# Can someone please check my Layout from 3340 VCO?

**URL:** <https://lookmumnocomputer.discourse.group/t/can-someone-please-check-my-layout-from-3340-vco/1473>\
**Category:** DIY STUFF\
**Created:** [July 19, 2020, 10:49am UTC](https://lookmumnocomputer.discourse.group/t/can-someone-please-check-my-layout-from-3340-vco/1473 "2020-07-19T10:49:08Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![THOGRE](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/thogre/32/5189_2.png) [@THOGRE](https://lookmumnocomputer.discourse.group/u/THOGRE)\
**Post date:** [July 19, 2020, 10:49am UTC](https://lookmumnocomputer.discourse.group/t/can-someone-please-check-my-layout-from-3340-vco/1473/1 "2020-07-19T10:49:08Z")

</div>

Hi @ everyone! Can someone please check my stripboard layout. I built the pots on the PCB and added a Eurorack like plug. Basically it is Sam’s design or from the alfa4 VCO like most that you can find on the Internet.  
I haven’t tested it yet and it’s probably not elegant either, but I think it works that way and I didn’t make a mistake. Would be great if one of our professionals could look.

 ![alfa4VCO Wannenstecker_ final-fürLMNC Forum](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/0/05d5ec08eaed631748fa10bfccbd6882671e007c.jpeg)

Greetings THOGRE

---

<div class="post-metadata">

**Author:** ![THOGRE](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/thogre/32/5189_2.png) [@THOGRE](https://lookmumnocomputer.discourse.group/u/THOGRE)\
**Post date:** [July 19, 2020, 3:43pm UTC](https://lookmumnocomputer.discourse.group/t/can-someone-please-check-my-layout-from-3340-vco/1473/2 "2020-07-19T15:43:55Z")

</div>

@Dud , @Caustic , @KristianBloch , @fredrik ?  
Is none of you there? And could you look over there please?

---

<div class="post-metadata">

**Author:** ![Caustic](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/caustic/32/15588_2.png) [@Caustic](https://lookmumnocomputer.discourse.group/u/Caustic)\
**Post date:** [July 19, 2020, 8:56pm UTC](https://lookmumnocomputer.discourse.group/t/can-someone-please-check-my-layout-from-3340-vco/1473/3 "2020-07-19T20:56:11Z")

</div>

I have seen you post for updates and help here and other threads. I dont have time right now to fine-comb your stripboard layout, but if you are basing this off of Sam’s layout, many folks have done their own spins on it as you have. Perhaps you can cross reference those! 🙂

Here is mine, which is also is 80% ripped wholecloth from other’s work. Be sure to read the thread sine many folks questioned my design and were right to do so. Their wisdom should be read as well.

> [@AS3340 VCO /w hard/soft sync, FM modulation](https://lookmumnocomputer.discourse.group/t/as3340-vco-w-hard-soft-sync-fm-modulation/249):
>
> Hey yall, I got some time today to take a look at my old VCO build. Couldn’t figure out what the hell was wrong with it, so i just built it again. Rather than just be boring, i also attempted to add the other features that were not included in the original stripboard design. Things like soft / hard sync and FM modulation. I dont really have the capacity to check that this works right as is, i did my best given the diagram in the datasheet and some example schematics on Electric Druid. All i ca…