Search found 352 matches
- Mon Feb 22, 2021 2:17 am
- Forum: Music Tech DIY
- Topic: A quadrature triangle VCO
- Replies: 41
- Views: 606
Re: A quadrature triangle VCO
This looks very promising. And easier to understand and build then Don's core.
- Sun Feb 21, 2021 6:17 am
- Forum: Music Tech DIY
- Topic: Trapezoid quadrature through zero VCO (Euro version) with waveshapers
- Replies: 7
- Views: 350
Re: Trapezoid quadrature through zero VCO (Euro version) with waveshapers
Hello, long time lurker, first post here. I've had a quick email chat with Haralds:Werk and he doesnt want to answer individually, which anyone could understand. So here are my few silly questions (might have more later): At R10, is the tempco a PTC? What's OP's recommendations for ppm, series or t...
- Fri Feb 12, 2021 11:16 am
- Forum: Eurorack Modules
- Topic: Announcing ALM017 - Pamela's NEW Workout
- Replies: 2067
- Views: 165011
Re: Announcing ALM017 - Pamela's NEW Workout
I just received a new Pamelas NEW Workout and it is quite unusable. The OLED display is barely visible and there is no adjustment for brightness. Is this a known issue? And anything else to do as sending it back for replacement? Sounds like you got a bad unit. I’d exchange it. It’s not the brightes...
- Thu Feb 11, 2021 8:30 am
- Forum: Music Tech DIY
- Topic: Trapezoid quadrature through zero VCO (Euro version) with waveshapers
- Replies: 7
- Views: 350
- Thu Feb 11, 2021 8:01 am
- Forum: Music Tech DIY
- Topic: Trapezoid quadrature through zero VCO (Euro version) with waveshapers
- Replies: 7
- Views: 350
Trapezoid quadrature through zero VCO (Euro version) with waveshapers
This is my third take on the Trapezoid VCO core designed by Don Tillman. My first implementation for a 15V banana system with separate waveshaper can be found here . My second implementation for a 15V banana system with integrated waveshaper can be found here .This time I moved on to the 12V Eurorac...
- Wed Feb 10, 2021 10:44 am
- Forum: Eurorack Modules
- Topic: Announcing ALM017 - Pamela's NEW Workout
- Replies: 2067
- Views: 165011
Re: Announcing ALM017 - Pamela's NEW Workout
Looks quite normal to me. Or my display is also "kaputt". Sorry to hear, it's hard to read for you. Because it is actually one hell of a module. I actually like the dimness, because it doesn't distract or even dazzle like other modules. I believe I saw a discussion somewhere, on how to DIY-replace ...
- Wed Feb 10, 2021 8:59 am
- Forum: Eurorack Modules
- Topic: Announcing ALM017 - Pamela's NEW Workout
- Replies: 2067
- Views: 165011
Re: Announcing ALM017 - Pamela's NEW Workout
I just received a new Pamelas NEW Workout and it is quite unusable. The OLED display is barely visible and there is no adjustment for brightness. Is this a known issue? And anything else to do as sending it back for replacement? How bright your background lightning is? The display is quite dim. The...
- Wed Feb 10, 2021 5:37 am
- Forum: Eurorack Modules
- Topic: Announcing ALM017 - Pamela's NEW Workout
- Replies: 2067
- Views: 165011
Re: Announcing ALM017 - Pamela's NEW Workout
I just received a new Pamelas NEW Workout and it is quite unusable. The OLED display is barely visible and there is no adjustment for brightness. Is this a known issue? And anything else to do as sending it back for replacement?
- Fri Feb 05, 2021 6:06 am
- Forum: Music Tech DIY
- Topic: What's the 'best' way to get bipolar power from a wall-wart?
- Replies: 88
- Views: 1452
Re: What's the 'best' way to get bipolar power from a wall-wart?
I have build something like this for a standalone device with +/-15V output. Look here as a starting point:
https://www.haraldswerk.de/PSU/PSU_Sing ... ouble.html
Completely analog.
https://www.haraldswerk.de/PSU/PSU_Sing ... ouble.html
Completely analog.
- Sun Jan 31, 2021 3:23 am
- Forum: Music Tech DIY
- Topic: 6..36dB VCF Lowpass/Highpass
- Replies: 6
- Views: 304
Re: 6..36dB VCF Lowpass/Highpass
Nice project. I even wanted to assembly it but my PCB manufacturer said that Gerber files are out of his specs - vias diameters are too small (0.4mm, should be 0.8mm) and tracks distances are too small (7 mils, sometimes 4 mils, should be at least 8 mils). I've even tried to import Gerber files int...
- Wed Jan 20, 2021 2:48 pm
- Forum: Music Tech DIY
- Topic: Variable Attack/Release Slew
- Replies: 6
- Views: 214
Re: Variable Attack/Release Slew
Maybe you can use my schematic as starting point:
https://www.haraldswerk.de/Utilities/Slew/Slew.html
https://www.haraldswerk.de/Utilities/Slew/Slew.html
- Tue Jan 19, 2021 2:36 am
- Forum: Music Tech DIY
- Topic: The 2021 Show Us Your DIY Builds Thread!
- Replies: 114
- Views: 5590
- Mon Jan 18, 2021 9:34 am
- Forum: Music Tech DIY
- Topic: The 2021 Show Us Your DIY Builds Thread!
- Replies: 114
- Views: 5590
Re: The 2021 Show Us Your DIY Builds Thread!
Sequencer Nostalgia This was my first build when I came back to SDIY. A three row/16 step sequencer. Completely build on stripboard. Still working after all this years. Only hand sketched schematics. Nothing to publish. Pictures only. seq-ein.JPG img_0401.jpg img_0143.jpg img_0147.jpg img_0146.jpg
- Sun Jan 17, 2021 2:02 pm
- Forum: Music Tech DIY
- Topic: Scaled voltage reference with octave and semitone steps
- Replies: 18
- Views: 1074
Re: Scaled voltage reference with octave and semitone steps
Yes, that's correct. The 1N4004 are fore protecting from false polarity from the PSU. You can leave them out if not needed. You can leave the ferite out as well. Just replace them with wires.
- Sun Jan 17, 2021 8:53 am
- Forum: Music Tech DIY
- Topic: Scaled voltage reference with octave and semitone steps
- Replies: 18
- Views: 1074
Re: Scaled voltage reference with octave and semitone steps
1WILDTHING wrote: ↑Sun Jan 17, 2021 5:51 am
Hi there, I'm trying to build this module but I'm confused about how to wire switches.
Could you please give me some advices?
- Thu Jan 14, 2021 6:20 am
- Forum: Music Tech DIY
- Topic: 6..36dB VCF Lowpass/Highpass
- Replies: 6
- Views: 304
6..36dB VCF Lowpass/Highpass
This is the Eurorack version of my NGF 36dB VCF . I have brought out the 6dB, 12dB, 18dB, 24dB, 30dB and 36dB poles. You have two audio inputs for easy mixing sound sources. And CV inputs for linear TM, log TM, envelope, V/Oct tracking and emphasis. The exponential circuit is temperature compensated...
- Wed Jan 13, 2021 11:51 am
- Forum: Music Tech DIY
- Topic: Quad VCA, AC or DC coupled with normalized input
- Replies: 5
- Views: 330
- Wed Jan 13, 2021 2:59 am
- Forum: Music Tech DIY
- Topic: Utility Mixer I
- Replies: 9
- Views: 305
Re: Utility Mixer I
Nice one! Harald reigns as the productivity champ here on Muffs diy! More to come. Still working on my publishing backlog. And some new stuff. I have a running prototype of a Quadrature trapezoid through zero LFO with all the usual wave forms at 90deg apart. And working on a scanning mixer and harm...
- Wed Jan 13, 2021 2:54 am
- Forum: Music Tech DIY
- Topic: Utility Mixer I
- Replies: 9
- Views: 305
Re: Utility Mixer I
Heh, I had forgotten completely about overshoot. Thank you. As for the euro/banana distinction, I’m a banana person too, but is it the case that shielded cables present more difficult (more capacitive?) loads than single cable banana leads? The shielded cables have some capacitance. You can look at...
- Tue Jan 12, 2021 10:00 am
- Forum: Music Tech DIY
- Topic: Utility Mixer I
- Replies: 9
- Views: 305
Re: Utility Mixer I
Just added the correct links in my first posts.
- Tue Jan 12, 2021 9:58 am
- Forum: Music Tech DIY
- Topic: Utility Mixer I
- Replies: 9
- Views: 305
Re: Utility Mixer I
Nicely done as usual. Can I ask about the 5.6pF caps on some of the op amps please? Usually if I see those I think they are for stability but IC3A, 4A and 6A look like being the least likely to go unstable in the whole circuit. You don't have such caps on the output op amps for example. So I wonder...
- Tue Jan 12, 2021 5:07 am
- Forum: Music Tech DIY
- Topic: Utility Mixer I
- Replies: 9
- Views: 305
Utility Mixer I
This is an often used utility module. The mixer comes in handy for mixing CV sources. The mixer is DC coupled, so you can use it for DC and AC mixing. The input impedance is constant 1MOhm. The input signals are amplified by a factor of two. It is possible to offset every input with +/- 5V. The offs...
- Tue Jan 12, 2021 4:41 am
- Forum: Music Tech DIY
- Topic: ADSR for Eurorack derived from Elektor Formant
- Replies: 6
- Views: 293
Re: ADSR for Eurorack derived from Elektor Formant
Thank you. Here are some screenshots.dot matrix madness wrote: ↑Mon Jan 11, 2021 5:33 amNice to have a really working, simple AD/ADSR design.
- Mon Jan 11, 2021 4:23 am
- Forum: Music Tech DIY
- Topic: ADSR for Eurorack derived from Elektor Formant
- Replies: 6
- Views: 293
ADSR for Eurorack derived from Elektor Formant
This is another derivation off the ADSR from my NGF_E project , adapted to 12V Euro-rack format. Because this one is a stand alone module I have removed all additional features from the Next Generation Formant project. Nonetheless it is still based on original Elektor Formant ADSR schematic. I made ...
- Thu Dec 17, 2020 4:45 am
- Forum: Music Tech DIY
- Topic: Pitch to voltage converter
- Replies: 4
- Views: 330
Re: Pitch to voltage converter
Interesting! On my list of things to try one day are the specialised Burr Brown frequency to voltage IC's, as some of them are pretty accurate, but using a microcontroller is a lot more flexible, great idea! How does it work? Have you used it in a musical context? Yes, I am using it to steer my syn...