Search found 140 matches

by honeyb
Wed Sep 02, 2020 1:40 am
Forum: Music Tech DIY
Topic: [Build] Oakley Discrete Ladder Filter
Replies: 6
Views: 462

Re: [Build] Oakley Discrete Ladder Filter

I'm looking forward to welcoming the Diode Superladder to my Eurorack synth. Though the Croglin also sounds interesting.
by honeyb
Tue Jun 23, 2020 2:39 pm
Forum: Music Tech DIY
Topic: Entry Point for Choosing a Eurorack Module to DIY
Replies: 10
Views: 353

Re: Entry Point for Choosing a Eurorack Module to DIY

I'm a big NLC fan, Andrew is awesome and his modules even more so. If you email him, he can suggest some easy to build modules from his lineup. I've also found that surface mount isn't that much harder than through hole (at least with the part sizes NLC uses).
by honeyb
Tue Jun 23, 2020 2:22 pm
Forum: Music Tech DIY
Topic: Conditioning multiple inputs with transistors-- SUCCESS
Replies: 11
Views: 478

Re: Conditioning multiple inputs with transistors-- FAIL

Got it working! It was a short in the panel wiring. Thanks, Emmaker, Elektrouwe!

+glenn
by honeyb
Mon Jun 22, 2020 7:04 am
Forum: Music Tech DIY
Topic: Conditioning multiple inputs with transistors-- SUCCESS
Replies: 11
Views: 478

Re: Conditioning multiple inputs with transistors-- FAIL

ok, thanks. If you think it is weird, this tells me that the circuit *shoud* work and I need to hunt for a wiring error. That is easier than ripping it out and replacing it with an opamp based solution. it is all soldered up on one of the sourcery studios proto boards from Thonk https://www.thonk.co...
by honeyb
Mon Jun 22, 2020 1:09 am
Forum: Music Tech DIY
Topic: Conditioning multiple inputs with transistors-- SUCCESS
Replies: 11
Views: 478

Re: Conditioning multiple inputs with transistors-- FAIL

Screen Shot 2020-06-21 at 21.00.11.png 2 transistor nets connected to the 2 inputs of one gate on the CD4070, the output via a 1N4148 diode to the output. The same to the second gate of the CD4070. Third and fourth gates, all inputs wired directly to ground, outputs hanging. Sorry the circuit diagr...
by honeyb
Sun Jun 21, 2020 3:22 pm
Forum: Music Tech DIY
Topic: Conditioning multiple inputs with transistors-- SUCCESS
Replies: 11
Views: 478

Re: Conditioning multiple inputs with transistors-- FAIL

Thanks, Elektrouwe. I actually have 100K pulldown resistors from the Q2 collector/CMOS inputs to ground. Left them out of the diagram, sorry. Perhaps 100K is too much? I can adjust R4 to 47k, and yes, I can see that where it sits now, the input is going to have to be well over 1V to open up the 2N39...
by honeyb
Sun Jun 21, 2020 2:55 pm
Forum: Music Tech DIY
Topic: Conditioning multiple inputs with transistors-- SUCCESS
Replies: 11
Views: 478

Conditioning multiple inputs with transistors-- SUCCESS

I'm building a Eurorack module which routes input signals into a logic chip (currently an CD 4070 XOR). Naturally, I don't want to wire the input jacks directly to the logic gates, would rather that a CD4070 input goes "high" when the associated jack is above say 1V, and at ground otherwise. Simple ...
by honeyb
Tue May 26, 2020 9:47 am
Forum: Eurorack Modules
Topic: What modules would you suggest (beginner build)
Replies: 9
Views: 611

Re: What modules would you suggest (beginner build)

Just about anything from NonLinear Circuits. Truly unique sounds. the X-output of the Hypster run through a spring reverb sounds like an animal calling out. Bools lets you XOR audio signals and convert them to slew'ed CVs. Nuts. Beat Freq pulsates based on which of two input "oscillators" is going f...
by honeyb
Fri May 01, 2020 5:02 am
Forum: Eurorack Modules
Topic: LPG to complement Natural Gate
Replies: 43
Views: 2452

Re: LPG to complement Natural Gate

Wow, this may be a first in MW history... A thread where I'm advised not to buy all the things! :yay: I appreciate input. HP isn't an issue. I don't really need more channels neccessarily, I was looking for something that had a different character, another "flavor" as it were. For instance, I was a...
by honeyb
Sun Mar 29, 2020 5:43 am
Forum: Eurorack Modules
Topic: Kudos to Make Noise!
Replies: 22
Views: 1616

Re: Kudos to Make Noise!

I hand-soldiered all my modules, what are you - some kind of weakling?! My intertonal bleeps and bloops are formed with tears, sweat and fried electronic parts! What, no blood? no burnt flesh? And you claim to hand-solder. Weakling! You're the type who probably only solders when sober and well rest...
by honeyb
Thu Jan 30, 2020 4:54 pm
Forum: Music Tech DIY
Topic: surface mount-- solder chips first
Replies: 44
Views: 2860

Re: surface mount-- solder chips first

That's what I thought.
by honeyb
Thu Jan 30, 2020 4:41 pm
Forum: Music Tech DIY
Topic: surface mount-- solder chips first
Replies: 44
Views: 2860

surface mount-- solder chips first

I'm wondering why the standard advice with surface mount soldering is to solder the chips first? Aren't you more likely to damage them by mucking around you do on the board with them installed?
by honeyb
Fri Jan 24, 2020 4:27 pm
Forum: Eurorack Modules
Topic: Erica Synths Black Sequencer
Replies: 394
Views: 19408

Re:

mdoudoroff wrote:
Mon May 13, 2019 1:51 am
Added to my comparison, although we are still missing many details:

http://doudoroff.com/sequencers/
This is an incredible resource. Thank you
by honeyb
Fri Jan 24, 2020 4:22 pm
Forum: Eurorack Modules
Topic: Things you've shifted 180deg on over the years?
Replies: 80
Views: 8349

Re: Things you've shifted 180deg on over the years?

2-3 years in. Really learning to love surface mount soldering, but no other major shifts. Still a strong preference for analog/cmos, for DIY, for understanding the electonics behind the sound... but that's why I got into it. I spend my days working on Von Neuman architecture computers. My synth is a...
by honeyb
Fri Jan 24, 2020 4:18 pm
Forum: Eurorack Modules
Topic: Things you've shifted 180deg on over the years?
Replies: 80
Views: 8349

Re: Things you've shifted 180deg on over the years?

acidbob wrote:
Fri Jan 24, 2020 3:27 pm
Drugs and girls
So... it used to be girls and drugs, now it is drugs and girls?

I'm guessing there is a back story... but hopefully no photographic evidence, for your sake!
by honeyb
Tue Dec 17, 2019 6:27 am
Forum: Eurorack Modules
Topic: Unveil your secrets
Replies: 62
Views: 7877

orangehexagon wrote:I've been really into using my hands in lieu of CV
want to make a NSFW comment, but holding back...
by honeyb
Fri Nov 08, 2019 3:17 am
Forum: Music Tech DIY
Topic: transistor not working as a switch
Replies: 7
Views: 656

Re: transistor not working as a switch

Connect base to negative rail, again 200K resistance. When you did this, you probably destroyed the transistor. The 2N3904's base-emitter junction is only rated for 6V of reverse voltage, so negative 12V applied through a 1k resistor is going to push it way beyond its absolute maximum limits. Throw...
by honeyb
Fri Nov 08, 2019 3:16 am
Forum: Music Tech DIY
Topic: transistor not working as a switch
Replies: 7
Views: 656

do you have your probes going the right way on the meter? current can only flow one way through the transistor. i just did some tests on a 3906 here, and i get 4ohms when on, infinite when off, and a few megohms when floating (which is odd). Another thing I didn't think of... Thanks! And yes, the F...
by honeyb
Fri Nov 08, 2019 3:13 am
Forum: Music Tech DIY
Topic: transistor not working as a switch
Replies: 7
Views: 656

What are you connecting the collector and emitter to? If they're not connected to anything but the Fluke then I don't think your readings will be very meaningful. You are right, they were left hanging. You could try this: Connect the collector to the positive rail via a resistor of your choice e.g....
by honeyb
Thu Nov 07, 2019 3:39 pm
Forum: Music Tech DIY
Topic: transistor not working as a switch
Replies: 7
Views: 656

transistor not working as a switch

ok, a total :bang: problem which is probably very simple if you know what you are doing.... I want to use a transistor as a switch, preferable a 2n3904 because I have a bunch. Standard NPN transistor. Yes, I've read the Nuts and Volts article https://www.nutsvolts.com/magazine/article/may2015_Secura...
by honeyb
Tue Nov 05, 2019 4:14 am
Forum: Music Tech DIY
Topic: My Weston Audio 2VL1 Build Diary
Replies: 27
Views: 1912

I'm finding the module to be very flexible with all its features, lots of interesting sounds modulating itself with itself (with itself)! I'm toying with the idea of using it as a primary and secondary oscillator for a complex VCO, with the LFO being extra icing for the project. Agreed! Interested ...
by honeyb
Tue Nov 05, 2019 4:12 am
Forum: Music Tech DIY
Topic: 2VL1 Dual 40106 VCO + LFO 12HP Euro DIY
Replies: 27
Views: 2687

devinw1 wrote: Hope that helps! :guinness:
Sure does! All questions answered, thanks for the awesome support!
by honeyb
Sun Nov 03, 2019 3:03 pm
Forum: Music Tech DIY
Topic: 2VL1 Dual 40106 VCO + LFO 12HP Euro DIY
Replies: 27
Views: 2687

Double VCOs, double posts! :lol: Thanks for the post! I'm glad it went well for you! Yes, the coarse knob has a very large swing, mainly so you can drag it to a large range of pitches even if your device (Say a beat step pro) is defaulting to output a CV like 5V... But this means if you have no CV,...
by honeyb
Sun Nov 03, 2019 2:57 pm
Forum: Music Tech DIY
Topic: I made a new thing (kick drum + bass material inside)
Replies: 24
Views: 2315

Really happy with my 2VL1 dual osc, looking forward to this voice as well. Will then panel/PCB be available via THONK? Or is it easier to order directly from you? I have a US address which can handle small deliveries.
by honeyb
Sun Nov 03, 2019 2:41 pm
Forum: Music Tech DIY
Topic: My Weston Audio 2VL1 Build Diary
Replies: 27
Views: 1912

I went with Swedish colors

Sweet build! Hope you are loving them. I went for Swedish colors myself.Image

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