# Eddy Bergman MVP Synth Project / Help Needed **URL:** \ **Category:** KOSMO MODULES\ **Created:** [November 29, 2023, 11:32pm UTC](https://lookmumnocomputer.discourse.group/t/eddy-bergman-mvp-synth-project-help-needed/6743 "2023-11-29T23:32:41Z")\ **Posts on this page:** 1\ **Showing post:** 11
**Author:** ![AdamDynamic](https://avatars.discourse-cdn.com/v4/letter/a/dbc845/32.png) [@AdamDynamic](https://lookmumnocomputer.discourse.group/u/AdamDynamic)\ **Post date:** [November 30, 2023, 5:53pm UTC](https://lookmumnocomputer.discourse.group/t/eddy-bergman-mvp-synth-project-help-needed/6743/11 "2023-11-30T17:53:58Z")
Thanks for the many replies 🙂 I’ll attempt to answer the various questions in some sort of logical order: > [@analogoutput](#): > > What’s “MVP”? Indeed, as @BlackDeath mentioned it’s a [Minimum Viable Product](https://en.wikipedia.org/wiki/Minimum_viable_product), or in this instance intended to be the smallest combination of modules that would provide a workable synth (I noticed after I made the post above that I used a similar phrase in my inaugural [November 2020 forum post](https://lookmumnocomputer.discourse.group/t/building-first-modular-synth-minimum-modules-required/2358/1) while still figuring out what “minimum” meant in practice). > [@analogoutput](#): > > One side note: Given that both schematics are pretty much just redraws of the YuSynth schematics, and that you have made them publicly available, it would be courteous to add the URLs for the originals and label the schematics as Yves Usson’s work, rather than for instance “AdamDynamic VCA-001” which makes it look like you’re trying to take credit for the design. Not your intention I’m sure, but it’s not good when schematics get passed around without attribution to the people who created them. This is an important point and worth addressing: it’s absolutely my intention to make explicit reference and give full credit to Eddy, Sam, YuSynth, etc in the “v1.0” of anything I publish online. I never intended to share the v0.x schematics or PCBs publicly and only do so here so that I can (hopefully, finally) satisfy myself that they work (ideally by getting them to work myself) and then write up the project and share with others on the same journey. I work in open source software and I’m very much a champion of proper attribution and giving others permissive licenses to re-use my own contributions to the space (however modest). > [@twinturbo](#): > > how are you even testing them, stripboard? Each project has its own PCB (the gerber files for the [VCA](https://github.com/AdamDynamic/modular-synth/tree/main/modules/vca) and the [ADSR](https://github.com/AdamDynamic/modular-synth/tree/main/modules/adsr) are in the same repo as the schematics) and faceplate, both of which I got fabbed at JLCPCB (rather than use stripboard per my guitar pedal building days, I was inspired by one of Sam’s videos where he starts to convert his synth to PCB having had one-to-many equipment failures at gigs…) > [@EddyBergman](#): > > The ADSR schematic you made I found difficult to read at least the part with all the potmeter connections so I can’t be certain there’s no mistake there but I think it’s all fine. As a reference, I’ve attached photos of the PCB and faceplate for the (happily, fully working) [AS3340 VCO](https://www.eddybergman.com/2020/01/synthesizer-build-part-18-really-good.html). The green terminal blocks connect the pots to the PCB (the numbers on the schematic should correspond to the lug number on the pot). The other modules are all built in the same style. > [@EddyBergman](#): > > Did you make your own PCB designs, or you outsourced it I believe. My guess is there could be one or more mistakes in the PCB designs. The designer(s) who designs the PCB layout uses the same set of design files to create the schematic (i.e. both are done at once), so I _assume_ (but worth me checking) that if the schematic is correct, then the PCB layout is correct. Please say if this is a false assumption though. > [@twinturbo](#): > > Do you have an output LED on the ADSR? I do. > [@BlackDeath](#): > > Much easier to build an AD rather than ADSR “AD”? 🙂 ![IMG_2089](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/7/1/71fa10259b77e5f10da92c786c285074470b8e80.jpeg) ![IMG_2090](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/5/c/5cff3f0da7be3c374c26e64f639cf4164e0ff576.jpeg) --- _[View the full topic](https://lookmumnocomputer.discourse.group/t/eddy-bergman-mvp-synth-project-help-needed/6743)._