Yes. The dream. Making chords with 1/8 of my brain
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Snare Tom on stripboard by “Unauthorized Service” and schematics by @Dud
Unfortunately there is a constant hum at ~200Hz, slightly depending on tom pitch. The louder the tom volume is, the louder the hum gets (max 12v). TL072 is driven with +12V on pin8 and GND on pin4.
Kindly asking you for hints how to find the root cause and how to remove it.
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For hum I play hunt the ground. Change the power supply to eliminate it from your investigation, and create a loose ground cable (solder one end to any ground and leave one loose); then touch the loose end to every ground in the circuit, especially the pots and the ic. If you still find nothing I’d refloat every solder joint.
Adding additional grounds in a point to point star formation rather than relying on a loop can minimize noise.
Best of luck
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I 
it. There will be spares in the BST thread after you testetd the design 
our local hero never released his version (probably due to time constraints) and it would be humongous as far as we know.
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Absolutely, I’m going to be finishing it off soon but I’m pretty sure I won’t run into any problems if the first two rows work. That LMNC one did look pretty cool, but way overkill for me. I’m just using this for left channel, right channel and send return effects.
I’m also working on a mini version of this with one row.
Hopefully the design doesn’t look too look mum no computery, obviously there’s a lot of inspiration but I want to do my own thing 
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Hello everyone,
It’s my first time posting here, although I always love to see all of your setups and new modules coming to life !
In my eurorack journey, I finally can say I’m proud of what I have achieved and happy to share about it 
It’s been already a few years since I started making my modules, here’s a picture of a few of my first vero boards on the top row (some of which never seemed to work as expected), with faceplates cut in old records and my first attempts of PCB creations (kick and snare from Moritz Klein DIY schematics)…
Now, my fully working setup looks like this :
First row is mainly my drum section : kick, snare, tom, hi-hat.
I have built @analogoutput‘s arduino clock, as eurorack version, my latest build is lmnc Grr VCF (still in revision and for which I might ask a few questions here 1114 Funky Clipping Filter/VCA)…
In the lower row, it’s my synth voice based on Erica Synths DIY bassline, modulator and VCA, an envelope, @ChristianBloch’s Beaks, dreadbox’s echo DIY, nonlinearcircuits’ sloth, a multiple (passive and buffered) and a clock divider (I don’t remember to source of this circuit, made on vero board).
Below is my EDU DIY case, that I use to try and check my newer modules : fully working are my FM drum and drum sequencer (based on Moritz Klein designs again)…
On top of my rack is my MIDI to CV module (Erica Synths DIY) and an old Monacor mixer I tweaked a little.
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hi everyone hope you are all well . I haven’t posted in awhile , just lurking here and there . I have been busy the last couple years collecting and building modules and rebuilding my main case as pictured , I had originally built one big rack but didn’t like that because it seemed like the modules I wanted to use together were always on opposite sides of the rack or farther . so I built shelf like system with individual rack boxes in it so I could move a row at a time and not have to re-rack individual modules all the time . its working out pretty good so far each box has its own power supply so I can take with when playing somewhere besides home .
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My SEM clone sequenced to a techno sound, in conjunction with Moritz Kleins FM Drum Synthesizer and my MIDI Arpeggiator, under mirrored LFO control of the FM Drum modulator and VCF cutoff. An uncompensated and detuned prototype of the SEM VCO clone is autotuned as a T908 Autotune Module benchmark.
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Things are coming along. The Slopes on the left needs troubleshooting. The fall setting isnt behaving. The attenuverting mixer has a seperate buffered multiples switchable from 1 x 6 or 2 x 3. Those MPS modules are probably going to be a spheghetti western.
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My grandkid and his mother is here and I decided to do some very light diy:ing. Finally got a MIDI cable hooked the MIDI-kbd to my Behringer Crave and next I must connect the keyboard to the MIDI Ultimate.
Still alive and kicking and have serious thoughts of building that Triple Sloth. Have found the tricky parts - huge non-polarized caps and many-Megaohm resistors.
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Get that all wired up and make a racket!
Eins! Zwei! Drei!
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Finished a couple of new modules over the past couple of weeks:
First one is a double side chain (props to Dud/Juanito Moore for the circuit, very much appreciated), with a ‘bonus’ triple inverter (just a spur of the moment idea, cos I needed some). Initially I made the mistake of using an LDR with too higher resistance in the Vactrol and it made for a pretty weak effect. After some head scratching I swapped it out to lower resistance rated LDR and it now lives up to the name a bit more:
The other one was an adaption of the EDP wasp filter with distortion, which sounds pretty good as well, no self oscillation but the distortion makes up for it I reckon. Lots and lots of angry sounding warbling:
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Beautiful work! Case looks sick!! Bet Ur getting some thick textures out of each voice on that!
Like 3 osc per voice :applause:
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Been taking my time doing my first circuit bend.
Quite an ambitious first one… tr505 with a near “burnkit2600” amount of bends lol!
Vol control with that top end crunch.
8x trigger out.
8x filters.
Individual pitch control.
Global pitch control.
Midi in/out with type A/B switches.
Engraved acrylic with edge lighting.
Should be a fun one to do, retro tech is always so easy to dig around in!
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Oh and something else I wanted to make for a few years but was feeling to nooby…
Using an esp32 to read WiFi packets on a WiFi channel, convert it into a CV and make a techy sample n hold out of WiFi.
It’s the sort of thing Heck Seven would appreciate XD
It still needs some work but the code is doing the thing!
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The thing you say. I love projects like this. What/how will you use it?
Do keep us posted.
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It’s basically gonna end up being just like a noise to sample n hold then quantised.
(Which it just now strikes me I could just quantise in the code =O)
But this stems from having a few hacking toys (USB/WiFi Nugget) made by jlcpcb (other manufacturers ARE available) and having spare boards left over.
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What do you do after hours of trouble shooting a ring mod control oscillator that doesnt want to oscillate? You say fuck it, steal a jack from your nice Electro Harmonix Q Tron (who uses the direct out anyway?), put the jack where the frequency control knob was supposed to be, use any other oscillator in your system as the ring mod control oscillator, and call it done.
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I find the trouble shooting to be very frustrating I have no patience , luckily I have a good friend who repairs music stuff for a living and helps me out . glad to hear you have a work around for your situation .
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