...
by Boogie
Sat Apr 27, 2019 9:43 am
Forum: Music Tech DIY
Topic: DIY JPTR 8 clone *** New VCO Core Picture ***
Replies: 422
Views: 51854

Hello all, short update about the low power VCO I've been working on. I forgot to order 1 chip , so I populated it with an SO8 (placed vertical and some small wires) instead of a VSSOP8. Fully functional, but not so nice to show pictures yet. That'll be for 2nd half next week when the part arrives. ...
by Boogie
Thu Apr 25, 2019 2:42 am
Forum: Music Tech DIY
Topic: DIY - Elektor Vocoder - General Build Thread
Replies: 390
Views: 26442

yan6 The signal at pin 6 A29 should look something like the yellow line o the plot below. It's the envelope of the voice signal with for each filter a different time constant. I should thus be a fluent line representing the particular filter's envelope response. You should get likewise graphs at al...
by Boogie
Fri Apr 19, 2019 5:34 am
Forum: Music Tech DIY
Topic: DIY MiniP7 Minipops7 clone *** Ext Trig and Audio Outs ***
Replies: 85
Views: 11838

Brendanleespengler
Thanks for the heads up. :chug:

I still have a couple kits available for those who would like to build one.

I've PMed you.
by Boogie
Sun Apr 14, 2019 8:19 am
Forum: Music Tech DIY
Topic: DIY JPTR 8 clone *** New VCO Core Picture ***
Replies: 422
Views: 51854

Hello all, An in between update. Before finishing the new voice boards I have been working on some low power VCO saw cores. These cores will have a lesser power consumption of at least 100 mW @ 30V compared to the original schematic. (and thus less self heating) All this without sacrificing the puri...
by Boogie
Sun Apr 14, 2019 8:08 am
Forum: Music Tech DIY
Topic: DIY JPTR 8 clone *** New VCO Core Picture ***
Replies: 422
Views: 51854

Image
by Boogie
Sun Apr 14, 2019 8:06 am
Forum: Music Tech DIY
Topic: DIY JPTR 8 clone *** New VCO Core Picture ***
Replies: 422
Views: 51854

Hi looneytoonz I guess my biggest concern was the case Yes, I will provide the case. If BOMs are published for each option, that would be very helpful At the time, I will certainly release the BOMs. SynthCube (US) kitted components for almost all parts They are on my list to be contacted, or if they...
by Boogie
Sun Apr 14, 2019 2:29 am
Forum: Music Tech DIY
Topic: DIY MiniP7 Minipops7 clone *** Ext Trig and Audio Outs ***
Replies: 85
Views: 11838

Individual instrument outputs I'm providing this info since several requested it, though It is strongly advised NOT TO implement this modif. Main Risks - damaging/breaking the resistor contact on PCB and/or resistor - insertion of hum - overall damaging beyond repair - introducing shorts Below are ...
by Boogie
Sun Apr 14, 2019 1:41 am
Forum: Music Tech DIY
Topic: DIY MiniP7 Minipops7 clone *** Ext Trig and Audio Outs ***
Replies: 85
Views: 11838

grenert
Guess I'll have to come up with my own rhythms now!
That's right, and might be a bigger chalenge then building electronics 8-)
by Boogie
Sat Apr 13, 2019 7:48 am
Forum: Music Tech DIY
Topic: DIY JPTR 8 clone *** New VCO Core Picture ***
Replies: 422
Views: 51854

darmklacht@gmail.com No problem leave me in. I might end up still going along... who knows. I just can´t commit right now. No problem, who knows what time brings. Always welcome. looneytoonz Are your kits meant to be complete (i.e. PCBs + All Components + case)? I'm just curious what else I would n...

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