# DIY STUFF **URL:** https://lookmumnocomputer.discourse.group/c/diy-stuff/7.md?page=1 [Latest](https://lookmumnocomputer.discourse.group/latest.md) · [Categories](https://lookmumnocomputer.discourse.group/categories.md) **Page:** 2 --- ## [AS2164 VCA trim pot problem](https://lookmumnocomputer.discourse.group/t/as2164-vca-trim-pot-problem/8223)
**Author:** [@nigeld](https://lookmumnocomputer.discourse.group/u/nigeld)\ **Replies:** 3\ **Last updated:** [August 11, 2026, 7:15pm UTC](https://lookmumnocomputer.discourse.group/t/as2164-vca-trim-pot-problem/8223 "2026-08-11T19:15:32Z")
I found this VCA design based on the V2164 by @HAGIWO(thanks for posting it!) here. I thought I’d have a go at building it as I have an AS2164 lying around and, as far as I can tell from the datasheet, they are repl… --- ## [Modernized Orban 245E Stereo Synthesizer!](https://lookmumnocomputer.discourse.group/t/modernized-orban-245e-stereo-synthesizer/8224)
**Author:** [@Synthlurker](https://lookmumnocomputer.discourse.group/u/Synthlurker)\ **Replies:** 0\ **Last updated:** [August 9, 2026, 6:16pm UTC](https://lookmumnocomputer.discourse.group/t/modernized-orban-245e-stereo-synthesizer/8224 "2026-08-09T18:16:56Z")
I saw the Hainbach video on this weird stereolizer module from 1977. There are WAY better mono-stereo expanders/spatializers nowadays, but as the sound was very interesting (and slightly nauseating), I got interested in … --- ## [Two polysynths I built about a year apart](https://lookmumnocomputer.discourse.group/t/two-polysynths-i-built-about-a-year-apart/8221)
**Author:** [@craigyb](https://lookmumnocomputer.discourse.group/u/craigyb)\ **Replies:** 9\ **Last updated:** [August 7, 2026, 10:26am UTC](https://lookmumnocomputer.discourse.group/t/two-polysynths-i-built-about-a-year-apart/8221 "2026-08-07T10:26:11Z")
These are two of my polysynth projects, the top is an 8 voice bi-timbral analogue poly with AS3340 oscillators and AS3372 filters. The lower is a 12 voice bi-timbral digital/analogue polysynth. It has digital oscillators… --- ## [A new synth idea](https://lookmumnocomputer.discourse.group/t/a-new-synth-idea/8197)
**Author:** [@craigyb](https://lookmumnocomputer.discourse.group/u/craigyb)\ **Replies:** 22\ **Last updated:** [August 4, 2026, 5:41pm UTC](https://lookmumnocomputer.discourse.group/t/a-new-synth-idea/8197 "2026-08-04T17:41:17Z")
Just an idea of sorts This is a rough front panel layout for a new 12 voice bi-timbral polysynth using elements of my “A Bit More” design and a pair of self contained voice cards. Each card has dual DCOs, multi pole fi… --- ## [\#123 fridge magnet](https://lookmumnocomputer.discourse.group/t/123-fridge-magnet/8218)
**Author:** [@Willi359](https://lookmumnocomputer.discourse.group/u/Willi359)\ **Replies:** 3\ **Last updated:** [July 31, 2026, 5:23pm UTC](https://lookmumnocomputer.discourse.group/t/123-fridge-magnet/8218 "2026-07-31T17:23:44Z")
There was (?) a limited number of eurovision inspired fridge magnets in the LMNC-shop. they were sold out within ~24 hours. sadly i did not get one. who has mone at the end of the month… did one of you get one? May… --- ## [SAMLA-IKEA-hack for synth-rack](https://lookmumnocomputer.discourse.group/t/samla-ikea-hack-for-synth-rack/8107)
**Author:** [@Tutorius](https://lookmumnocomputer.discourse.group/u/Tutorius)\ **Replies:** 15\ **Last updated:** [July 23, 2026, 11:21am UTC](https://lookmumnocomputer.discourse.group/t/samla-ikea-hack-for-synth-rack/8107 "2026-07-23T11:21:56Z")
My two rack-synths, i did not want to put them out of their racks, so i took an IKEA Samla-nox (i hope it has the same name outside germany) and created a wallmount-rack. The wallmount-additions are 3D-printed, i can tak… --- ## [Got Power and a VCO - what next?](https://lookmumnocomputer.discourse.group/t/got-power-and-a-vco-what-next/8193)
**Author:** [@StewRat](https://lookmumnocomputer.discourse.group/u/StewRat)\ **Replies:** 5\ **Last updated:** [July 18, 2026, 9:43pm UTC](https://lookmumnocomputer.discourse.group/t/got-power-and-a-vco-what-next/8193 "2026-07-18T21:43:23Z")
I’m a 65 yr old beginner at all things electronics, but I’ve hacked together a few Raspi projects and keen to build a modular synth! So far I’ve made a “module” that holds 2 x LRS-50-12 PSUs, and a LMNC CEM334- VCO (cor… --- ## [Pan/Mix/Out module! (need some help)](https://lookmumnocomputer.discourse.group/t/pan-mix-out-module-need-some-help/8203)
**Author:** [@oxenfree](https://lookmumnocomputer.discourse.group/u/oxenfree)\ **Replies:** 19\ **Last updated:** [July 4, 2026, 3:47am UTC](https://lookmumnocomputer.discourse.group/t/pan-mix-out-module-need-some-help/8203 "2026-07-04T03:47:21Z")
Hey all, I am trying to design an all in one output module, I want it to consist of a CV Panner, a mixer, and outputs for headphones and speakers (might get crazy an add an equalizer if i have enough panel space). It lo… --- ## [Trying to optimize PT2399 reverbs before microprocessors take over their job](https://lookmumnocomputer.discourse.group/t/trying-to-optimize-pt2399-reverbs-before-microprocessors-take-over-their-job/8204)
**Author:** [@Synthlurker](https://lookmumnocomputer.discourse.group/u/Synthlurker)\ **Replies:** 2\ **Last updated:** [July 2, 2026, 5:14pm UTC](https://lookmumnocomputer.discourse.group/t/trying-to-optimize-pt2399-reverbs-before-microprocessors-take-over-their-job/8204 "2026-07-02T17:14:34Z")
This is one of those projects that I might possibly have no time to complete myself, but thought that I might share some findings that will make it easier to design some good sounding reverbs with good ol’ PT2399. First… --- ## [Dr-660 power supply mod (because I hate it’s current power situation)](https://lookmumnocomputer.discourse.group/t/dr-660-power-supply-mod-because-i-hate-it-s-current-power-situation/8195)
**Author:** [@PetMilk](https://lookmumnocomputer.discourse.group/u/PetMilk)\ **Replies:** 4\ **Last updated:** [July 1, 2026, 4:01am UTC](https://lookmumnocomputer.discourse.group/t/dr-660-power-supply-mod-because-i-hate-it-s-current-power-situation/8195 "2026-07-01T04:01:16Z")
So really the question is, will this work? I hate that you need a specific AC power supply and I hate that the barrel connector and receptacle is weird and big and just annoying so here’s some pics with my idea. … --- ## [Simple 3 transistor signal to sidechain CV converter from Shure Level-Loc Limiter](https://lookmumnocomputer.discourse.group/t/simple-3-transistor-signal-to-sidechain-cv-converter-from-shure-level-loc-limiter/8202)
**Author:** [@Synthlurker](https://lookmumnocomputer.discourse.group/u/Synthlurker)\ **Replies:** 0\ **Last updated:** [June 16, 2026, 10:45am UTC](https://lookmumnocomputer.discourse.group/t/simple-3-transistor-signal-to-sidechain-cv-converter-from-shure-level-loc-limiter/8202 "2026-06-16T10:45:02Z")
During this summer among other projects I have been simulating and slowly improving old Shure Level-Loc circuitry to figure out how I could try to make it more line/Eurorack level signal friendly. Its sidechain circuit m… --- ## [Эмулятор в HTML](https://lookmumnocomputer.discourse.group/t/html/8201)
**Author:** [@Mich76](https://lookmumnocomputer.discourse.group/u/Mich76)\ **Replies:** 5\ **Last updated:** [June 12, 2026, 10:15am UTC](https://lookmumnocomputer.discourse.group/t/html/8201 "2026-06-12T10:15:51Z")
Привет волшебники!!! :grin: Я придумал эмулировать свои будущие поделки прямо в браузере через HTML код! Это очень удобно, можно перепробовать функционал, дизайн, а потом всё это собрать в железе :fire: Я собрал в HTM… --- ## [VCO output clipping, what do I need to change?](https://lookmumnocomputer.discourse.group/t/vco-output-clipping-what-do-i-need-to-change/8150)
**Author:** [@nigeld](https://lookmumnocomputer.discourse.group/u/nigeld)\ **Replies:** 10\ **Last updated:** [June 12, 2026, 5:18am UTC](https://lookmumnocomputer.discourse.group/t/vco-output-clipping-what-do-i-need-to-change/8150 "2026-06-12T05:18:34Z")
Hi, I’m building a VCO based on the 1222 but now with a lot of mods (the design can be found here) but I’ve hit a problem with my output where connecting a speaker ‘clips’ the output. Here is the output before I connect… --- ## [VCO breadboard problem](https://lookmumnocomputer.discourse.group/t/vco-breadboard-problem/8116)
**Author:** [@nigeld](https://lookmumnocomputer.discourse.group/u/nigeld)\ **Replies:** 2\ **Last updated:** [June 11, 2026, 3:59pm UTC](https://lookmumnocomputer.discourse.group/t/vco-breadboard-problem/8116 "2026-06-11T15:59:04Z")
I’ve created a VCO design based on the LMNC 1222 design but without the tuner and adding in a sine wave generator and a 6 octave selector. I thought I’d build it out on a breadboard first before designing a pcb for this … --- ## [Super Super JX 10](https://lookmumnocomputer.discourse.group/t/super-super-jx-10/7939)
**Author:** [@craigyb](https://lookmumnocomputer.discourse.group/u/craigyb)\ **Replies:** 25\ **Last updated:** [June 4, 2026, 1:12am UTC](https://lookmumnocomputer.discourse.group/t/super-super-jx-10/7939 "2026-06-04T01:12:39Z")
It’s alive (again)… I really need to stop these “It’s alive” posts, but here’s another one. The Super JX boards arrived the other day and I finally got them on the bench last night. I struggled a bit with the display an… --- ## [Rack mount Poly 61](https://lookmumnocomputer.discourse.group/t/rack-mount-poly-61/8185)
**Author:** [@craigyb](https://lookmumnocomputer.discourse.group/u/craigyb)\ **Replies:** 1\ **Last updated:** [May 24, 2026, 3:22pm UTC](https://lookmumnocomputer.discourse.group/t/rack-mount-poly-61/8185 "2026-05-24T15:22:14Z")
Last year I built this rack mount Poly 61 from eBay parts and a spare Tauntek motherboard. It works very well, but since I built an editor for my keyboard version I decided that the rack version also needed and onboard … --- ## [Need help with an Rpi Pico](https://lookmumnocomputer.discourse.group/t/need-help-with-an-rpi-pico/8118)
**Author:** [@didordure](https://lookmumnocomputer.discourse.group/u/didordure)\ **Replies:** 13\ **Last updated:** [May 23, 2026, 11:00am UTC](https://lookmumnocomputer.discourse.group/t/need-help-with-an-rpi-pico/8118 "2026-05-23T11:00:04Z")
Hello, I am not a good programmer at all but I manage to make my accordion keyboard work as far as notes go. I needed 5 potentiometers to control different parameters so I installed an ADS1115. It is working perfectly… --- ## [Korg DW6000 rack mount conversion](https://lookmumnocomputer.discourse.group/t/korg-dw6000-rack-mount-conversion/7900)
**Author:** [@craigyb](https://lookmumnocomputer.discourse.group/u/craigyb)\ **Replies:** 7\ **Last updated:** [May 18, 2026, 3:46pm UTC](https://lookmumnocomputer.discourse.group/t/korg-dw6000-rack-mount-conversion/7900 "2026-05-18T15:46:18Z")
Another project to while away the time before the Russians get here… --- ## [6 note poly voice card](https://lookmumnocomputer.discourse.group/t/6-note-poly-voice-card/8142)
**Author:** [@craigyb](https://lookmumnocomputer.discourse.group/u/craigyb)\ **Replies:** 9\ **Last updated:** [May 18, 2026, 11:00am UTC](https://lookmumnocomputer.discourse.group/t/6-note-poly-voice-card/8142 "2026-05-18T11:00:32Z")
Probably the narrowest MIDI to CV converters, I got this idea from the JX-10/8p synths. Each voice card is a self contained 6 voice synth with just data and clock fed to it. Now as I already have a DCO core that generate… --- ## [MidiWoush PS8-Sequencer next project-version](https://lookmumnocomputer.discourse.group/t/midiwoush-ps8-sequencer-next-project-version/8147)
**Author:** [@Tutorius](https://lookmumnocomputer.discourse.group/u/Tutorius)\ **Replies:** 12\ **Last updated:** [May 16, 2026, 10:24am UTC](https://lookmumnocomputer.discourse.group/t/midiwoush-ps8-sequencer-next-project-version/8147 "2026-05-16T10:24:50Z")
My PS8-Sequencer has taken the next step. I have got the partly assembled PCBs some weeks ago (from china, with SMD-parts on it, but not fully populated) and was able to create a soldering-video doing the Through-hole-pa… --- ## [16 Step Sequencer unverified ! Who checks with?](https://lookmumnocomputer.discourse.group/t/16-step-sequencer-unverified-who-checks-with/6215)
**Author:** [@peppy](https://lookmumnocomputer.discourse.group/u/peppy)\ **Replies:** 2\ **Last updated:** [May 11, 2026, 8:45am UTC](https://lookmumnocomputer.discourse.group/t/16-step-sequencer-unverified-who-checks-with/6215 "2026-05-11T08:45:44Z")
Hello folks, I came across this one while looking for a simple 16-step sequencer on the internet: Step by Step (ES Dec 84) This is a design from the 80’s by a Mr. “Jake Rothman” from the newspaper: “Elektronik Soundma… --- ## [Big Muff Fuzz Modular Edition](https://lookmumnocomputer.discourse.group/t/big-muff-fuzz-modular-edition/8165)
**Author:** [@Marty](https://lookmumnocomputer.discourse.group/u/Marty)\ **Replies:** 1\ **Last updated:** [April 29, 2026, 11:12pm UTC](https://lookmumnocomputer.discourse.group/t/big-muff-fuzz-modular-edition/8165 "2026-04-29T23:12:44Z")
Hi guys. I would like to share something i’ll be very proud of. Besides building modules for my modular synth system, i also find it very interessting building guitar pedals. Normally i would use metal hammond cases for… --- ## [Korg PME-40x Stomp Box Conversion Guide](https://lookmumnocomputer.discourse.group/t/korg-pme-40x-stomp-box-conversion-guide/8162)
**Author:** [@WesleyV](https://lookmumnocomputer.discourse.group/u/WesleyV)\ **Replies:** 4\ **Last updated:** [April 28, 2026, 2:42am UTC](https://lookmumnocomputer.discourse.group/t/korg-pme-40x-stomp-box-conversion-guide/8162 "2026-04-28T02:42:57Z")
Hey y’all, been sitting on this one for a while - I’ve been drooling over the Korg PME 40x guitar effect cartridges for a while, but I’m too lazy to commit to the whole docking station ecosystem. I put together some 3d p… --- ## [Are Friends Magnetic? - mischief with tape recorders](https://lookmumnocomputer.discourse.group/t/are-friends-magnetic-mischief-with-tape-recorders/7639)
**Author:** [@ShedSynth](https://lookmumnocomputer.discourse.group/u/ShedSynth)\ **Replies:** 12\ **Last updated:** [April 25, 2026, 12:44pm UTC](https://lookmumnocomputer.discourse.group/t/are-friends-magnetic-mischief-with-tape-recorders/7639 "2026-04-25T12:44:54Z")
Hi, there must be a few of us in here playing with tape: cassettes? spliced loops? echo machines? portastudios? 1-inch multitrack? Who’s got interesting stuff to share? --- ## [Tempco 2k PTC 3300ppm resistor](https://lookmumnocomputer.discourse.group/t/tempco-2k-ptc-3300ppm-resistor/8159)
**Author:** [@Marty](https://lookmumnocomputer.discourse.group/u/Marty)\ **Replies:** 0\ **Last updated:** [April 24, 2026, 5:57pm UTC](https://lookmumnocomputer.discourse.group/t/tempco-2k-ptc-3300ppm-resistor/8159 "2026-04-24T17:57:55Z")
Hi all, If someone needs a Tempco 2k PTC Thermistor for example when buillding a Thomas Henry VCO555 just let me know. I have a few to spare. As you might know they will not be reproduced when out of stock in stores.. H… --- ## [Triple LoFi isd 1820](https://lookmumnocomputer.discourse.group/t/triple-lofi-isd-1820/7281)
**Author:** [@Hugo\_o](https://lookmumnocomputer.discourse.group/u/Hugo_o)\ **Replies:** 4\ **Last updated:** [April 22, 2026, 2:52pm UTC](https://lookmumnocomputer.discourse.group/t/triple-lofi-isd-1820/7281 "2026-04-22T14:52:08Z")
Hello everyone, I’m sharing my last work of spring with you. A small box with three LoFi samplers for my modular. The goal was to have something to have fun with samples in a small box. I added some modifications s… --- ## [TH-555 VCO Stripboard Layout!](https://lookmumnocomputer.discourse.group/t/th-555-vco-stripboard-layout/2510)
**Author:** [@BlackDeath](https://lookmumnocomputer.discourse.group/u/BlackDeath)\ **Replies:** 38\ **Last updated:** [April 20, 2026, 3:49pm UTC](https://lookmumnocomputer.discourse.group/t/th-555-vco-stripboard-layout/2510 "2026-04-20T15:49:54Z")
A huge drop! An amazing non-3340 VCO circuit with v/oct and FM, finally with a stripboard layout! From EB, here: https://www.eddybergman.com/2020/12/synthesizer-build-part-37-thomas-henry.html Video: https://www.yout… --- ## [From Reddit - Stripboard layout creator/validator](https://lookmumnocomputer.discourse.group/t/from-reddit-stripboard-layout-creator-validator/8158)
**Author:** [@krztoff](https://lookmumnocomputer.discourse.group/u/krztoff)\ **Replies:** 0\ **Last updated:** [April 13, 2026, 7:48pm UTC](https://lookmumnocomputer.discourse.group/t/from-reddit-stripboard-layout-creator-validator/8158 "2026-04-13T19:48:51Z")
Demo: https://vcad.idoroseman.com GitHub: https://github.com/idoroseman/vcad-online --- ## [Voltage Controlled Vactrol based Crossfader](https://lookmumnocomputer.discourse.group/t/voltage-controlled-vactrol-based-crossfader/8143)
**Author:** [@Marty](https://lookmumnocomputer.discourse.group/u/Marty)\ **Replies:** 0\ **Last updated:** [April 2, 2026, 7:14pm UTC](https://lookmumnocomputer.discourse.group/t/voltage-controlled-vactrol-based-crossfader/8143 "2026-04-02T19:14:35Z")
Hi Eddy, Just completed the Crossfader Module based on your schematic :slight\_smile:. Its working very good and I have no bleed or whatsoever. (Maybe the 20k resistor of the CV is causing this and should also be a 100k?… --- ## [Simple Pico 2 RP2350 based dual DCO](https://lookmumnocomputer.discourse.group/t/simple-pico-2-rp2350-based-dual-dco/8135)
**Author:** [@craigyb](https://lookmumnocomputer.discourse.group/u/craigyb)\ **Replies:** 5\ **Last updated:** [April 1, 2026, 10:38am UTC](https://lookmumnocomputer.discourse.group/t/simple-pico-2-rp2350-based-dual-dco/8135 "2026-04-01T10:38:53Z")
This is a simple dual DCO that I developed this afternoon after being fedup with these so called developer libraries that allow you to build a DCO but within their constraints and no way to change things. I kept it simpl… [Previous page](https://lookmumnocomputer.discourse.group/c/diy-stuff/7.md) [Next page](https://lookmumnocomputer.discourse.group/c/diy-stuff/7.md?page=2)